H13-624-Enu V8.02 [PDF]

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Exam

: H13-624-ENU

Title

:

HCIP-Storage V5.0

Version : V8.02

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1.Which is the basal protocol used by SANs for I/O processing? A. FC B. SCSI C. HTTP D. IP Answer: B 2.A file protected by WORM cannot be: (Multiple Choice) A. Read B. Deleded C. Renemed D. Created E. Modified Answer: BCE 3.SmartQoS uses Traffic Controls, which in turn consists of: (Multiple Choice) A. A number of queues, depending on the number of services. B. A number of tokens, automatically adjusted by the system. C. A system of allocating tokens to I/O requests. D. A system of releasing tokens to the token bucket. Answer: BCD 4.SmartMigration uses LUNS mapped from heterogeneous storage arrays to the local storage array as logical disks (LDs) that can provide storage space for the local storage array and create eDevLUNs that can be mapped to the host on LDs. A. TRUE B. FALSE Answer: B 5.Which of the following statements is correct? Statement 1: Manually selecting disks for a disk domain is a risky, therefore unadvised, process. Statement 2: All LUNs in a disk domain must share the same RAID level. A. Statement 1 and 2 are both true, B. Statement 1 is true. Statement 2 is false. C. Statement 1 is false. Statement 2 is true. D. Statement 1 and 2 are both false. Answer: B 6.Because SmartDedupe and SmartCompression can reduce the total required storage spacer, they can also reduce the initial investment. A. TRUE B. FALSE Answer: A

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7.Which protocol provides the fastest transfer speed? A. 10 GE iSCSI B. FC0E C. FC D. Infiniband Answer: D 8.From a Windows client perspective, a NAS looks more like a network drive whereas a SAN looks more like a local drive. A. TRUE B. FALSE Answer: A 9.Which of the following statements is true. A) An eDevLUN is always on a third party device? B) A mirror copy should come from a different domain than the local LUN? A. Statement A is true and Statement B is false. B. Statement A is false and Statement B is true. C. Both statements are true. D. Both statements are false. Answer: B 10.SmartDedupe of the OceanStor 5300 V3 is supported only by the thin file system. A. TRUE B. FALSE Answer: B 11.Which of the following statements about SmartErase is/are true. A) SmartErase allows a disk whose data has been erased to be reused after a dab destruction task is completed? B) SmartErase deletes data, that belongs to a specific LUN, permanently from disks to prevent it from being recovered by unauthorized users using residual data? A. Statement A is true and Statement B is false. B. Statement A is false and Statement B is true. C. Both statements are true. D. Both statements are false. Answer: B 12.Assume you are the administrator of a storage system and you need to plan storage capacity. The storage device has six disks, and the dab traffic is random and small. Which of the following is the best capacity plan? A. RAID 3 (4D+1P) and Low spare space policy. B. RAID 5 (4D+1P) and Low spare space policy, C. RAID 3 (3D+1P) and High spare space policy. 3 / 88

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D. RAID 5 (3D+1P) and High spare space policy. Answer: B 13.A colleague suggests using Hyper Clone to create a remote copy of a LUN to provide a remote office with the correct data. This is? A. Not possible because clones are created within the boundaries of a storage device. B. Possible but will require a very high bandwidth link. C. Possible but an expensive solution. D. Not possible because clones do not provide copies of LUN's, Answer: A 14.Which of the following components is used to transfer information flow and service data flow between controllers in the OceanStor 18000 series? A. SVP B. KVM C. PCIe switch D. Engine Answer: C 15.When an OceanStor is powered by the BBU's it means that only the controller is powered. A. TRUE B. FALSE Answer: B 16.Which of the following statements about diagnosing the OceanStor 5300 V3 are correct? (Multiple Choice) A. View particular alarms before general alarms. B. View external errors before internal errors. C. View advanced errors before low-level errors. D. Replace faulty devices before viewing alarms or errors. Answer: BC 17.Select all that apply. Which functions are provided by the ACC module? (Multiple Choice) A. Fixed-length compression B. Fingerprint computing C. Hardware acceleration D. Reducing CPU load Answer: BCD 18.Which redundancy mode is adopted by the power supplies in the OceanStor 5600 V3 with 3 U enclosure? A. 2+2 4 / 88

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B. 2+1 C. 1+1 D. 4+4 Answer: C 19.When exporting logging from within OceanStor Toolkit, we can select; A. XIS format B. CSV format C. TKT forma D. XML format Answer: A 20.Which of the following statements about SmartQuota of the OceanStor 5300 V3 are incorrect? (Multiple Choice) A. Quota trees can be shared through protocols and cannot be renamed or deleted during sharing. B. Files can be relocated across quota trees. C. Files cannot be relocated across quota trees. D. Root quota trees can be deleted on the Device Manager. Answer: BD 21.A colleague suggests purchasing a second storage system and then cloning LUN's between them to provide redundancy. This is; A. A cheap and effective way to establish redundancy at a LUN level. B. Not possible because LUN's cannot be cloned. C. Not possible because LUN's can only be cloned within a storage system. D. An expensive way to establish redundancy at a LUN level Answer: C 22.Which of the following File System Protocols are available in the OceanStor V3 devices? (Multiple Choice) A. FTP B. CIS C. Apple Talk D. NFS Answer: ABD 23.Serial communication to the OceanStor V3 controller is configured at: A. 9600 Baud B. 19,200 Baud C. 56,800 Baud D. 115,200 Baud Answer: D

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24.Which of the following statements is correct? Statement 1: The property (File or Block) of a storage pool cannot be changed. Statement 2: Before deleting a storage pool, all LUNS must be removed. A. Statement 1 and 2 are both true. B. Statement 1 is true. Statement 2 is false. C. Statement 1 is false. Statement 2 is true. D. Statement 1 and 2 are both false. Answer: A 25.What technology is used in SmartDedupe of the OceanStor 5300 V3? A. SHA255 B. SHA256 C. SHA128 D. SHA1 Answer: D 26.Multipathing technology is introduced to address single points of failure (SPOF) on storage networks. A. TRUE B. FALSE Answer: A 27.In synchronous remote replication, after a write request is issued from the server to the storage, how is the request sent? A. The request is sent in the sequence of the cache in the primary storage, disks in the primary storage, cache in the secondary storage and disks in the secondary storage. B. The request is sent to the cache in the primary storage, and the cache sends it to the cache in the secondary storage. C. The request is sent to the cache in the primary and secondary storage at the same time, D. The request is sent to the cache in the primary storage, and then multi-time-segment caching is enabled to synchronize the request to the cache in the secondary storage. Answer: C 28.Which of the following RAID levels has the least efficient space utilization? A. RAID 10 B. RAID 1 C. RAID 5 D. RAID 6 Answer: B 29.A colleague suggests creating a cache partition with 128MB write cache and 2GB read cache for a video broadcast application. This is: A. A good configuration since most 10 will be read. B. A valid configuration, but not optimal for video broadcast applications. 6 / 88

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C. An invalid configuration because read and write cache must be equal. D. An invalid configuration because the write cache is below the minimum. Answer: D 30.Which services are affected when we restart a dual controller storage device? A. Only services not configured to use either controller. B. Only services configured to use both controllers. C. No services are affected. D. All services on the storage device. Answer: D 31.Suppose that you allocate 20 GB to a thin LUN, write 30 GB to the LUN, and then delete 25 GB data from it. How large is the thin LUN now? A. 5 GB B. 10 GB C. 20 GB D. 30 GB Answer: C 32.Which of the following is not a NAS protocol? A. CIFS B. NFS C. FTP D. FC Answer: D 33.The remote reporting functionality called Cloud Service is: A. An integrated part of any Huawei storage device. B. An integrated part of any Huawei V3 storage device. C. An additional Huawei Support Service. D. An integrated part of the OceanStor Toolkit. Answer: C 34.You can log in to the CLI of the OceanStor V3 storage through IPv4 or IPv6. A. TRUE B. FALSE Answer: A 35.If the space hard quota is exceeded, a write operation will: (Multiple Choice) A. Generate an alarm B. Fail C. Generate an error D. Succeed 7 / 88

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Answer: BC 36.In RAID2.0+, chunks in one chunk group can come from SSD and SAS disks. A. TRUE B. FALSE Answer: B 37.Your colleague has advised a customer with a small VMware environment to purchase the SmartDedupe/SmartCompression license with their new StorageSystem to reduce the amount of diskspace required. This is: A. A good advice, there is a lot of duplicate data in the Operating System. B. An advice driven by marketing, the reduced amount of diskspace required is minimal. C. Not a good advice, deduplication will not reduce the required diskspace because every VM is unique, D. Not a good advice. Although the customer will require less diskspace, the performance of the system will decrease significantly. Answer: A 38.Which of the following statements about SmartQoS is true: A) Lower-priority I/O can be rejected in favor of higher-priority I/O? B) SmartQoS uses a queuing system for I/O requests? A. Statement A is true and Statement B is false. B. Statement A is false and Statement B is true. C. Both statements are true. D. Both statements are false. Answer: C 39.Every OceanStor V3 model is fitd with at least 6 coffer disks. A. TRUE B. FALSE Answer: B 40.What type of volume used by eDevLUN is directly provided by a Huawei storage device? A. Data volume B. Meta volume C. External LUN D. Target LUN Answer: B 41.SmartMigration can relocate all services from the source LUN to the target LUN only when services on the host are stopped. A. TRUE B. FALSE Answer: B 8 / 88

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42.What does the term RTO mean? A. Return Time Objective B. Replication Time Objective C. Recovery Time Objective D. None of the answers Answer: C 43.In the HyperMetro active-active solution, it is recommended that UltraPath be installed on the host. A. TRUE B. FALSE Answer: A 44.Which counters can be used to evaluate the performance of a SAN system? (Multiple Choice) A. IOPS B. Bandwidth C. CPU usage D. Memory usage Answer: AB 45.Which of the following is not supported by Hyper Metro? A. Data zero copy B. Fast Write C. Memory ballooning D. Optimized cross-site access Answer: C 46.Which of the following statements about thin and thick LUNS are incorrect? (Multiple Choice) A. Initial capacity must be configured for both thin and thick LUNs. B. Thin and Thick LUNS can be configured in the same storage pool, C. A thin or thick LUN can be greater than or equal to the available capacity of the storage pool where they reside. D. Thin or thick LUNS can be batch created. Answer: AC 47.Each tier in a disk domain can be assigned a different hot spare policy. A. TRUE B. FALSE Answer: A 48.Which of the following are characteristics of an ideal backup and disaster recovery system? A. Large RTO, Small RPO B. Large RTO, Large RPO C. Small RTO, Small RPO 9 / 88

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D. Small RTO, Large RPO Answer: C 49.Which of the following remote replication plans can be used in a geo-redundancy disaster recovery solution? (Multiple Choice) A. Intra-city synchronous remote replication through optical fibers B. Intra-city synchronous remote replication through IB link C. Inter-city asynchronous remote replication through IB link D. Inter-city asynchronous remote replication through Ethernet Answer: AD 50.Which of the following statements is correct? Statement 1: An extended disaster recovery strategy could include multiple replicas to be created on two different sites. Statement 2: With multiple replication in place the hyo replicas can be created using different methods: synchronous and asynchronous. A. Statement 1 and 2 are both true. B. Statement 1 is true. Statement 2 is false. C. Statement 1 is false, Statement 2 is true. D. Statement 1 and 2 are both false. Answer: A 51.A Clone task fails. This could be caused by; (Multiple Choice) A. The source LUN is smaller than the target LUN. B. The target LUN is not on the same controller. C. The target LUN is in use by another service. D. The target LUN is not mapped to a host, Answer: AB 52.In Huawei synchronous remote replication, the primary and secondary LUNs can reside in the same storage array. A. TRUE B. FALSE Answer: A 53.What is the maximum bandwidth per port of a 12 Gb/s SAS card in an OceanStor V3 storage device? A. 12 Gb/s B. 24 Gb/s C. 36 Gb/s D. 48 Gb/s Answer: D 54.Clone is a snapshot technology and a backup method that can be used for incremental 10 / 88

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synchronization and a clone copy is a full copy of dab at a specific point in time. A. TRUE B. FALSE Answer: A 55.HyperClone supports writting to both the primary and secondary LUN. A. TRUE B. FALSE Answer: A 56.Which redundancy mode is adopted by the power supplies in the OceanStor 5300 V3 with 2 U enclosure? A. 2+2 B. 2+1 C. 1+1 D. 4+4 Answer: C 57.An application Server cannot access a Snapshot volume. This is because? A. The Snapshot is not activated. B. The Snapshot is activated. C. The Snapshot is locked. D. The Snapshot is being replicated. Answer: A 58.Which of the following statements is correct. Statement 1: The number of zones in a switch is unlimited? Statement 2: An alias is a symbolic name which is used to refer to the complex WWN? A. Statement 1 and Statement 2 are both True. B. Statement 1 is True; Statement 2 is False. C. Statement 1 is False; Statement 2 is True. D. Statement 1 and Statement 2 are both False. Answer: C 59.You create a new file on a WORM filesystem. The file will be in which state: A. New B. Locked C. Initial D. Reserved Answer: C 60.Under which conditions can HypetClone be used? (Multiple Choice) 11 / 88

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A. The primary and secondary LUNS are of the same capacity. B. The primary and secondary LUNS belong to the same controller. C. The primary and secondary LUNS can be used in different storage systems. D. With Smart Virtualization used, the primary LUN can take control of the secondary LUN of a heterogeneous storage system. E. The primary and secondary LUNS reside in the same storage system. Answer: ABE 61.A Cache partition and the LUN must always belong to? A. The same engine. B. The same controller. C. The same storage device. D. All of the above. Answer: A 62.An interface module should be replaced within: A. 5 seconds B. 15 seconds C. 120 seconds (2 minutes) D. 300 seconds (5 minutes) Answer: D 63.What are the values of recovery point objective (RPO) and recovery time objective (RTO) in Huawei synchronous remote replication? A. RPO ≈ 0 RTO = 0 B. RPO = 0 RTO ≈ 0 C. RPO = 0 RTO = 0 D. RPO > 0 RTO > 0 Answer: A 64.Which of the following statements is correct? Statement 1: With one disk domain and one storage pool present, you can define two tiering policies. Statement 2: RAID protection levels are assigned in a disk domain. A. Statement 1 and 2 are both true. B. Statement 1 is true. Statement 2 is false. C. Statement 1 is false. Statement 2 is true. D. Statement 1 and 2 are both false. Answer: D 65.HyperMirror can be used for: (Multiple Choice) 12 / 88

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A. Heterogeneous backup environments. B. High availability of critical applications. C. Reducing disaster recovery risks. D. Protecting data on a third party LUN. Answer: ABCD 66.In a fully redundant SAN infrastructure there is no need to use multipathing software on hosts that run Linux-based operating systems. A. TRUE B. FALSE Answer: B 67.Which of the following shows the correct sequence of planning tasks? A = Determine DR strategy. B = Determine the need for Virtualization. C = inventory of current situation. D = Calculate capacity requirements. E = Determine the backup strategy. F = Estimate future growth. A. B-D-C-F-E-A B. C-D-B-A-F-E C. C-D-F-B-A-E D. A-B-E-C-D-F Answer: C 68.If a switch administrator does not want to use port zoning, it is preferred that he uses WWN zoning instead of alias zoning. A. TRUE B. FALSE Answer: B 69.What type of LUN is compatible with SmartErase? A. Thin LUN B. Thick LUN C. Snapshot LUN D. Mirror LUN Answer: B 70.Before a customer purchases Huawei storage devices for video surveillance, backup, and archiving, what factors do they need to consider? A. IOPS B. Bandwidth C. Latency D. CPU usage 13 / 88

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Answer: B 71.What is the heigth of the High Density disk enclosure? A. 2U B. 3U C. 4U D. 6U Answer: C 72.Which storage tier is not supported by SmartTier of the OceanStor V3 storage systems? A. High-performance tier B. Performance tier C. Low-performance tier D. Capacity tier Answer: C 73.When connecting more than three FC switches together, what are three possible network designs? (Multiple Choice) A. Ring Network B. Meshed Network C. Star Network D. Core - Edge design Answer: ABD 74.Which type of files is not recommended to be transferred through ASCII of FTP? A. *.txt B. *.bat C. *.cfg D. *.bin Answer: D 75.Which redundancy mode is adopted by the power supplies in the OceanStor 6800 V3 with 6 U enclosure? A. 2+2 B. 2+1 C. 1+1 D. 4+4 Answer: A 76.LUN Copy could be considered for. (Multiple Choice) A. Migration of data from third patty storage. B. Centralized backup in a heterogenous environment. C. Distribution of data in a heterogenous environment. D. A high availability cluster. 14 / 88

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Answer: ABC 77.When creating disk domains select the option "All available disks" and then manually select disks. A. TRUE B. FALSE Answer: B 78.After creating a snapshot for the source LUN, modify the existing dab in the source LUN. In this scenario, where is changed data written? A. COW data space B. Snapshot LUN C. Source LUN D. Shared mapping table Answer: A 79.SmartPartition can: (Multiple Choice) A. Automatically partitions physical disks. B. Divide read and write cache into partitions. C. Prevent one service from claiming all resources. D. Allocate resources on demand. Answer: BCD 80.Which of the following features are supported by thin LUNs? (Multiple Choice) A. SmartDedupe B. SmartQuota C. SmartErase D. SmartCompression Answer: AD 81.Which of the following operations performed in a file system does not require quota check? A. Adding files B. Viewing or accessing files C. Modifying files D. Deleting files Answer: D 82.Assuming a setup with 1 host (A), 1 controller (B), 1 switch (C) and 1 disk enclosure (D). The correct order of powering on in a new installation is: A. A-B-C-D B. D-C-B-A C. A-C-B-D D. D-B-C-A Answer: D

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83.Which of the following are included in the 4S technologies used in OceanStor 6800 V3 and 18000 series? (Multiple Choice) A. Scale-into B. Scale-up C. Scale-out D. Scale-down Answer: BC 84.Select all interfaces which are ALWAYS present in an OceanStor 5500 V3. (Multiple Choice) A. SAS expansion port B. Management interface C. Maintenance interface D. 9 pin D-connector serial interface E. USB port F. SmartIO port Answer: ABCEF 85.What is true about the OceanStor V3 series? A. All controllers can be fitted with DC power modules. B. Controllers do not contain disks. C. All controllers have 6 coffer disks. D. Maintenance interface is for serial communication. Answer: A 86.Where is the shared mapping table stored with HyperSnap? A. COW data B. Source LUN C. Snapshot LUN D. COW meta Answer: D 87.A colleague suggests using SmartMigration to distribute dab from one source to multiple targets simultaneously. This is: A. Not possible with SmartMigration. B. A possible solution, but not a good solution. C. A possible and good solution. D. Only possible if all targets are on the same storage device. Answer: A 88.If the quorum server mode is used in HyperMetro, where is the quorum server placed? A. Primary site B. Disaster recovery site C. Third-party site 16 / 88

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D. Primary site, disaster recovery site, and third-party site (place one at each site) Answer: C 89.OceanStor CloudService is a professional remote maintenance system that monitors customer's device alarms around the clock. A. TRUE B. FALSE Answer: A 90.Which of the following statements about 2-way backup of NDMP are correct? (Multiple Choice) A. NAS devices send data to its directly-connected tape devices through optical fibers. B. In 2-way backup mode, data is transferred from disks on the NDMP host to the tapes on the same NDMP host, Backup dab is not transferred over a LAN. C. In 2-way backup mode, NPS devices are used as main storage. The backup server sends requests to the NDMP host on the LAN to instruct NAS devices to start backup. D. During backup, files and directories on tapes are transferred to the backup server through the NDMP host on the LAN. The backup server generates indexes to maintain these files and directories. Answer: ABCD 91.A colleague suggests running SmartErase on several disks at once to make sure all dab is deleted. This is: A. Not possible, SmartErase can only be run on one disk at a time. B. Not possible, SmartErase is not run on disks but on FileSystems. C. Not possible, SmartErase is run on a LON, not by specifying an individual disk. D. Possible, but the demand on resources might be too high, E. Possible, it is a good solution to delete dab on multiple disks at once. Answer: C 92.What types are supported by SmartQuota of the OceanStor 5300 V3? (Multiple Choice) A. Hard quota B. Directory quota C. User quota D. User group quota Answer: BCD 93.Which of the following features are used for data migration solution? (Multiple Choice) A. SmartPartition B. SmartVirtualization C. SmartQuota D. SmartMigration Answer: BD 94.For OceanStor V3 SmartMigration function: The capacity of the target LUN can be smaller than that of the source LUN, as long as the available capacity is sufficient. 17 / 88

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A. TRUE B. FALSE Answer: B 95.Which of the following iSCSI connection modes is the most expensive but provides the best performance? A. NIC + initiator software B. TOE NIC + initiator software C. iSCSI HBA D. NIC Answer: C 96.Which of the following statements about the iSCSI protocol are correct? (Multiple Choice) A. iSCSI is an IP-based technical standard initiated by Microsoft. B. iSCSI enables users to access IP SANs. C. The iSCSI initiator encapsulates SCSI instructions and data into TCP packets for transmission. D. iSCSI is located between SCSI and TCP/IP. Answer: BCD 97.Which of the following statements is true? (Multiple Choice) A. Asynchronous replication has no real distance limitation. B. Asynchronous replication can be configured to use real-time replication. C. Synchronous replication can impact performance of the primary LUN. D. Synchronous replication supports two secondary LUN's. Answer: AC 98.What is the default port for Device Manager? A. 8008 B. 8080 C. 8088 D. 8888 Answer: C 99.The OceanStor Toolkit provides tools for: A. Batch upgrades B. Hardware replacements C. Real-time inspections D. Batch deployment E. All answers apply. Answer: E 100.Which functions are not provided by OceanStor ToolKit? A. Automatic fault repair B. Deploy 18 / 88

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C. Maintain D. Upgrade Answer: A 101.For OceanStor V3 HyperMirror: Mirror copy and Mirror LUN are two terms for the same concept. A. TRUE B. FALSE Answer: B 102.Which of the following are Fibre Channel network topologies? (Multiple Choice) A. Point-to-point B. Arbitrated loop C. Switched fabric D. Bridging Answer: ABC 103.To create two LUNs with each a different RAID level, hot spare policy, and a specific tiering policy, how many disk domains are required as a minimum? A. 2 B. 3 C. 4 D. None of the answers is true. Answer: A 104.Which of the following statements is true. A) SmartPartition and SmartQoS are mutually exclusive? B) SmartPartition and SmartQoS can be active in the same system, but not on the same LUN? A. Statement A is true and Statement B is false. B. Statement A is false and Statement B is true. C. Both Statements are true. D. Both Statements are false. Answer: D 105.Which of the following descriptions would apply to a storage array? (Multiple Choice) A. Is connected to a network using Fiber optic or copper cables. B. Contains at least one controller module. C. Has all critical components as redundant components. D. Storage arrays have their disks stored in external disk enclosures. Answer: ABC 106.SmartQoS can: (Multiple Choice) A. Improve performance for critical performance and services. B. Schedule I/O priority. C. Divide resources based on services. 19 / 88

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D. Guarantees resources for non-critical services. Answer: ABC 107.The filesystem snapshots created; (Multiple Choice) A. Are trad only, B. Can be mapped to a host. C. Can be used to create backups. D. Can be used to restore E. Require no additional space initially. Answer: ABCDE 108.A replacement controller includes how many new fan modules? A. 0 B. 1 C. 2 D. 3 Answer: A 109.In Huawei asynchronous remote replication, what is the minimum synchronization period achieved through multi-time-segment caching technology? A. 5s B. 5 min C. 3 min D. 3s Answer: D 110.What mechanism is used for I/O traffic control of SmartQoS to control traffic so as to achieve the performance control objectives for IOPS or bandwidth? A. SHA256 B. SHA1 C. Token bucket D. DHT Answer: C 111.Which of the following statements is true: (Multiple Choice) A. HyperMirror supports physical copies, B. HyperMirror can only be applied to LUNS on Huawei Storage Systems. C. HyperMirror is incompatible with other Value Added Features. D. A host can read data from either mirror copy. E. HyperMirror automatically creates a mirror copy. Answer: ADE 112.What are valid criteria in determining the performance requirements of a solution? (Multiple Choice) A. How many for Virtual Machines are needed. 20 / 88

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B. How many snapshots are needed. C. Synchronous or Asynchronous replication. D. Type of applications used. Answer: BCD 113.What command can be used on the CLI to view the status of the controllers in the OceanStor V3 storage systems? A. show controlinfo B. show controller general C. show sys D. show system general Answer: B 114.Can SmartDedupe and SmartCompression of the OceanStor 5300 V3 be used at the same time? A. Yes B. No Answer: A 115.Which of the following statements about SmartDedupe is true: A. SmartDedupe for File Systems only works on data that has already been written to disk. B. SmartDedupe for Block Systems only works on data that has already been written to disk. C. The calculations involved in deduplication should be offloaded to a separate processor. D. A file can be either deduped, or compressed. Not both. Answer: C 116.After replacing a disk module we check that the Alarm indicator is off, this guarantees that the module is placed correctly and functional. A. TRUE B. FALSE Answer: B 117.SmartVirtualization allows us to; (Multiple Choice) A. Use preconfigured settings on our storage system for VMware. B. Apply Huawei value added services to third party storage. C. Manage third party storage from a centralized management system. D. Use preconfigured settings on our storage system for Hyper-V. E. Migrate service dab form third party storage to our Huawei storage in combination with SmartMigration. Answer: BCE 118.SmartCache can support both SAN and NAS services. A. TRUE B. FALSE Answer: A

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119.What modes are supported by SmartQuota of the OceanStor 5300 V3? (Multiple Choice) A. Hard quota B. Soft quota C. Calculate quota D. File quantity quota Answer: AB 120.In the 2U enclosure models there is a separate BBU installed. A. TRUE B. FALSE Answer: B 121.To maintain consistency among LUN data mirrors, we; A. Use LUN copy and consistency groups. B. Use HyperReplication and consistency groups. C. Use SmartCopy and consistency groups. D. Use HyperSnap and consistency groups. Answer: B 122.Which of the following authentication modes is not supported by NFS? A. NIS domain B. LADP domain C. Host D. AD domain Answer: D 123.What is Oplock used for in the CIFS sharing? A. Oplock is a client caching mechanism that allows clients to dynamically decide when to send the server requests, so the network traffic and workload of the server can be minimized. B. To inform a client that the directory changes. C. To allow all users to access shares without authenticating their passwords. D. To save the access permission settings for all users or user groups, Answer: A 124.When RAID2.0+ is used, what is the default size of a chunk on a SAS disk? A. 256 MB B. 64 KB C. 512 MB D. 64 MB Answer: D 125.We can only configure a soft quota or a hard quota, not both. A. TRUE B. FALSE 22 / 88

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Answer: B 126.What type of cables is used to connect disk enclosures in the OceanStor V3 series? A. Optical fiber B. Serial cable C. Mini SAS HD cable D. 10G Ethernet cable Answer: C 127.Which of the following statements is true: (Multiple Choice) A. A link of 10 mbps can be used for Synchronous replication if Copy Speed is set to low. B. A link with a latency of 1ms is required for Synchronous replication. C. The maximum distance of Asynchronous Replication is unlimited, the maximum latency is not. D. A link of 100mbps (two way) is adequate for Synchronous Replication. Answer: BCD 128.What requirements must be met when configuring SmartPartition? (Multiple Choice) A. The minimum size of a read or write partition is 256 MB. B. A LUN or file system must belong to the same partition as its working engine. C. The minimum size of a read or write partition is 128 MB. D. A LUN or file system can belong to different partitions from its working engine. Answer: AB 129.What scale technologies are not supported by OceanStor 18500 V3? (Multiple Choice) A. SAS Scale-out B. IB Scale-up C. IP Scale-out D. PCIe Scale-out Answer: ABC 130.Which of the following statement about a Fibre Channel SAN is incorrect? A. It is applicable to critical data centers that require high performance, stability, and reliability. B. It uses the TCP/IP protocol, providing openness and cross-platform file system sharing. C. It uses a dedicated Fibre Channel network, which provides no security functions. D. It uses a complicated and expensive Fibre Channel network components and HBAs that require professional maintenance. Answer: B 131.During a Power Module replacement, we should consider the following; A. Decreased performance B. Cache processing capability C. Decreased reliability D. Service interruption E. Possible overheating of the other controller in a dual-controller setup. 23 / 88

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Answer: C 132.Which of the following is an SHA-256 algorithm? A. SMB1.0 B. SMB2.0 C. NFS3.0 D. NFS4.0 Answer: B 133.Which of the following state changes of a WORM filesystem require manual operation: (Multiple Choice) A. Locked to locked B. Locked to initial C. Initial to locked D. Initial to appending E. Appending to locked Answer: ACE 134.HyperSnap supports incremental synchronization. A. Yes B. No Answer: B 135.OceanStor V3 series storage systems support COW file systems. When new dab is written or data is changed, the original data will not be overwritten but the new data and data change id written into new allocated disk space. ROW file systems feature solid reliability and flexible scalability and become mainstream file systems such as ZFS, Btrfs, and nilfs. A. TRUE B. FALSE Answer: B 136.Under what conditions can SmartMigration relocate all services from the source LUN to the target LUN? (Multiple Choice) A. The target LUN is not smaller than the source LUN. B. The source and target LUNS belong to the same controller. C. The target LUN is not mapped to any host. D. The target LUN has no value-added services. Answer: ABCD 137.For tiering to work, the disk domain must; A. Be created with a single disk types. B. Be created with multiple disk types. C. Contain both SSDs and Hard disks. D. Contain multiple LUNs. 24 / 88

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Answer: B 138.Which of the following are common SAN networking modes? (Multiple Choice) A. IP SAN B. Fibre Channel SAN C. SAN D. iSCSI SAN Answer: AB 139.What scenarios can SmartVirtualization and SmartMigration be applied when they work together? (Multiple Choice) A. Heterogeneous dab migration B. Upgrade or replacement of storage systems C. Conversion from thick LUNS to thin LUNS D. Heterogeneous disaster recovery Answer: ABD 140.The common hardware faults of the OceanStor enterprise storage devices include: (Multiple Choice) A. Controller faults B. Disk faults C. RAID faults D. OceanStor Toolkit faults Answer: AB 141.The Log Management function of the OceanStor Toolkit allows us to filter events. A. TRUE B. FALSE Answer: A 142.Which SAN topology provides the highest reliability? A. Direct connection B. Dual-switch connection C. Single-switch connection D. All of the answers are correct. Answer: B 143.Which cable is used for connecting the InfiniBand I/O module? A. Cat 6 B. FDR C. Serial D. Mini SAS HD Answer: B 144.What are reasons that capacity will probably rise in the next few years? 25 / 88

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A. Audio/Video files have higher resolution. B. Data must be stored in different tiers, C. Virtualization plans. D. All the other answers are correct. Answer: D 145.The Huawei ACC module is not hot-swappable I/O module. A. TRUE B. FALSE Answer: A 146.With HyperMirror. To make use of dual write: A. Both the source and the target LUN must be mapped to the host B. The source LUN must be mapped to the host. C. The target LUN must be mapped to the host. D. Neither source nor target LUN must be mapped to the host, Answer: B 147.Which SAN components must be redundant to avoid single points of failure and to improve system reliability? (Multiple Choice) A. Switch B. Storage component C. I/O path D. Server cluster Answer: ABC 148.A colleague suggests using SmartMigration to improve write performance on certain LUNs. This is: A. Not possible in any situation. B. Possible in all situations. C. Possible in some situations. D. Only a temporary solution. Answer: C 149.In an OceanStor V3 populated with a number of SSDs, which of the following statements about SmartCache is/are true? (Multiple Choice) A. SmartCache uses partitions isolated from each other. B. In a situation with 4 controllers, SmartCache would create at least 4 SmartCache pools and 2 SmartCache partitions. C. SmartCache and SmartPartitioning are mutually exclusive. D. SmartCache and SmartQOS are mutually exclusive. A minimum of 1 SSD needs to be added to each SmartPartition. Answer: AB 26 / 88

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150.What is the minimum migration granularity of SmartTier and what is the default size? A. CK, 64 MB or 256 MB B. CK, 4 MB C. Extent, 4 MB D. Grain, 64 KB Answer: C 151.When can the use of SmartThin LUNS be considered? (Multiple Choice) A. For LUNS with unpredictable amounts of writes to them. B. When overprovisioning can easily be solved by adding disks quickly. C. If the amount of free space greatly exceeds the required LUN capacity. D. If the operating system supports re-thinning. Answer: BCD 152.When restarting an OceanStor V3 engine, we should: A. Make sure the power is off. B. Make sure no service is running on any of the controllers. C. Make sure a second device can take over all services. D. Make sure all disks are powered off. Answer: B 153.To ensure sufficient capacity for storing data, which types of capacity need to be planned? (Multiple Choice) A. SmartCache capacity. B. Capacity used by data base. C. Capacity used by file systems. D. Capacity used by system. Answer: BCD 154.Which of the following technologies can be used together with SmartPartition to increase cache read/write performance? (Multiple Choice) A. SmartQoS B. SmartCache C. SmartMemory D. SmartVirtualization Answer: AB 155.Users of HuaweiStorageSystem A are requesting higher performance for their OLTP application. The OLTP application is the only system using HuaweiStorageSystem A. A colleague suggests improving performance by running SmartQOS on the LUNS involved, while decreasing the performance of other services: This is; A. Not a solution to the problem, the other services will no longer work correctly. 27 / 88

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B. A solution, but not the best solution; SmartPartition would be better. C. A good solution for the problem; performance will improve. D. Not a solution for the problem, since there will be only one queue of I/O. Answer: D 156.Application Server X needs to access dab on StorageSystem X with multipathing software X and data on third-party StorageSystem Y with multipathing software Y. The combination of multipathing software is generating errors. A colleague suggests using SmartVirtualization to represent the data on third-party StorageSystem Y in an eDevLUN on StorageSystem X. This is: A. Not a solution to the problem, the multipathing software X will now generate errors. B. Not a solution to the problem, the data still resides on StorageSystem Y. C. A solution to the problem, we can remove the multipathing software Y once the eDevLUN is available. D. A solution to the problem, but only if we disable StorageSystem Y once the eDevLUN is available. Answer: C 157.For performance reasons it is often necessary to buy a lot of smaller capacity disk drives. A. TRUE B. FALSE Answer: A 158.For a storage pool you can change the hot spare policy in a later stage. A. TRUE B. FALSE Answer: B 159.The Forecast Analysis will show a graph announcing when the systems runs out of disk capacity. A. TRUE B. FALSE Answer: B 160.When a HyperMirror pair is synchronizing data, hosts can access dab on the mirror copies. A. TRUE B. FALSE Answer: B 161.Every OceanStor V3 model is fitted with at least 6 coffer disks. A. TRUE B. FALSE Answer: B 162.Data "write through" will generally be faster than Data "write back". A. TRUE B. FALSE 28 / 88

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Answer: B 163.All EXP port of OceanStor enterprise storage systems must connect to PRI ports. A. TRUE B. FALSE Answer: A 164.Which factors should be considered when planning basic services of a storage system? (Multiple Choice) A. Storage tier B. LUN clone C. RAID level D. Hot spare policy Answer: ACD 165.A host using an iSCSI HBA must be equipped with Initiator software to connect to a storage device. A. TRUE B. FALSE Answer: B 166.The number of disks in a storage pool can be changed in a later stage. A. TRUE B. FALSE Answer: B 167.A WORM file system cannot be deleted: (Multiple Choice) A. If any files are still under protection B. If any files are still locked C. If the WORM filesystem is not expired D. If the WORM file-tern is locked Answer: AC 168.The real-time inspection tool in the OceanStor Toolkit can tell us; A. The status of a link B. The bit errors on a link C. The status of the fans D. The power consumption of the device E. All of the above Answer: E 169.HyperMirror is a LUN based feature whereas SmartVirtualization is based on virtualizing a complete third party array. A. TRUE B. FALSE 29 / 88

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Answer: B 170.For two LUNs with each a different RAID level, hot spare policy, and a specific tiering policy, how many storage pools are required as a minimum? A. 1 B. 2 C. 3 D. 6 Answer: B 171.A filesystem snapshot: A. does replace the traditional backup in most cases. B. does not replace the traditional backup in most cases, C. replaces backup to tape in most cases. D. has no relation to the backup implementation at all. Answer: B 172.Huawei OceanStor V3 hardware offers Converged Storage which means every OceanStor V3 natively supports DAS and SAN. A. TRUE B. FALSE Answer: B 173.RAID penalty is important when calculating the actual performance of a number of disks. A. TRUE B. FALSE Answer: A 174.During a SmartMigration task. (Multiple Choice) A. Dual write prevents data loss B. Data is replicated from source to target LUN C. I/O to the source LUN is halted D. Services should be stopped to prevent data loss Answer: AB 175.A client served by an OceanStor 9000 requires that if one channel fails, data can be transmitted over another channel without service interruption. To address this requirement, a necessary condition is that the client support SMB 3.0. A. TRUE B. FALSE Answer: A 176.When the communication between MDC and OSD is interrupted or the OSD is faulty, the OSD exits the storage pool. Then the OSD out-of-service alarm is reported. 30 / 88

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Which of the following are the possible causes of this fault? (Multiple Choice) A. A storage network exception occurs. B. The disk in the server that houses the OSD is faulty. C. The NVDIMM in the server that houses the OSD is faulty. D. The OSD software is abnormal. Answer: ABCD 177.Based on full interconnection of data channels and communication channels, a clustered NAS system employs cluster volume management to manage storage space globally. All nodes in the cluster can access the same storage space using the same volume device name, ensuring block device access consistency. A. TRUE B. FALSE Answer: A 178.A NAS storage system supports file system sharing, and the underlying protocol transmits data based on iSCSI. A. TRUE B. FALSE Answer: B 179.Which of the following statements about multipart upload of object storage service are correct? (Multiple Choice) A. The object storage service (compatible with Amazon S3 APIs) limits the size of a single uploaded object to 5 GB. B. All uploaded parts are combined into one or more objects. The size of a combined object is not greater than 5 TB. C. For a large object, or the object that needs to be uploaded for several times, you can use multipart upload to complete the upload. D. After initiating a multipart upload task, you can cancel it. Answer: ACD 180.Users of object storage service (compatible with OpenStack Swift APIs) are managed and authenticated by the Keystone server. Registering, creating, and deleting an account must also be performed on the Keystone server. A. TRUE B. FALSE Answer: B 181.Which data protection levels can be configured for an OceanStor 9000 that consists of 10 nodes? (Multiple Choice) A. RAID 1 B. 6+3 C. 6+4 31 / 88

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D. 6+5 Answer: BC 182.The OceanStor 9000 allows the clients using different protocols to access the same directory or file simultaneously. For example, Windows clients (using the CIFS protocol), Linux clients (using the NFS protocol), and Mac OS X clients (using the CIFS protocol or NFS protocol). A. TRUE B. FALSE Answer: A 183.Which network file sharing protocols are supported by a NAS storage system? (Multiple Choice) A. FAT32 B. NTFS C. NFS D. CIFS Answer: CD 184.In an OceanStor 9000, if the protection level is set to 4+2, three mirrors of metadata will be generated. A. TRUE B. FALSE Answer: B 185.In Huawei OceanStor 9000, a file pool is a collection of files that have specific characteristics. A file pool policy defines rules for storing a file pool in a node pool. A. TRUE B. FALSE Answer: A 186.Administrators can use DeviceManager to quickly complete the initial configuration of an OceanStor 9000, including: (Multiple Choice) A. Setting an external DNS server B. Changing the password of the super administrator C. Setting the time zone and NTP for the system D. Setting InfoEqualizer (client connection load balancing) E. Setting alarm notification by email and SMS Answer: ABCDE 187.Compared with traditional RAID algorithms, the erasure code redundancy technology used by Huawei OceanStor 9000 provides higher reliability and more flexible redundancy policies. Which of the following statements about the erasure code N+M principle is false? A. Data to be written is divided into N data blocks of the same size. B. The erasure code algorithm calculates M parity blocks for every N consecutive data blocks. (The value of M is smaller than that of N.) 32 / 88

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C. N+M data blocks are concurrently stored to different disks. D. In erasure code storage mode, the storage system tolerates a concurrent failure of N disks at most. Answer: D 188.In which scenario, Huawei OceanStor 9000 does not start load balancing? A. Nodes are added. B. Disks are added. C. A disk goes offline three times within 10 minutes. D. A disk is about to fail. Answer: C 189.A customer purchases nine OceanStor 9000 storage nodes. During the deployment planning, the customer requires that data integrity be not affected if any three disks in a storage node are faulty, and the overall storage space utilization be not lower than 80%. Which of the following is the most proper redundancy ratio? A. 8+1 B. 6+3 C. 6+3: 1 D. 16 +3: 1 Answer: D 190.Which of the following statements about the cloud storage system are correct? (Multiple Choice) A. Huawei cloud storage system can only provide storage services for Huawei cloud platform and the users on the platform. B. Huawei cloud storage system can provide storage services for users on the VMware cloud platform. C. The OceanStor 9000 storage system will become a part of the cloud storage system. D. The OceanStor 9000 storage system surpasses the cloud storage system in scalability. Answer: BC 191.Which authentication modes are not supported by the CIFS sharing function of Huawei OceanStor 9000? (Multiple Choice) A. AD domain authentication B. DAP domain authentication C. Local authentication D. Global authentication E. NIS authentication Answer: BE 192.An OceanStor 9000 must be equipped with a minimum of three nodes that can vary in types. A. TRUE B. FALSE Answer: B 193.Which authentication modes are supported by the NFS service of Huawei OceanStor 9000? (Multiple 33 / 88

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Choice) A. AD domain authentication B. LDAP domain authentication C. Local authentication D. Global authentication E. NIS authentication Answer: BE 194.Which of the following statements about metadata on Huawei OceanStor 9000 is false? A. Huawei OceanStor 9000 stores metadata in mirrors. B. Metadata on each node is a complete and independent copy. C. Mirror storage aims to improve metadata security. D. Mirroring does not increase the metadata access rate. Answer: D 195.Which of the following is not the OceanStor 9000’s characteristics? A. The OceanStor 9000 adopts OceanStor DFS, Huawei-developed distributed file system, to store massive unstructured data and supports global namespace. B. The OceanStor 9000 provides object storage service compatible with Amazon Simple Storage Service (S3) APIs and OpenStack Swift APIs. C. The OceanStor 9000 supports interconnection with Fusioninsight Hadoop or Cloudera Hadoop which are developed from the open-source Hadoop components, helping users easily build an enterprise big data analysis platform. D. The OceanStor 9000 adopts distributed metadata management and supports linear expansion from three to 4000 nodes. Answer: D 196.Which of the following statements about Huawei OceanStor 9000 are true? (Multiple Choice) A. The MDS service manages file system metadata. B. The DS service stores file data but not metadata. C. The CMS service manages physical nodes in a cluster. D. Some nodes provide the MDS service, and some nodes provide the DS service. Answer: AC 197.Which of the following statements about the InfoStamper feature of Huawei OceanStor 9000 is false? A. Huawei OceanStor 9000 stores metadata in mirrors for redundancy, and uses the COW technique to ensure data reliability. B. The InfoStamper feature provides file-level snapshots. C. The InfoStamper feature employs the ROW technique. D. The advantage of ROW lies in the minor impact on system performance. Answer: B 198.What method is used by the OceanStor 9000 object storage service (compatible with Amazon S3) to store and search data? 34 / 88

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A. Directory tree B. DHT C. URL D. K-d tree Answer: C 199.Which of the following challenges is not faced by big data analysis? A. The traditional IT architecture cannot provide enough storage space for growing data. B. The traditional analysis methods are not suitable for big data. C. Massive data imposes higher requirements on fast, efficient, and real-time data analysis. D. The ability to provide a one-stop solution is required. Answer: A 200.Which of the following statements about InfoRevive is correct? A. InfoRevive ensures continuous availability of video surveillance services when the number of failed nodes or disks exceeds the upper limit. B. After the read fault tolerance mode is enabled, if the number of failed nodes or disks exceeds the configured upper limit, all the damaged video file data can be recovered. C. After the read/write fault tolerance mode is enabled, if the number of failed nodes or disks exceeds the configured upper limit, a specific proportion of damaged video file data can be recovered and data can still be written to the video file. D. InfoRevive is applicable not only to video surveillance scenarios, but also to TV stations and other media and assets industries. Answer: C 201.Compared with traditional RAID algorithms, the erasure code redundancy technology provides higher reliability and more flexible redundancy policies. Which of the following statements about the working principle of erasure code is false? A. Data to be written is divided into N data blocks of the same size. B. The erasure code algorithm calculates M parity blocks for every N consecutive data blocks. (The value of N is smaller than that of M.) C. N+M data blocks are concurrently stored to different nodes. D. In erasure code storage mode, a concurrent failure of M-1 disks is tolerated at most. Answer: D 202.Which are customer benefits provided by the InfoTier feature of Huawei OceanStor 9000? (Multiple Choice) A. The response to hotspot data access is faster, improving the storage performance. B. The cost advantages of different storage media are brought into full play, reducing deployment and maintenance costs. C. The storage performance is improved, and data is intelligently managed. D. Based on the mapping between file attributes and storage devices, files are automatically migrated, simplifying management and reducing management costs. Answer: ABCD 35 / 88

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203.Which of the following are the enhanced features of InfoTurbo? (Multiple Choice) A. Fixed prefetch B. Intelligent prefetch C. SMB3 Multichannel D. NFS protocol enhancement Answer: BCD 204.The following parameters are set for a user: The quota type is capacity quota, the quota type is forcible quota, the recommended threshold is 3 GB, the soft threshold is 4 GB, the hard threshold is 6 GB, and the grace period is 10 days. Which of the following is false? A. When the used storage space reaches 3 GB, the system does not report an alarm and the user is still allowed to write data. B. When the used storage space reaches 5 GB and more than 4 GB of storage space has been used for 11 days, the user is not allowed to write data. C. When the used storage space reaches 4 GB, the system reports an alarm, but the user is still allowed to write data within the grace period. D. When the used storage space reaches 6 GB, the system prevents data from being written. Answer: A 205.What is the minimum number of nodes required for deploying an OceanStor 9000 cluster? A. 2 B. 3 C. 4 D. 5 Answer: B 206.The InfoReplicator feature of Huawei OceanStor 9000 supports both synchronous and asynchronous remote replications. A. TRUE B. FALSE Answer: B 207.On Huawei OceanStor 9000, if access requests are not evenly allocated to nodes, a user can adjust zones. After that, the user must unmount shared directories from clients and remount directories based on allocated domain names. A. TRUE B. FALSE Answer: A 208.Huawei OceanStor 9000 storage system consists of multiple subsystems. Which subsystem is used for file storage? A. WushanFS 36 / 88

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B. WushanSQL C. Fusionlnsight Hadoop D. Management subsystem Answer: A 209.Huawei OceanStor 9000 uses the erasure code technology to protect data. A site has seven nodes, and the customer requires the disk utilization rate to reach 70%. Which redundancy levels can be used to meet the requirement? (Multiple Choice) A. 6+1 B. 4+2 C. 6+4 D. 12+2:1 Answer: AD 210.The InfoLocker feature of Huawei OceanStor 9000 can be used to meet the requirements of scenarios where data is written once and read multiple times. A. TRUE B. FALSE Answer: A 211.CIFS/NFS/FTP sharing implemented by Huawei OceanStor 9000 is intended for which object? A. Directories B. File C. Users D. User groups Answer: A 212.Which of the following is not the advantage brought by global cache? A. To improve cache space utilization. B. To improve the data hit ratio. C. To improve the overall system performance. D. To improve system security and reliability. Answer: D 213.CE6810-24S2Q-LI and CE6810-48S4Q-EI are stacked using high-speed cables to connect their high-speed Ethernet pore (for example, QSFP+ ports). A. TRUE B. FALSE Answer: B 214.Which file sharing interface is not provided by Huawei OceanStor 9000? A. Object B. NFS C. CIS 37 / 88

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D. FTP Answer: A 215.Which of the following statements about the InfoLocker feature of Huawei OceanStor 9000 is false? A. WORM files can be modified and deleted. B. A WORM clock can be set only once, and it cannot be modified later. C. If a directory is configured as a WORM root directory, all existing subdirectories as well as newly created subdirectories and files under the directory automatically obtain the WORM attributes of the directory. D. WORM protection can be submitted only in an automatic manner. Answer: A 216.In the InfoEqualizer feature provided by Huawei OceanStor 9000, a zone is a collection of nodes. Different zones are isolated and provide different services. Nodes in a zone have the same dynamic and static domain names as well as characteristics of automatic load balancing. A. TRUE B. FALSE Answer: A 217.A C72 node is a 4 U large-capacity archive storage node. It can be fully populated with 72 SAS disks to adapt to the scenarios that have demanding requirements for both performance and capacity A. TRUE B. FALSE Answer: B 218.Which functions are provided by InfoAllocator for OceanStor 9000 administrators? (Multiple Choice) A. Properly planning users B. Managing and monitoring users C. Collecting statistics and querying user information Answer: ABC 219.Which are characteristics of the NFS service provided by Huawei OceanStor 9000? (Multiple Choice) A. The NFS service is compatible with a wide range of operating systems, allowing file resource sharing in a heterogeneous network environment. B. If a node is faulty, client services served by that node will be quickly switched to another node, ensuring service continuity. C. The sharing service is provided by a cluster. Nodes in the cluster can monitor the service status of each other. D. Load balancing is implemented based on the states of services and nodes. Data access requests are evenly distributed in the cluster. E. Huawei OceanStor 9000 supports NFSv3 and NFSv4. Answer: ABCDE 220.Which of the following statements about the quota feature of Huawei OceanStor 9000 is false? 38 / 88

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A. Quotas can be set for users, B. Quotas can be set for user groups. C. Quotas can be set for directories. D. Quotas can be set for files. Answer: D 221.Among the OceanStor 9000 nodes, there is no need to consider IPMI management networking for C72 nodes. A. TRUE B. FALSE Answer: A 222.Which of the following statements about InfiniBand is false? A. InfiniBand features high bandwidth, low latency, and superb scalability. B. InfiniBand is often applied to connections between servers. C. InfiniBand will be widely promoted in the field of Internet network connectivity. D. Switches are basic components of an InfiniBand structure. Answer: C 223.In the big data era, all industries face challenges in processing. Which are challenges faced by the public security and criminal investigation fields? (Multiple Choice) A. It takes a long time to manually view numerous videos. B. Poor real-time analysis capability decreases the efficiency in solving a criminal case. C. A variety of image forma& decrease the query efficiency. D. Data is distributed, making data sharing difficult. Answer: ABCD 224.In OceanStor DFS, the MDS cluster arranges metadata of a file system in subtrees, and stores the subtrees on different nodes. A. TRUE B. FALSE Answer: A 225.Which of the following statements about the characteristics of Huawei OceanStor 9000 is false? A. Huawei OceanStor 9000 adopts a symmetric logical architecture and load balancing, greatly improving the capability to process concurrent access requests. B. Huawei OceanStor 9000 uses a global cache to store one copy of all data. C. Huawei OceanStor 9000 does not allow users to access OceanStor DeviceManager through HITPS. D. Huawei OceanStor 9000 supports smooth and linear expansion of capacity and performance. Answer: C 226.In OceanStor 9000 object storage, inter-node redundancy is implemented for metadata through mirroring. Each copy of metadata is independent and complete, improving metadata integrity and the performance of parallel access to metadata. 39 / 88

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A. TRUE B. FALSE Answer: A 227.Which are application scenarios of the InfoReplicator feature provided by Huawei OceanStor 9000? (Multiple Choice) A. Service disaster recovery B. Data distribution C. Data access at the secondary site Answer: ABC 228.Which of the following about the WushanFS global cache technology employed by Huawei OceanStor 9000 is false? A. WushanFS global cache enables the memory spaces on all storage servers to logically form a unified memory resource pool. B. Data cached on a node cannot be hit by the read/write service of another node. C. Global cache helps improve the sharing of memory resources among nodes. D. The WushanFS uses a distributed lock mechanism to implement global management of cached data. The same service data is cached only on one node. Another node that needs to access the service data can apply for a lock to obtain the cached data. Answer: B 229.If a third-party cabinet is used in the equipment room, which aspects must be checked? (Multiple Choice) A. Load bearing capability of the equipment room floor B. Cabinet parameters C. Power supply system of the cabinet Answer: ABC 230.Which of the following are the CMS cluster's functions? (Multiple Choice) A. Monitoring management B. Collecting logs C. Reporting alarms D. Upgrading firmware Answer: ABCD 231.The cloud storage system is a comprehensive storage system that features convergence, openness, and high flexibility. It supports pooling for hardware resources of different vendors and specifications and provides protocols and APIs required for the block, file, and object storage service. A. TRUE B. FALSE Answer: A 232.Which of the following statements about block storage management is incorrect? 40 / 88

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A. Administrators can view the volumes created by project users or administrators. B. Administrators can create, view, or delete block storage service levels. C. If the status of a volume fails to be updated in a timely manner, administrators can manually update the status. D. Storage resources are allocated to users through block resource pools. Administrators can view, modify, or delete resource pools. Answer: D 233.Huawei OceanStor 9000 uses the erasure code technology to protect data. A site has six nodes, and the customer requires that data can be restored if three of the disks where a stripe is distributed are faulty. Which redundancy levels can be used to meet the requirement? (Multiple Choice) A. 4+3:1 B. 6+3 C. 4+2 D. 6+4:1 Answer: AD 234.Which types of nodes are provided by Huawei OceanStor 9000? (Multiple Choice) A. High-performance storage node B. Large-capacity archive node C. Data storage node D. Data processing node Answer: AB 235.The municipal public security bureau of a city needs to periodically archive each police station's video surveillance data. If the solution provided by Huawei OceanStor 9000 is used in this scenario, which node type should be recommended? A. P12 node B. P24 node C. P36 node D. P72 node E. C36 node Answer: E 236.Which of the following statements about InfoTier node pools in Huawei OceanStor 9000 are true? (Multiple Choice) A. All nodes in a node pool must be of the same type. B. If an OPS-intensive application scenario, it is recommended that node pools consist of P nodes. C. A node pool that consists of P nodes must contain a minimum of three nodes. Answer: ABC 237.Which types of nodes are supported by Huawei OceanStor 9000? (Multiple Choice) A. P12 41 / 88

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B. P25 C. P36 D. C36 E. C72 Answer: ABCDE 238.Which of the following statements about data protection functions provided by Huawei OceanStor 9000 is false? A. Huawei OceanStor 9000 uses the erasure code technique to provide N+M redundant storage of data. B. Huawei OceanStor 9000 uses the mirroring technique to provide redundant storage of metadata. C. If physical domains are used, the failure of a disk or node in one domain will deteriorate the data reliability of other domains or even cause data loss. D. If the protection level is N+1, a cluster requires a minimum of three nodes. Answer: C 239.Huawei OceanStor 9000 uses the DFS to consolidate disk resources of all nodes, providing a unified namespace. A. TRUE B. FALSE Answer: A 240.Which is the automatic load balancing mode supported by the InfoEqualizer feature of Huawei OceanStor 9000 by default? A. By node connection count B. Round-robin C. By node throughput D. By comprehensive node load Answer: B 241.Which of the following statements about OceanStor 9000 hardware characteristics is incorrect? A. A P25 node is a 2 U high-performance storage device and applies to OPS-intensive applications. It has 25 front-end service disk slots and two back-end 2.5-inch system disk slots. B. All types of storage nodes support inserting one SSD in slot 0 as the read cache to improve system read performance. C. When the OceanStor 9000 is networked using IB switches, each node is equipped with 2-port IB network adapters, each of which provides two 40GE QSFP+ Ethernet optical ports to connect to the IB switches. D. A C72 node is a 4 U large-capacity archive storage node and applies to large-capacity applications. It has 72 service disk slots and four system disk slots. Answer: B 242.A storage cluster has five C72 nodes and adopts 10GE networks at the front and back ends. When distributed file system service and object storage service are both deployed on nodes, how many IP addresses should be planned for the front-end service network? 42 / 88

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A. 61 B. 71 C. 81 D. 91 Answer: D 243.Huawei OceanStor 9000 provides a unified service access domain name through which file system? A. NTFS B. HDFS C. CIFS D. EXT3 Answer: B 244.Which performance indicators are covered by the routine inspection of an OceanStor 9000 system? (Multiple Choice) A. Disk usage. B. CPU usage C. Memory usage D. Node throughput Answer: ABCD 245.Which designs improve the system reliability of Huawei OceanStor 9000? (Multiple Choice) A. N+M data protection B. Metadata mirroring C. Automatic fault detection and automatic data restoration D. Data scrubbing Answer: ABCD 246.Which advantages does Huawei OceanStor 9000 cluster NAS technology have over traditional NAS storage systems? (Multiple Choice) A. Rapid service switchover, preventing the failure of a single node in a cluster from affecting services B. Multi-node clustering, load balancing, and global cache, providing excellent performance C. Heterogeneous SAN storage can be connected to an engine cluster D. Scalable scale-out engine architecture Answer: ABD 247.Which of the following is not a typical application scenario of cloud storage? A. e-Government cloud B. Operation cloud C. Private cloud D. Policing cloud Answer: C 248.Huawei OceanStor 9000 can provide the SMB3 Multichannel function. 43 / 88

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A. TRUE B. FALSE Answer: A 249.In the software architecture of Huawei OceanStor 9000, the distributed object storage layer is built based on the distributed file storage layer. A. TRUE B. FALSE Answer: B 250.Which of the following statements about the CIFS sharing configuration of Huawei OceanStor 9000 is false? A. If Enable notify is selected, the changes made by a client to a directory cannot be detected by other clients that are accessing the directory or its parent directory. B. If Enable Oplock is selected, files are locally cached before being sent to the shared storage, improving clients' access efficiency. C. If Enable guest is selected, users can access shared directories on clients without entering a user name and password. D. If Signature enforcement is selected, clients are required to enable the signature function. If a client does not enable the signature function, the OceanStor 9000 rejects the data access requests initiated by that client. Answer: A 251.Which type of log is not supported by FusionStorage? A. Security log B. System log C. Monitoring log D. Operation log Answer: C 252.OceanStor 9000 object storage service (compatible with Amazon S3 APIs and OpenStack Swift APIs) provides RESTful APIs externally. Clients can store data to the storage nodes through the RESTful APIs. A. TRUE B. FALSE Answer: A 253.The permission priority of IAM Policy is determined according to the following rule: explicit deny > allow > default deny. A. TRUE B. FALSE Answer: A 254.Object storage implemented by the OceanStor 9000 Wushan file system is aimed at data but not at metadata. 44 / 88

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A. TRUE B. FALSE Answer: B 255.In Huawei OceanStor 9000, a node pool is a collection of nodes that have the same characteristics such as physical type and access performance, and dynamic storage tiering allows a user to group physical nodes in the same file system into different node pools. A. TRUE B. FALSE Answer: A 256.Which is not a necessary component of the NAS system architecture? A. Accessible storage array B. File system C. Service interface for accessing a file system D. Fibre Channel switch Answer: D 257.Which of the following statements about switches used with Huawei OceanStor 9000 is true? A. Switches used with Huawei OceanStor 9000 include CE6810, S5752/S5352, and IS5023. B. IS5023 switches provide IB access. C. S5700/S5352C switches provide 10GE access. D. CE6810 switches provide 10GE/GE access. Answer: D 258.Which sub-functions are included in the InfoProtector function provided by Huawei OceanStor 9000? (Multiple Choice) A. File data protection B. Snapshot C. WORM D. Metadata protection E. Data restoration F. Physical domain division Answer: ADEF 259.A customer plans to store a large number of files in a directory on an OceanStor 9000. Most of these files range from 64 KB to 128 KB. To improve disk utilization and read/write performance, which strip size should be set for the files in the directory? A. 16 KB B. 32 KB C. 64 KB D. 128 KB Answer: C 45 / 88

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260.Which of the following is not a software module at the adaption layer of the OceanStor 9000 DFS? A. OBS B. MDS C. PVS D. CA Answer: A 261.In Huawei OceanStor 9000, which authentication mode is not supported by NFS sharing? A. NIS authentication B. LDAP authentication C. Client IP address/host name authentication D. AD authentication Answer: D 262.Which of the following ports is used for firewall software upgrade and advanced debugging in SX6018? A. USB port B. I2C port C. Management network port D. Console port Answer: B 263.The InfoReplicator feature of Huawei OceanStor 9000 provides full synchronization and incremental synchronization. Incremental synchronization can be triggered manually or automatically. A. TRUE B. FALSE Answer: B 264.Huawei OceanStor 9000 can notify users of alarms by sending emails and short messages. A. TRUE B. FALSE Answer: A 265.Which of the following statements about the intelligent load balancing feature of Huawei OceanStor 9000 is false? A. Performance is balanced among all nodes. Capacity cannot be balanced among all nodes. B. Nodes can be grouped into zones. An independent load balancing policy and an independent domain name can be configured for each zone. C. Load balancing policies can be based on CPU usage, memory usage, bandwidth usage, node connection count, and/or node capability. D. Huawei OceanStor 9000 provides load balancing based on round robin, CPU usage, or node connection count. Answer: A 46 / 88

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266.Huawei OceanStor 9000 employs decentralization. Therefore, the Wushan distributed file system does not have performance bottlenecks. As the number of nodes increases, the storage capacity and the computing capability increase linearly, which in turn provides linearly increasing bandwidth and concurrency capabilities for users. A. TRUE B. FALSE Answer: A 267.Which of the following statements about quota and statistics is incorrect? A. When the bucket capacity reaches its quota, data cannot be written to the bucket. B. When the bucket capacity of an account reaches its quota, this account cannot write data to the bucket. C. The available bucket resources include the bucket size, the number of buckets, and the number of objects in the bucket. D. The available account resources include the account quota, the number of buckets, the number of objects, and the total capacity. Answer: C 268.NFS is a method of sharing disk files between UNIX operating systems. NFS is also a file system protocol that allows applications on a client to store and obtain data from server disks through a network. A. TRUE B. FALSE Answer: A 269.Which feature of Huawei OceanStor 9000 can provide file system snapshots? A. InfoLocker B. InfoStamper C. InfoProtector D. InfoEqualizer Answer: B 270.What key technologies are delivered by the OceanStor 9000 to improve the performance of object storage service? (Multiple Choice) A. Concurrent access B. SMB3 Multichannel C. High-speed interconnection D. SSD acceleration Answer: ACD 271.Which of the following are not the functions of OMS? (Multiple Choice) A. Alarm reporting B. Performance reporting C. Tenant management 47 / 88

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D. Device monitoring Answer: ABD 272.After the Hadoop service is interconnected with the OceanStor 9000 through the HDFS API, what data redundancy and protection mechanism is adopted? A. Duplicate mechanism B. Erasure Code C. RAID 2.0+ D. Cubic RAID Answer: B 273.Which of the following statements about the versioning for buckets are correct? (Multiple Choice) A. You can check whether the versioning is enabled by viewing its state. B. You can use versioning to save, query, and restore objects of different versions. C. The versioning state can be configured and queried. D. Versioning cannot be used to retain and archive data. Answer: ABC 274.Which quota types are supported by the InfoAllocator feature of Huawei OceanStor 9000? (Multiple Choice) A. Capacity quota B. File quantity quota C. Calculation quota D. Mandatory quota Answer: AB 275.What are the reasons for rapid development of the enterprise cloud storage? (Multiple Choice) A. Enterprises have strong demands on resource pooling, shortened product go-to-market time, and reduced cost. B. Storing service data to the cloud can reduce the possibility of misoperation and malicious theft compared to storing the data on the local PC. C. Enterprise cloud storage can help improve the performance and reliability of typical or new applications. D. For typical application scenarios such as VSI, VDI, and big data, enterprise cloud storage conserves more storage space, provides larger bandwidth, and enhances compatibility between virtual machines (VMs). Answer: ACD 276.Which module or device cannot be replaced by using the OceanStor 9000 FRU replacement tool? A. Power modules B. Disks C. Cables or optical modules D. I/O modules Answer: D 48 / 88

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277.Which of the following statements about CIFS are true? (Multiple Choice) A. CIFS transmits data based on TCP. B. CIFS transmits data based on UDP. C. CIFS is a file sharing protocol used in Linux. D. CIFS is a file sharing protocol used in Windows. Answer: AD 278.Before restriping, Huawei OceanStor 9000 determines whether the used space of the node pool in the target tier reaches the read-only watermark. Restriping is implemented only when the used space is lower than read-only watermark. A. TRUE B. FALSE Answer: A 279.Which of the following storage nodes are equipped with one SSD by default as the read cache? (Multiple Choice) A. P12 B. P25 C. C36 D. C72 Answer: AB 280.Which load balancing mode is not supported by the InfoEqualizer feature of Huawei OceanStor 9000? A. CPU usage B. User group C. Node-connections D. Node throughput Answer: B 281.Through project management, role management, and user management, FusionStorage file sharing authentication grants users permissions to access and use storage resources. A. TRUE B. FALSE Answer: B 282.Which of the following statements about Huawei OceanStor 9000 is false? A. Huawei OceanStor 9000 uses a non-symmetrical architecture, B. Huawei OceanStor 9000 supports seamless expansion of 3 to 288 nodes. C. Huawei OceanStor 9000 employs networking that features full interconnection and redundancy. D. Huawei OceanStor 9000 adopts a distributed cluster architecture without a single point of failure. Answer: A

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283.Neither online nor offline software version upgrade of Huawei OceanStor 9000 affects device management. A. TRUE B. FALSE Answer: B 284.Huawei OceanStor 9000 provides a single file system, offering a unified file system namespace. Which of the following statements about the unified file system namespace provided by Huawei OceanStor 9000 is false? A. During the startup of the OceanStor 9000, a namespace is automatically created and its name is the same as that of the OceanStor 9000. B. As the root directory of the entire system, a namespace cannot be shared or accessed. However, its subdirectories can be shared and accessed. C. The unified namespace provides a unified storage resource pool where storage space can be centrally managed and allocated. D. All shared directories are subdirectories in the unified namespace. Answer: B 285.Which software module is not included in the OceanStor 9000 product? A. OceanStor DFS B. VCS C. WushanSQL D. Fusionlnsight Hadoop Answer: B 286.A node of an OceanStor 9000 goes offline due to a power module failure and gets online again two days later. If the administrator does not manually restore data, the system automatically updates the data changes made during the offline period to the node. A. TRUE B. FALSE Answer: A 287.Which are characteristics of the FTP service provided by Huawei OceanStor 9000? (Multiple Choice) A. The objects shared by the FTP service are directories, and such a shared directory is accessible to multiple clients. B. Load balancing is implemented based on the states of services and nodes. Data access requests are evenly distributed in the cluster. C. The sharing service is provided by a cluster, Nodes in the cluster can monitor the service of each other. D. The FTP service is compatible with a wide range of operating systems, allowing file resource sharing in a heterogeneous network environment. Answer: ABCD 288.Which of the following statements about the erasure code N+M redundancy implemented by Huawei OceanStor 9000 is false? 50 / 88

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A. Different data protection levels can be set for different directories and files. B. Data written to an OceanStor 9000 is divided into chunks at a size of 4 GB C. The erasure code algorithm calculates M parity chunks for every N consecutive chunks. D. The utilization rate of storage space is about N/(N+M), and reliability is determined by M, where a larger value of M results in higher reliability. Answer: C 289.The OceanStor 9000 employs general-purpose x86 hardware to set up the scale-out NAS architecture. Relying on IB, 10GE, and PCIe networking, nodes deliver high concurrency and outstanding performance. Compared with the other two networks, the PCIe network has better scalability and is easier to manage. A. TRUE B. FALSE Answer: B 290.If a disk in an OceanStor 9000 stays offline for 15 minutes, the system obtains the data on the disk through calculations and then writes the data to other functional disks. A. TRUE B. FALSE Answer: A 291.Offline software version upgrade of Huawei OceanStor 9000 interrupts services. The service downtime varies depending on the upgrade duration. A. TRUE B. FALSE Answer: A 292.Which system resources can be managed by the InfoAllocator feature of Huawei OceanStor 9000? (Multiple Choice) A. Storage space B. Users C. Number of files D. User groups Answer: AC 293.In an OceanStor 9000, InfoAllocator is used to allocate 1 GB of hard capacity quota for directory A and 2 GB of hard capacity quota for subdirectory B under directory A. Which of the following statements are true? (Multiple Choice) A. A maximum of 2 GB data can be written into subdirectory B. B. A maximum of 1 GB data can be written into subdirectory B. C. A maximum of 2 GB data can be written into directory A. D. A maximum of 1 GB data can be written into directory A. Answer: BD

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294.S5752 or S5352 switches support AC power modules only. A. TRUE B. FALSE Answer: A 295.Which of the following concepts are used in object storage service (compatible with Amazon S3 APIs)? (Multiple Choice) A. Bucket B. Object C. Account D. User Answer: ABCD 296.Which of the following statements about big data processing technology are true? (Multiple Choice) A. Big data technology delivers more powerful processing capabilities, but leads to more complex management than traditional technology. B. Different from traditional data processing technology, big data processing technology processes data in various ways based on the data value. C. In the big data era, distributed parallel processing is employed to process data. This data processing technique features flexible component scalability, powerful data management capability, and unified management. Answer: ABC 297.InfiniBand can be used for communication between servers, between a server and a storage device, and between a server and a network. TRUE FALSE Answer: A 298.Which of the following statements is incorrect about the concepts used in object storage service (compatible with OpenStack Swift APIs)? A. As the owner and administrator of resources, an account can add, delete, query, and configure containers, and upload, download, and query objects. B. Objects represent data and can be regarded as files that can be accessed through the network. C. Containers can be nested, thereby avoiding complicated container structure. D. Containers store objects and can be regarded as directories that can be accessed through the network. Answer: C 299.Scale-out is a horizontal expansion architecture that addresses the needs and challenges produced by rapid data growth and complex data changes. Which are characteristics of the scale-out architecture? (Multiple Choice) A. Distributed processing B. Online expansion 52 / 88

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C. Data sharing D. Clustering Answer: ABCD 300.Which of the following statements about management ports on C72 nodes are correct? (Multiple Choice) A. When the OceanStor 9000 cluster contains only C72 nodes and the number of C72 nodes is not smaller than three, each controller module A of the first three nodes provides one NIC0 port as the management port. B. When the C72 nodes and the non-C72 nodes are deployed together, you can select C72 nodes to provide independent management network pots. C. When the C72 nodes and the non-C72 nodes are deployed together and applied to object storage service, only the node that provides independent management network ports can serve as an object storage management node. D. When deploying a storage cluster, you need to separately assign an IP address to port NIC0 on the C72 node in the cluster. Answer: AC 301.A NAS storage system is dedicated to storing and managing which data type? A. Big data blocks B. File data C. Small data blocks D. Consecutive data blocks Answer: B 302.Which of the following statements about intelligent load balancing implemented by Huawei OceanStor 9000 are true? (Multiple Choice) A. Load balancing automatically implemented among all nodes B. Automatic balancing of capacity and performance C. Free from manual intervention D. Transparent to applications Answer: ABCD 303.Which of the following are the APIs supported by HDFS Plugin? (Multiple Choice) A. Shell API B. API C. HTTP REST API D. Java API Answer: AB 304.Which are big data's characteristics defined by IDC? (Multiple Choice) A. Volume B. Variety C. Value 53 / 88

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D. Velocity Answer: ABCD 305.Huawei OceanStor 9000 is a storage platform that suits the characteristics of big data. The platform employs the scale-out architecture and uses hardware that adopts the general-purpose x86 architecture. A. TRUE B. FALSE Answer: A 306.An OceanStor 9000 is equipped with P36 nodes and adopts a 10GE back-end network. Which ports of P36 nodes must be connected to 10GE switches? (Multiple Choice) A. NIC0 B. NIC1 C. A0-0 D. B3-0 Answer: CD 307.Which of the following is not included in the FusionStorage network architecture? A. Management network B. Tenant network C. Cluster storage network D. Back-end storage network Answer: C 308.What functions do not accounts have? A. Basic account information management B. Certificate management C. Subscribed services management D. Cross-domain access policy management Answer: D 309.Which of the following statements about AK/SK authentication process is incorrect? A. When a user sends a data request, the OceanStor 9000 uses the hash-based message authentication code (HMAC) algorithm to encrypt SK and request content, and then generates a signature. B. After receiving the request and signature, the OceanStor 9000 uses AK to query SK. C. After SK is queried, the OceanStor 9000 uses the MD5 algorithm to encrypt SK and request content, and then generates a signature. D. The OceanStor 9000 compares the received signature with the one that calculated by the system. If the two signatures are consistent, the authentication succeeds, Answer: C 310.An OceanStor 9000 is equipped with six C72 nodes. How many nodes' NIC0 must be connected to the management network? A. 3 54 / 88

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B. 4 C. 5 D. 6 Answer: D 311.A storage cluster has five P36 nodes and adopts 10GE networks at the front and back ends. The front-end service network provides two 10GE ports. When distributed file system service and object storage service are both deployed on nodes, how many IP addresses should be planned for the front-end service network? A. 11 B. 21 C. 31 D. 41 Answer: C 312.The roadmap of big technology evolution is as follows: from distributed storage to cloud storage and from intelligent analysis to distributed analysis. A. TRUE B. FALSE Answer: B 313.When deploying FusionStorage file service, a customer deploys 10 FusionStorage nodes and two management network switches. In this scenario, how many IP addresses should be assigned for the management network? A. 12 B. 14 C. 16 D. 18 Answer: C 314.In the scenario where the front-end uses GE network, and the back-end uses 10GE network, how are ports connected to the networks? A. Ports A0-0 and A0-1 connect to the back-end 10GE network, and ports B3-0 and B3-1 connect to the front-end GE network. B. Ports A0-0 and A0-1 connect to the front-end GE network, and ports B3-0 and B3-1 connect to the back-end 10GE network. C. Ports A0-0 and B3-0 connect to the front-end GE network, and ports A0-1 and B3-1 connect to the back-end 10GE network. D. Ports A0-0 and B3-1 connect to the front-end GE network, and ports AD-1 and B3-0 connect to the back-end 10GE network, Answer: A 315.When maintaining an OceanStor 9000, it is recommended that the system administrator perform routine check on user accounts, including: (Multiple Choice) 55 / 88

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A. Checking and auditing logs about all user accounts' logins and operations B. Checking whether permissions of user accounts are proper C. Checking whether temporary user accounts have been deleted Answer: ABC 316.Which of the following statements about the bucket is incorrect? A. A bucket is a container for storing objects. It can be considered as a directory that can be accessed through the network. B. Buckets can be nested, thereby avoiding complicated container structure. C. The function of a bucket is similar to that of a container. Both of them can be accessed through the network. D. Lifecycle management of a bucket means automatically deleting objects from buckets after a certain period of time based on configuration rules without client intervention. Answer: B 317.OceanStor SystemReporter can be used to monitor an OceanStor 9000, including which resource objects? (Multiple Choice) A. Cluster B. Node C. Network port D. Disk E. Client Answer: ABCDE 318.How does HDFS Plugin store the Hadoop service data directly into the OceanStor 9000? A. HDFS Plugin is deployed on Hadoop nodes and is used to convert the HDFS protocol-based access requests to CIFS protocol-based access requests. B. HDFS Plugin is deployed on the Hadoop client and is used to convert the HDFS protocol-based access requests to NFS protocol-based access requests, C. HDFS Plugin is deployed on Hadoop nodes and the Hadoop client and is used to convert the HDFS protocol-based access requests to CIFS protocol-based access requests. D. HDFS Plugin is deployed on Hadoop nodes and the Hadoop client and is used to convert the HDFS protocol-based access requests to NFS protocol-based access requests, Answer: D 319.What is the process for interconnecting Cloudera Hadoop with the OceanStor 9000? 1. Prepare data. 2. Verify interconnection status. 3. Install HDFS Plugin on Cloudera Hadoop nodes and clients. 4. Migrate service data to the OceanStor 9000. 5. Configure NFS file sharing. A. 1>3>5>2>4 B. 1>3>4>5>2 C. 1>5>3>4>2 56 / 88

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D. 1>5>3>2>4 Answer: D 320.Which is the correct sequence for powering on an OceanStor 9000 storage system? A. Cabinet > switch > KVM > node B. Cabinet > KVM > switch > node C. Cabinet > switch > node > KVM D. Cabinet > node > KVM > switch Answer: A 321.To access OceanStor SystemReporter, enter https://IP:8088 in the address box of a web browser, where IP indicates the service management IP address of an OceanStor 9000. A. TRUE B. FALSE Answer: B 322.Which of the following statements about the CIFS protocol are true? (Multiple Choice) A. CIFS transmits data based on TCP. B. CIFS transmits data based on UDP. C. CIFS is a file sharing protocol used in Linux. D. CIFS is a file sharing protocol used in Windows. Answer: AD 323.Which of the following statement does not belong to the basic object operations? A. Create an object B. Delete an object. C. Encrypt an object. D. Copy an object. E. Obatin an object. Answer: C 324.Which of the following statements about client deduplication is false? A. At the source end, hash comparison and deduplication are implemented for the data blocks to be transmitted to the end. B. Compared with media deduplication, client deduplication can save the transmission bandwidth. C. Resources at the source end are consumed to implement deduplication. D. Only new data blocks need to be transmitted to the target end. Information related to old data blocks does not need to be transmitted. Answer: D 325.In the Huawei Active-Active DC Solution, SQL Server can provide services concurrently at both sites. A. TRUE B. FALSE Answer: B 57 / 88

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326.At which layers are the Active-Active DC Disaster Recovery Solution deployed? (Multiple Choice) A. Active-active storage layer B. Active-active database layer C. Active-active web and application layers D. Load balancing layer E. File system layer Answer: ABCD 327.In the Huawei Active-Active DR Solution, an application's peak write bandwidth is 10 MB's, average write bandwidth is 200 KB/s, average write I/O size is 4 KB, and the bandwidth usage is 70%. In this scenario, how large bandwidth is required for deploying asynchronous remote replication for the application? A. 10 MB/s B. 200 KB/s C. 2.23 MB/s D. 114.3 Mbit/s Answer: C 328.If a customer does not require high backup performance and the application type on production server is as the same as it on the management server, it is not necessary to deploy an independent media server in a data backup management system. Instead, a media server module can be installed together with a management server module on the same physical server. A. TRUE B. FALSE Answer: A 329.Which types of deduplication are supported by the Huawei OceanStor All-In-One Backup Solution? (Multiple Choice) A. Source-end deduplication B. Target-end deduplication C. Global deduplication D. Parallel deduplication Answer: AC 330.The disaster recovery feature of a storage system supports an RPO of 30 minutes and an RTO of 15 minutes. Then, which of the following statements are true? (Multiple Choice) A. If the storage system is faulty, there may be 30 minutes of data differences between the production site and the disaster recovery site. B. If the storage system is faulty, there may be 45 minutes of data differences between the production site and the disaster recovery site. C. It takes about 15 minutes to bring one or more applications back from an outage to a correct operational state. 58 / 88

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D. It takes about 45 minutes to bring one or more applications back from an outage to a correct operational state. Answer: AC 331.In Huawei OceanStor active-active disaster recovery solution, which of the following links can be used between data centers? (Multiple Choice) A. GE-WAN links B. Fibre Channel links C. 10GE links D. Private GE links Answer: BC 332.During data backup, data may be deduplicated to save space. For example, if data blocks A and B are the same, only one data block is physically stored, and the index corresponding to block A or B is deleted. A. TRUE B. FALSE Answer: B 333.DASH Copy is an optimized auxiliary copy technique. In each copy session, DASH Copy copies all data blocks from a source disk library to the target disk library. A. TRUE B. FALSE Answer: B 334.Which of the following statements about LAN-free and Server-free backup networking is true? A. During data backup, Server-free generates a copy that will be mounted to the backup server. B. Server-free backup networking can directly back up data to backup storage. C. LAN-free backup networking does not affect production hosts. D. The LAN-free data backup path is as follows: production storage > backup server > backup media. Answer: A 335.Which of the following is not covered by the backup policy management? A. Backup time B. Backup network C. Backup content D. Backup objective Answer: B 336.Before designing a backup solution, you must conduct surveys. Which aspects should be considered in a survey? (Multiple Choice) A. Project background B. Customer requirements C. Network environment 59 / 88

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D. Component selection Answer: ABC 337.What are the application maintenance principles of OceanStor backup solution? A. Ensure that the database archive mode is enabled B. Ensure that users' system space is sufficient C. Ensure that users' application environment information is correctly typed D. Ensure that users' applications meet interoperability matrix requirements E. Prevent DNS or Hosts file inconsistency Answer: E 338.Which of the following statements is correct about the Huawei asynchronous remote replication for LUN? 1. HyperReplication/A of the OceanStor V3 storage systems adopt the multi-time-segment caching technology. 2. HyperReplication/A of the OceanStor V3 storage systems adopt the snapshot technology. A. Statement 1 is false. Statement 2 is true. B. Statement 1 is false, Statement 2 is false. C. Statement 1 is true. Statement 2 is true. D. Statement 1 is true. Statement 2 is false. Answer: D 339.Which of the following statements about the working principles of data deduplication is false? A. The granularity of hash comparison is data block. B. Dab blocks that have been stored will not be stored again, and no other processing is required either, such as adding indexes. C. The same data block will be physically stored only once. D. A complete data logical view can be seen through indexes. Answer: B 340.What type of backup networking has the following features? 1. Occupies large network bandwidth; 2. Has restricted backup performance; 3. Adversely affects host applications. A. LAN-Base B. LAN-Free C. Server-Less D. Server-Free Answer: A

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341.Which of the following statements about the Huawei Network-Layer Mirroring Solution is correct? A. Only OceanStor storage devices can be deployed at the primary and secondary sites. B. At the primary site, only OceanStor storage devices can be deployed. At the secondary site, the third-party storage devices can be deployed, C. At the primary site, the third-party storage devices can be deployed. At the secondary site, only OceanStor storage devices can be deployed. D. The third-party storage devices can be deployed at both the primary and secondary sites. Answer: D 342.A remote replication consistency group is in normal state. Before initiating a primary/secondary switchover for that consistency group, which operation must be performed? A. Disable write protection at the secondary site. B. Change the restoration policy to manual. C. Split pairs. D. No operation is required. Answer: C 343.Deduplication is categorized as: (Multiple Choice) A. Media deduplication B. Client deduplication C. Partial deduplication D. Global deduplication E. Parallel deduplication Answer: ABDE 344.Which of the following statements are correct? 1. Backup can prevent misoperations and system issues. 2. DR can prevent production data loss in catastrophic data center failures. A. Statement 1 is false. Statement 2 is true. B. Statement 1 is false. Statement 2 is false. C. Statement 1 is true. Statement 2 is true. D. Statement 1 is true. Statement 2 is false. Answer: C 345.Huawei 3DC DR management network consists of the DR management network and production management network. The two networks must be separately deployed. A. TRUE B. FALSE Answer: B 61 / 88

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346.Which alarm securities are supported by OceanStor BCManager eReplication? (Multiple Choice) A. Message B. Info C. Warning D. Major E. Critical Answer: BCDE 347.Simpana consists of the MediaAgent, CommServe, and iDataAgent component. What is the sequence for upgrading these components? 1. MediaAgent 2. CommServe 3. iDataAgent A. 1 > 2 > 3 B. 1 > 3 > 2 C. 2 > 1 > 3 D. 3 > 1 > 2 Answer: C 348.What are the storage maintenance principles of OceanStor backup solution? (Multiple Choice) A. Ensure that indicators on controller enclosures, disk enclosures, controllers, and expansion modules work correctly B. Ensure that cables are correctly connected C. Prevent firewall faults by ensuring that default Simpana at least uses ports 8400 to 8402 D. Ensure that storage system performance is normal Answer: ABD 349.In a remote replication, the size of the secondary LUN on the disaster recovery storage system is larger than or equal to that of the primary LUN on the production storage system. A. TRUE B. FALSE Answer: B 350.Data replication technologies used for disaster recovery cannot be implemented on which layer? A. Host layer B. Storage layer C. Network layer D. Driver layer Answer: D 351.Suppose that the initial amount of backup data of an application is 500 GB, one full backup job and six incremental backup jobs are performed weekly, the retention period of all backup data is four weeks, and the redundancy percentage is 20%. 62 / 88

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In this scenario, how large back-end storage should be ready for the four-week data? A. 3320 GB B. 3504 GB C. 4380 GB D. 5256 GB Answer: D 352.Among the data replication technologies used for disaster recovery, host-layer data replication features good compatibility with servers and storage devices. A. TRUE B. FALSE Answer: A 353.Which of the following comprise the software architecture of the OceanStor Backup Solution? (Multiple Choice) A. Backup management node B. Backup media C. Backup service node D. Client E. Backup network Answer: ACD 354.Before deploying Huawei's active-active disaster recovery solution, information about the customer's network environment must be collected, including: (Multiple Choice) A. Information about the physical environment B. Information about business systems C. Network information D. Amount of data Answer: ABCD 355.Huawei OceanStor active-active disaster recovery solution supports heterogeneous storage, Therefore, an OceanStor V3 storage system and a Huawei certified third-party storage system can work in active-active mode through HyperMirror. A. TRUE B. FALSE Answer: B 356.Which of the following are Huawei Intra-City DR Solutions? (Multiple Choice) A. Active-Active DC Solution B. Active-Passive DR Solution C. Local HA Solution D. Geo-Redundant Solution Answer: AB

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357.When designing a backup solution, what factors must be considered? (Multiple Choice) A. Bandwidth and network B. Backup system migration C. Data and application restoration policy D. Capacity and storage policy Answer: ABD 358.Which of the following statements about backup policy formulation principles is incorrect: A. Determine data backup frequency based on the importance degree of data B. Determine the task execution time based on the amount of changed dab. C. Determine the data retention period based on the amount of dab. D. Determine backup media based on high IOPS Answer: D 359.Which of the following statements about Huawei OceanStor Backup Solution is false? A. Compared with disaster recovery, backup provides a finer restoration granularity, such as taking files as the restoration level and offering multiple backup points in time. B. If source data and backup data have the same format, a host can directly read and write the backup data. C. Backup software can back up data to tapes for offline archiving. Answer: B 360.Which of the following statements about remote replication consistency groups implemented by OceanStor V3 storage systems is false? A. All pairs in a consistency group are simultaneously synchronized f split, interrupted, or switched over. B. A consistency group ensures the time consistency of mirrored data among multiple LUNs. C. One consistency group can contain both synchronous and asynchronous remote replications. D. Regarding the remote replications in the same consistency group, all the primary LUNS must reside in the same storage array, and all the secondary LUNS must reside in the same storage array too. Answer: C 361.In a large backup domain, Simpana backup software ca n be used to set multiple CSs (CommServes) for load balancing to improve efficiency. A. TRUE B. FALSE Answer: B 362.The peak write bandwidth of an application is 10 MB's, the average write bandwidth is 200 KB's, and the average write IO size is 4 KB. The overhead of private information is about 11%, and the bandwidth utilization rate is 70%. The network employs FC, and the synchronous remote replication mode (considering the overhead of private information) is enabled. Then, which is the required network bandwidth? A. Not lower than 128.4 Mbit/s B. Equal to 128.4 Mbit/s 64 / 88

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C. Lower than 128.4 Mbit/s D. Not lower than 64.2 Mbit/s Answer: A 363.A customer plans to deploy an active/passive disaster recovery solution. The distance between the active and passive sites is about 1000 km. It is required that the RPO be shorter than 1 minute. In this case, asynchronous remote replication is recommended. A. TRUE B. FALSE Answer: A 364.Which of the following is the correct DR solution delivery process? a. Calculate storage capacity and bandwidth. b. Analyze the solution feasibility. c. Confirm the compatibility. d. Plan services. e. Design the networking. A. A > B > C > D > E B. B > C > A > E > D C. A > E > C > D > B D. E > B > A > D > C Answer: B 365.Is the Active-Passive DR Solution feasible for the scenario where the existing OceanStor S2200T V2 and third-party storage system are deployed in the two data centers separately? A. No. An Active-Passive DR Solution requires at least one set of OceanStor S2600T V2 or higher-level storage. B. No. An Active-Passive DR Solution requires at least one set of OceanStor 2600 V3 or higher-level storage. C. No. An Active-Passive DR Solution requires at least one set of OceanStor 5300 V3 or higher-level storage. D. Yes. All conditions required for the solution are met. Answer: D 366.LAN-base backup networking is one of the most common networking modes. Which are advantages of LAN-base backup networking? (Multiple Choice) A. The existing network is fully utilized, reducing costs. B. The performance of production hosts is not affected. C. The backup performance is good. D. Both control data and backup data are transmitted through the service network. Answer: AD 367.Is the Active-Active DR Solution feasible for the scenario where the existing third-party storage system and a newly purchased OceanStor 5300 V3 are deployed in the two data centers separately? 65 / 88

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A. No, An Active-Active DR Solution requires that two OceanStor 2600 V3 or higher-level storage devices be separately deployed in the two centers. B. No. An Active-Active DR Solution requires at least one set of OceanStor 5600 V3 or higher-level storage. C. No. An Active-Active DR Solution requires at least one set of OceanStor 5800 V3 or higher-level storage, D. Yes. All conditions required for the solution are met. Answer: A 368.The hardware-based snapshot of the OceanStor Backup Solution supports storage devices of all storage vendors. A. TRUE B. FALSE Answer: B 369.When configuring OceanStor BCManager eReplication, which of the following thresholds can be set? (Multiple Choice) A. CPU Usage B. Memory Usage C. Disk Usage D. Bandwidth Answer: ABC 370.In Huawei OceanStor Backup Solution, the backup data retention period is set to 15 days and the number of retention cycles is set to 2. Full backup is implemented once every 10 days. Then, after how many days of retention will backup data become invalid? A. 15 B. 20 C. 25 D. 30 Answer: B 371.Which of the following statements about the All-In-One Backup Solution are correct? (Multiple Choice) A. To support deduplication B. To support fine-grained recovery C. To support snapshot technology and the backup has no impact on services. D. To support report management Answer: ABD 372.In Huawei OceanStor Backup Solution, Huawei deduplication-based synthetic full backup can rapidly create and integrate full backups using indexes. A. TRUE B. FALSE 66 / 88

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Answer: A 373.Geo-Redundant Solution is implemented based on HyperMetro. A. TRUE B. FALSE Answer: B 374.Which of the following distance conditions meets the requirements of the Huawei Remote DR Solution? A. ≤ 20 km B. ≤ 40 km C. ≤ 60 km D. > 100 km Answer: D 375.In OceanStor V3 storage systems, remote replication allows a user to perform a primary/secondary switchover when the secondary LUN is in which data statuses? (Multiple Choice) A. Consistent B. Synchronized C. Initially synchronizing D. Synchronizing Answer: AB 376.Which of the following statements about data backup policies are true? (Multiple Choice) A. Each backup needs a full backup as the basis. B. Differential incremental backup minimizes the use of backup space. C. Differential incremental backup is used to back up data changes made between two backups. D. In the same scenario, synthetic backup outperforms incremental backup in terms of restoration time. Answer: ABCD 377.Which of the following backup media do not support deduplication? (Multiple Choice) A. S2600T B. OceanStor 2600 V3 C. OceanStor 5300 V3 D. OceanStor 2200 V3 Answer: AD 378.If an application is not included in the Huawei interoperability matrix, export the application data as a file and back up the file. A. TRUE B. FALSE Answer: A 379.Which of the following can be configured in the backup management system? (Multiple Choice) 67 / 88

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A. Backup network B. Backup time C. Hosts to be backed up D. Contents to be backed up E. Data backup Destination Answer: BCDE 380.Which of the following statements about backup type selection is false? A. If a schedule includes cumulative incremental backup but does not include full backup, all files are backed up in the first cumulative incremental backup. B. It is recommended that full backup, differential incremental backup, and cumulative incremental backup be used together to address backup needs. C. A backup policy uses a combination of full backup and differential incremental backup. If the system fails and the administrator wan& to restore the latest dab, data that is backed up through the latest full backup and all the differential incremental backups since the latest full backup is needed. D. Differential incremental backup saves storage space to the maximum and has a minimal backup window. Answer: B 381.Which backup mode is not supported by VADP? A. SAN B. NAS C. NBD D. Hot-Add Answer: B 382.For which scenario Huawei Active/Passive Disaster Recovery Solution is not suitable? A. To reduce costs, a customer configures entry-level storage products at the disaster recovery site. B. A customer requires zero RTO and RPO. C. A customer accepts disaster recovery technologies on the storage array layer. Answer: B 383.Suppose that 2080 GB data needs to be backed up from the production center to the disaster recovery (DR) center. How large bandwidth is required for meeting the backup demand under the condition that the backup window is 6 hours, no deduplication is performed, and bandwidth usage is 0.8? A. 49.28 MB/s B. 61.6 MB/s C. 98.56 MB/s D. 123.2 MB/s Answer: D 384.The scripts built in the Huawei OceanStor BCManager provide one-click fault recovery for VMware Server. 68 / 88

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Which operation is not included in the one-click fault recovery? A. Testing whether applications are successfully started B. Forcibly switching the replication relationship C. Starting disaster recovery D. Mapping LUNS E. Recovering product services Answer: E 385.In the Huawei Active-Active DR Solution, in which scenario must optical fibers be used for connection? A. The distance between two data centers is shorter than 25 km, and the required number of optical fibers is smaller than 4 pairs. B. The distance between two data centers is longer than 25 km, and the required number of optical fibers is greater than 4 pairs. C. The distance between two data centers is longer than 25 km, and the required number of optical fibers is smaller than 4 pairs. D. The distance between two data centers is shorter than 25 km, and the required number of optical fibers is greater than 4 pairs. Answer: C 386.HyperMetro uses cross-site real-time data mirroring to ensure real-time data synchronization between the storage arrays at two sites. Upon receiving a write I/O, the storage array in a data center generates a write log. In the log, only address information is recorded, but data is not recorded. To ensure performance, log information is recorded in memory space capable of power failure protection. A. TRUE B. FALSE Answer: A 387.Which of the following statements about the HyperMetro quorum server mode are true? (Multiple Choice) A. If one storage system and the quorum server are faulty, the remaining storage system continues to run services. B. When heartbeats between two storage systems are lost, the two storage systems send arbitration request to the quorum server. Then, the quorum server determines the winner. The winner continues to provide services while the other storage system stops services. C. Services are not affected when the arbitration fails and the heartbeat links between storage systems are interrupted, D. If you have arbitration preference, you can also configure priorities for the sites. Answer: BD 388.In Huawei Data Protection Solutions, faults are classified into logical errors, device faults, center faults, and regional disasters. What type of faults incur the greatest loss? A. Logical errors 69 / 88

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B. Device faults C. Data center faults D. Regional disasters Answer: D 389.Which of the following statements about the HyperMetro static priority mode are true? (Multiple Choice) A. If links between sites are down or the non-preferred site fails, LUNS at the preferred site continue to provide services and those at the non-preferred site stop providing services. B. If the storage system at the preferred site is faulty, the non-preferred site automatically takes over active-active services. C. If a user powers off the storage system at the preferred site for maintenance purposes, the storage system at the non-preferred site immediately takes over all active-active services without service interruption. D. The static priority mode provides higher reliability than the quorum server mode. Answer: AC 390.Which of the following technologies are used in the Huawei HyperVault DR Solution? (Multiple Choice) A. Mirror B. Snapshot C. Remote replication D. eReplication Answer: BC 391.In the HyperMetro active-active data center solution, before configuring active-active pairs, a user must configure an active-active domain. As a logical concept, an active-active domain contains the two storage arrays that require an active-active relationship and a quorum server. A. TRUE B. FALSE Answer: A 392.During the CommServe installation, if the CS resides in the same network segment as Agent, there is no need to configure the hosts file. A. TRUE B. FALSE Answer: B 393.Suppose that the amount of data is 2000 GB at site A and is 3000 GB at site B, and the deduplication ratio is 3. If the data at site B needs to be remotely replicated to site A, how large back-end storage should be? A. 2000 GB B. 3000 GB C. 4000 GB 70 / 88

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D. 5000 GB Answer: B 394.In which scenarios can OceanStor BCManager eReplication be used? (Multiple Choice) A. Active-passive DR B. Geo-redundant DR C. HyperMetro DC D. Local HA Answer: ABCD 395.Which of the following customer benefits is not provided by the snapshot-based backup function of Huawei storage systems? A. Shortens the backup window. B. Reduces the amount of backup data to be transmitted and stored. C. Does not affect applications. D. Reduces the costs. Answer: B 396.Which applications can be protected by OceanStor BCManager in Huawei Active/Passive Disaster Recovery Solution? (Multiple Choice) A. Oracle B. VMware C. FusionSphere D. SQL Server Answer: ABCD 397.In the Cascading Replication DR Solution, the synchronization + asynchronization and asynchronization + asynchronization modes are both supported. A. TRUE B. FALSE Answer: A 398.Which of the following statements about OceanStor BCManager eReplication are correct? 1. The version of JRE installed in the maintenance terminal where the eReplication client resides is 1.2.0_51 or later. 2. The eReplication client requires a trusted code signature. A. Statement 1 is false, Statement 2 is true. B. Statement 1 is false. Statement 2 is false, C. Statement 1 is true. Statement 2 is true. D. Statement 1 is true. Statement 2 is false. 71 / 88

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Answer: A 399.In OceanStor backup solution, iDA types include basic module (file system), online application backup module (including Oracle and SQL) and index cache. A. TRUE B. FALSE Answer: B 400.The Disaster Recovery Data Center Solution (Active-Active Mode) can be upgraded to the Disaster Recovery Data Center Solution (Geo-Redundant Mode), but needs extra devices. A. TRUE B. FALSE Answer: B 401.If a large amount of data needs to be backed up, the all-in-one deployment scheme is recommended, instead of the separate deployment scheme. A. TRUE B. FALSE Answer: B 402.Regarding Huawei OceanStor Backup Solution, which are characteristics of global repository cells? (Multiple Choice) A. Multiple backup domains are centrally managed. B. Simplifying backup domain management. C. The backup duration is reduced. The backup has no impact on services. Data can be recovered in seconds. D. Reducing O&M costs by 50%. Answer: ABD 403.Which function is not supported by a backup service node? A. To transfer data between the client and backup management node B. To maintain the index information and index cache information about all jobs on the service node C. To write the job index information and backup task into the media D. To write backup software data and read recovery data Answer: A 404.In the Huawei Active-Active DC Solution, Oracle RAC can provide services concurrently at both sites. A. TRUE B. FALSE Answer: A 405.Which of the following statements about splitting a remote replication is true? A. A remote replication can be split only on the primary storage system. B. A remote replication can be split on the primary storage system or the secondary storage system. 72 / 88

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C. A remote replication can be split only on the secondary storage system. D. After being split on the primary storage system, a remote replication must be split manually on the secondary storage system too. Answer: B 406.Huawei Active-Passive DR Solution can not support heterogeneous storage resources. A. TRUE B. FALSE Answer: B 407.In a VMware backup scenario, if a non-SAN transmission mode is used, backup data is transferred from production storage to VSA by the EXS host, and is written to backup storage by MA. A. TRUE B. FALSE Answer: A 408.Huawei's end-to-end active-active data center solution is divided six layers, including: A. Storage layer, session layer, application layer, network layer, transfer layer, and physical layer B. Storage layer, session layer, application layer, network layer, transfer layer, and security layer C. Storage layer, computing layer, application layer, network layer, transfer layer, and security layer D. Storage layer, computing layer, application layer, network layer, transfer layer, and physical layer Answer: C 409.Which are possible causes for an enterprise to use virtual tape libraries as the backup media? (Multiple Choice) A. The original tape storage system architecture does not need to be changed. B. The capacity scalability is better than that of physical tape libraries. C. The initial cost of unit storage is lower than that of physical tape libraries. D. The read and write performance is higher than that of physical tape libraries. Answer: AD 410.In data backup scenarios, which of the following statements about optical discs is false? A. Applicable to the scenarios that do not require a high backup speed B. Applicable to the scenarios that require a large backup capacity C. Applicable to the scenarios where data is seldom erased D. Data can be stored for a long period of time. Answer: B 411.In data backup scenarios, which are characteristics of disk backup devices, compared with physical tape libraries? (Multiple Choice) A. The backup and restoration performance is high. B. The management and maintenance costs are low. C. Disks where data is stored can be separated from the device that reads and writes data to these disks, implementing offline storage of data 73 / 88

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D. The unit storage cost of a disk is lower than that of a physical tape. Answer: AB 412.Local HA Solution is implemented based on HyperMetro. A. TRUE B. FALSE Answer: B 413.What are the advantages of parallel deduplication? (Multiple Choice) A. To provide PB-level data backup B. Outstanding performance C. Superb reliability D. Large scale Answer: ABCD 414.Which of the following are Huawei DR Solutions? (Multiple Choice) A. Active-Active DC Solution B. Active-Passive DR Solution C. Local HA Solution D. Geo-Redundant Solution Answer: ABCD 415.Backup system components include backup management system, backup client, backup network, and backup media. Common backup network modes include SAN-free and NAS-free. A. TRUE B. FALSE Answer: B 416.Which of the following statements about global deduplication is false? A. Deduplicated copy in different storage policies uses the same DDB, B. Deduplicated copy in different storage policies uses the same disk library and deduplication attributes. C. Deduplicated copy in different storage policies uses the same deduplication pool as the backup target. D. Different storage policies must adopt the same backup data retention period. Answer: D 417.Physical tape libraries have the following disadvantages: The mechanical failure rate is relatively high, and tapes are vulnerable to the adverse impact of the environment (temperature, humidity, and dusts). A. TRUE B. FALSE Answer: A 418.To create mirrors for heterogeneous storage arrays in the Huawei Local HA Solution, which of the following features must be used together with HyperMirror? A. HyperMirror 74 / 88

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B. SmartVirtualization C. HyperClone D. HyperReplication Answer: B 419.Parallel deduplication provides PB-level data backup to common disks. The processing speed and data capacity can increase linearly as the number of nodes in the deduplication grid grows. A. TRUE B. FALSE Answer: A 420.Which type of backup networking's working process is like the following: 1. A snapshot volume is created for a data volume that you want to back up. 2. The backup server backs up the data on the snapshot volume to the backup device. A. LAN-Base B. LAN-Free C. Server-Less D. Server-Free Answer: D 421.Which of the following statements about deploying Huawei active-active data centers are true? (Multiple Choice) A. The storage layer does not support the following practice: One OceanStor V3 storage system takes over LUNS from a third-party storage system. Then, a third-party LUN and a LUN on another OceanStor V3 storage system form active-active LUNs. B. On the network layer, at least two independent GSLBs must be deployed at each site for load balancing between the two sites. C. Quorum software can be installed on a physical server or a virtual machine. The quorum server is connected to the two storage arrays in the active-active data centers over an IP network. D. The transmission layer uses Huawei OptiX OSN series DWDM devices. Two wavelength division devices are deployed at each site. Answer: CD 422.In the HyperMetro active-active data center solution, if a member LUN has bad blocks, which of the following statements is false? A. Before repairing bad blocks, the read permission must be obtained and the local read permission for active-active pairs must be confirmed. B. If irreparable bad blocks are read from a local LUN, a read error message is returned to the host. C. If repairable bad blocks are read from a local LUN, data is returned to the host, ensuring fast host response. D. If irreparable bad blocks are read from a local LUN, the system uses data stored on the remote LUN to repair these bad blocks. Answer: B

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423.Which of the following features is used to achieve the Huawei Geo-redundant DR Solution? A. HyperMirror B. HyperMetro C. HyperClone D. HyperReplication Answer: D 424.Suppose that a customer that adopts the Huawei Network-Layer Full-Sized Snapshot Solution creating a snapshot for the source volume at 9:00 am, and the snapshot finishes being created at 9:10 am. During the snapshot creation, some data is written to the source volume. Based on the preceding conditions, which of the following statements is correct? A. Data in the snapshot volume is the same as that in the source volume at 9:00 am, B. Data in the snapshot volume is the same as that in the source volume at 09:10 am. C. Data in the snapshot volume is the incremental data generated during 9:00 am to 9:10 am in the source volume. D. The snapshot volume is a physical copy of the source volume generated at 9:00 am. Answer: A 425.In Huawei OceanStor disaster recovery solutions, which is the major difference between synchronous remote replication and asynchronous remote replication? A. OPS B. RPO C. IOPS D. Costs Answer: B 426.Which are advantages provided by parallel deduplication? (Multiple Choice) A. High performance B. High reliability C. Large scale Answer: ABC 427.The process for designing a backup solution is divided into multiple phases. Which is the correct sequence? A. Requirement analysis and information collection > Backup and archive policy design > Bandwidth and network design B. Capacity and storage policy design > Backup and archive policy design > Backup system migration design C. Backup system migration design > Capacity and storage policy design > Bandwidth and network design D. Capacity and storage policy design > Backup and archive policy design > Design of other features Answer: A 428.File-level deduplication is also known as single instance storage (SIS). Based on indexes, file-level 76 / 88

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deduplication checks and compares the attributes of a file that needs to be stored with those of files that have been stored. If the file has not been stored, file-level deduplication stores the file and updates indexes, Otherwise, file-level deduplication only stores the pointers that point to the existing file. A. TRUE B. FALSE Answer: A 429.What information must be collected before deploying a DR solution? (Multiple Choice) A. Production system B. Network C. DR object D. Data volume Answer: ABCD 430.Before implementing a disaster recovery solution, which network environment information must be collected? (Multiple Choice) A. Production device B. Disaster recovery object C. Network information D. Amount of data Answer: ABCD 431.Which of the following statements are correct about Huawei Local HA Solution that uses HyperMirror? (Multiple Choice) A. Only the Huawei OceanStor V3 series can directly connect to hosts. B. The Huawei OceanStor V3 series and the heterogeneous storage arrays all can directly connect to hosts. C. The heterogeneous storage arrays cannot directly connect to hosts. D. The heterogeneous storage arrays can directly connect to hosts. Answer: AC 432.Which of the following statements about media deduplication is false? A. Data blocks are transmitted from the source end to the target end and then deduplicated at the target end. B. Media deduplication does not consume resources at the source end. C. Media deduplication is equivalent to post-processing deduplication. D. Media deduplication does not save the transmission bandwidth. Answer: C 433.Which of the following statements about the backup domain of the OceanStor Backup Solution are incorrect? A. One or more MediaAgent components can be installed in a backup domain. B. One or more iDataAgent components can be in a backup domain. C. One or more CommServe backup management nodes can be installed in a backup domain. 77 / 88

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D. One or more can be installed in a backup domain. Answer: C 434.In the HyperMetro active-active data center solution, which of the following statements about the static priority mode used for brain-split prevention is false? A. If the storage system at the preferred site is faulty, the non-preferred site automatically takes over active-active services. B. If a user powers off the storage system at the preferred site for maintenance purposes, the storage system at the non-preferred site immediately takes over all active-active services without service interruption. C. If links between the storage systems are down, LUNS at the preferred site continue to provide services and those at the non-preferred site stop providing services. D. If the non-preferred site fails, LUNS at the preferred site continue to provide services while LUNS at the non-preferred site stop providing services. Answer: A 435.Does the Active-Passive Synchronous Replication DR Solution meet the requirements of RPO and RTO = 0? A. No. This solution's RTO is greater than 0. B. Yes. C. No. This solution's RPO is greater than 0. D. No. This solution's RTO and RPO are both greater than 0. Answer: C 436.Which is not one of the three elements in information survey of Huawei Active/Passive Disaster Recovery Solution? A. Project background B. Customer requirements and summary C. Project implementation plan D. Network environment information Answer: C 437.In data backup scenarios, which are characteristics of physical tape libraries? (Multiple Choice) A. Data can be remotely stored in an offline manner for a long term. B. The capacity scalability of a physical tape library is better than that of a disk system, C. The backup and restoration performance is relatively low. D. The management and maintenance costs are low. Answer: ABC 438.An enterprise wants backup to consume only a small amount of storage space and a minimal backup window. In this case, which backup type is most recommended? A. Full backup B. Full backup + Cumulative incremental backup 78 / 88

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C. Full backup + Differential incremental backup D. Cumulative incremental backup + Differential incremental backup Answer: C 439.Which of the following components are required for the Huawei Active-Active DR Solution? (Multiple Choice) A. HyperMirror B. Quorum server C. UltraPath D. HyperMetro Answer: BCD 440.Which of the following statements about client deduplication and media deduplication are true? (Multiple Choice) A. Client deduplication is implemented as follows: At the source end, hash comparison is performed for data blocks to be transmitted. If a data block has been transmitted, only the corresponding hash index value will be transmitted. B. In terms of media deduplication, in-line processing provides higher data transmission performance than post processing. C. Media deduplication saves bandwidth resources and does not consume resources at the source end. D. Client deduplication consumes resources at the source end but saves bandwidth resources. Answer: AD 441.In terms of configuring active/passive disaster recovery, which condition the LUNs on the primary and secondary storage systems must meet? A. A secondary LUN must have a larger size than or the same size as the primary LUN. B. A secondary LUN must have the same size and RAID level as the primary LUN. C. The secondary LUN only needs to have the same size as the primary LUN. D. The secondary storage system must be equipped with the same types of disks as the primary storage system, and a secondary LUN must have a larger size than or the same size as the primary LUN. Answer: C 442.Which is the correct process for installing CommServe? A. Install the .NET Framework. > Select a proper firewall configuration. > Install databases. > Configure DR paths, B. Select a proper firewall configuration. > Install the .NET Framework. > databases, > Configure DR paths. C. Install the .NET Framework. > Select a proper firewall configuration. > Configure DR paths. > Install databases: D. Install the .NET Framework. > Install databases. > Select a proper firewall configuration. > Configure DR paths. Answer: A 443.Is the Active-Active DR Solution feasible for the scenario where the bandwidth for the quorum server 79 / 88

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to the primary and secondary storage systems is 4 Mbit/s, RTT is not greater than 40 ms, and the packet loss rate is not greater than 1%? A. No. The bandwidth cannot be smaller than 10 Mbit/s. B. Yes. All conditions required for the solution are met. C. No. The packet loss rate cannot be greater than 0.1%. D. No. The latency cannot be larger than 20 ms. Answer: C 444.What components does the backup system consist of? (Multiple Choice) A. Backup management system B. Backup media C. Backup client D. Backup software Answer: ABC 445.Which function is not supported by a backup management node? A. To maintain configuration information about all components (including clients, media agents, and backup devices) B. To maintain and manage user permissions and software licenses C. To manage all records of jobs and historical task records D. To maintain index information of backup media E. To provide web and GUI services Answer: D 446.Which of the following statements about the OceanStor Backup Solution are correct? (Multiple Choice) A. A backup management system mainly consists of backup software and a backup management server. B. The backup solution involves the central, branch, and remote DR sites. C. Web-based management is not supported. D. Backup nodes and backup storage media are separated from each other. Answer: AB 447.Active-Active Solution is implemented based on HyperMetro. A. TRUE B. FALSE Answer: A 448.When configuring a backup data retention policy, you must consider the retention period, retention cycles, and number of write streams. A. TRUE B. FALSE Answer: B 449.What operating systems are supported by OceanStor BCManager eReplication? (Multiple Choice) 80 / 88

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A. Windows B. Linux C. AIX D. HP-UX E. Solaris Answer: ABCE 450.Which of the following statements is correct about the Huawei DR Solution where Huawei remote replication is used and consistency groups are created? A. If data on one of the LUNS is unavailable, data on the other LUNS is also unavailable. B. If data on one of the LUNS is unavailable, data on the other LUNS is available. C. A maximum of four pairs of consistency groups is supported. D. A consistency group can include LUNS and file systems. Answer: A 451.Which of the following statements about snapshot backup are correct? (Multiple Choice) A. The backup duration is reduced B. The backup has no impact on services C. Multiple backup domains are centrally managed D. Data can be recovered in seconds Answer: ABD 452.Huawei storage products implement the active/passive data center solution based on HyperMetro. Applications are categorized so that some applications are running in data center A and hot backed up in data center B while other applications are running in data center B and hot backed up in data center A, thereby achieving the active-active effect. A. TRUE B. FALSE Answer: B 453.Which of the following are Huawei remote DR Solutions? (Multiple Choice) A. Active-Active DC Solution B. Active-Passive DR Solution C. Local HA Solution D. Geo-Redundant Solution Answer: BD 454.Which are characteristics of Huawei cloud storage? (Multiple Choice) A. The deployment is easy for end users. B. The investment is low for end users. C. The network cost for backing up data to cloud storage is low. D. Capacity expansion is easy. Answer: ABD

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455.What type of deduplication does the following describe? Dab blocks are directly stored to the cache when the system is busy and will be deduplicated during off-peak hours. The advantage is that data transmission performance is not affected. The disadvantage is that the extra storage space is required. A. Inline deduplication B. Post-processing deduplication C. Parallel deduplication D. Global deduplication Answer: B 456.Which of the following statements about asynchronous remote replication implemented by OceanStor V3 storage systems is false? A. The primary storage system returns a write success response to the host immediately after data is successfully written to the primary LON. B. After an asynchronous remote replication relationship is established, an initial synchronization is implemented. C. When a secondary LUN is added to an asynchronous remote replication, snapshots of the primary and secondary LUNS are automatically created and activated. Answer: C 457.If a customer requires both the RTO and RPO to be 0, which disaster recovery solution is most recommended? A. Active/passive B. Active-active C. 3DC D. Cloud disaster recovery Answer: B 458.Which of the following statements about synchronous remote replication of the Huawei Active-Passive DR Solution is correct? A. The link distance between the two data centers cannot be longer than 100 km, and the round-trip transfer latency cannot be longer than 4 ms. B. The link distance between the hN0 data centers cannot be longer than 200 km, and the round-trip transfer latency cannot be longer than 2 ms. C. The link distance between the two data centers cannot be longer than 300 km, and the round-trip transfer latency cannot be longer than 8 ms. D. The link distance between the two data centers cannot be longer than 150 km, and the round-trip transfer latency cannot be longer than 2 ms. Answer: B 459.When OceanStor BCManager is used to test disaster recovery switchover and switchback, the storage system at the production site and that at the disaster recovery site must support the snapshot feature. A. TRUE 82 / 88

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B. FALSE Answer: A 460.What are cloud storage's disadvantages when it serves as backup media? A. Capacity is difficult to expand. B. Backup media require management. C. A high-bandwidth network is required. D. Cloud storage is difficult to deploy. Answer: C 461.Huawei's end-to-end active-active data center solution is divided into six logical layers, namely, storage, computing, application, network, transmission, and security layers. Which are key points in designing these layers? (Multiple Choice) A. The security layer uses Huawei USG series to provide security protection functions such as FW and IDS for data centers. B. The storage layer uses the FastWrite function to reduce two round trips to one for each standard write I/O, thereby improving the write performance. C. The computing layer uses virtualization platforms such as FusionSphere and VMware to provide cross-data-center clustering, thereby enabling multiple mission-critical applications to run in active-active mode. D. The transmission layer employs optimization approaches such as dispersion compensation to ensure the minimum latency on the transmission layer. Answer: ABCD 462.Which of the following statements about synchronous remote replication implemented by OceanStor V3 storage systems is false? A. After data is successfully written to both the primary and secondary LUNs, the primary storage system returns a write success response to the host. B. The primary storage system writes data to the primary LUN and sends the data to the secondary LUN. C. The impact of synchronous remote replication on the write performance of a host is not related to the distance between the primary site and the secondary site. D. Synchronous remote replication implemented by OceanStor V3 storage systems allows data to be simultaneously replicated from one primary LUN to two secondary LUNs. Answer: C 463.Which of the following statements about asynchronous remote replication of the Huawei Active-Passive DR Solution is correct? A. The distance between the data centers cannot be longer than 100 km, and the round-trip transfer latency cannot be longer than 4 ms. B. The link distance between two data centers can exceed 3000 km (network distance) and the RTT is within 200 ms. C. The distance between the two data centers cannot be longer than 300 km, and the round-trip transfer latency cannot be longer than 8 ms. D. The link distance between two data centers cannot exceed 3000 km (network distance) and the is 83 / 88

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within 100 ms. Answer: D 464.A disaster recovery system can copy service data to a local or remote data center for protection. In which scenarios the disaster recovery system cannot restore data? (Multiple Choice) A. Disk failure B. Virus attack C. Misoperation D. Breakdown of the service data center Answer: BC 465.Which of the following statements is incorrect about the scenario where one primary backup domain and multiple branch backup domains exist? A. Multiple branch backup domains are integrated into a primary backup domain, allowing you to centrally view operation reports of each backup domain in the primary backup domain. B. Each branch backup domain works independently. If a branch backup domain is disconnected from the primary backup domain, backup jobs of the branch backup domain are not affected. C. The primary backup domain periodically collects metadata of branch backup domains. When the branch backup domain restores connection with the primary backup domain, the metadata transmission automatically restores. D. After a remote client is registered with the primary backup domain as an unconfigured client, the client can be hidden and grouped. Answer: C 466.Which of the following statements is correct about the Huawei Network-Layer Remote Replication Solution? 1. Network-layer remote replication uses network devices to mask the heterogeneous nature of disk arrays at the primary and secondary centers so that remote replication can be implemented between the disk arrays. 2. In the production center, data is written to both the log volume and production volume, but in the DR center, data is just written to the production volume. A. Statement 1 is false. Statement 2 is true. B. Statement 1 is false. Statement 2 is false. C. Statement 1 is true. Statement 2 is true. D. Statement 1 is true. Statement 2 is false. Answer: C 467.Intra-city disaster recovery can adopt synchronous remote replication, and Fibre Channel links are recommended. Remote disaster recovery can adopt asynchronous remote replication, and IP links are recommended for cost reduction. 84 / 88

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A. TRUE B. FALSE Answer: A 468.An enterprise application was backed up as follows: On February 1 (Feb1), full backup of all files and directories was implemented. On February 2 (Feb2), 3 (Feb3), and 4 (Feb4), cumulative incremental backup was implemented. On February 5, service disks failed. If the enterprise wane to restore the application to the state preserved on February 4, which backup files are needed? A. Feb1+Feb2 B. Feb1+Feb2+Feb3+Feb4 C. Feb1+Feb4 D. Feb1+Feb3 Answer: C 469.Which is the correct sequence of the 5-step disaster recovery solution design? A. Select a disaster recovery solution model, > Confirm the compatibility, > Calculate the storage capacity and disaster recovery bandwidth. > Design the networking. > Design disaster recovery functions. B. Select a disaster recovery solution model, > Design the networking. > Calculate the storage capacity and disaster recovery bandwidth. > Confirm the compatibility. > Design disaster recovery functions. C. Confirm the compatibility. > Design the networking. > Calculate the storage capacity and disaster recovery bandwidth. > Design disaster recovery functions. > Select a disaster recovery solution model. D. Confirm the compatibility. > Design the networking. > Calculate the storage capacity and disaster recovery bandwidth. > Select a disaster recovery solution model. > Design disaster recovery functions. Answer: A 470.In Huawei OceanStor Backup Solution, the backup data retention period is set to 13 days and the number of retention cycles is set to 2. However, the actual backup is 3 days per cycle. In this case, how many days will data be retained? A. 4 B. 6 C. 13 D. 26 Answer: C 471.In addition to inheriting the high-reliability design of OceanStor storage systems, HyperMetro employs new solution-level reliability technologies to maximize the reliability of the active-active solution. Which aspects demonstrate the high reliability of HyperMetro? (Multiple Choice) A. Cross-site clustering B. Cross-site real-time data mirroring C. Split-brain prevention by arbitration D. Cross-site bad block repair Answer: ABCD

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472.Which of the following are subsystems of OceanStor BCManager eReplication? (Multiple Choice) A. eReplication Agent B. HyperReplication C. eReplication UI D. eReplication Server Answer: ACD 473.Which of the following is the default synchronization speed level set when creating remote replication pairs in the OceanStor V3? A. Low B. Medium C. High D. Highest Answer: B 474.In the Huawei DR Solution, at which layers can be replication performed? (Multiple Choice) A. Host layer B. Network layer C. Storage layer D. File system layer Answer: ABC 475.Which are rules for configuring file system backup policies? (Multiple Choice) A. Determine the data backup frequency based on data importance. B. Determine the task execution time based on the amount of data changes. C. Ensure that network bandwidth resources used by backup tasks in the same period are sufficient. D. Determine the data retention period based on the amount of data Answer: ABCD 476.How are full backup, cumulative incremental backup, and differential incremental backup sorted according to their occupation of backup media? A. Full backup > cumulative incremental backup > differential incremental backup B. Cumulative incremental backup > differential incremental backup > full backup C. Differential incremental backup > full backup > cumulative incremental backup D. Full backup > differential incremental backup > cumulative incremental backup Answer: A 477.In the HyperMetro active-active data center solution, the quorum server mode delivers higher reliability than the static priority mode and ensures service continuity in a single point of failure. Therefore, the quorum server mode is recommended. A. TRUE B. FALSE Answer: A

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478.Suppose that a customer has a third-part storage system and wants to set up a Local HA Solution. Is that feasible to buy the OceanStor 5600 V3 and only HyperMirror license to serve the purpose? A. Yes. All conditions required for the solution are met. B. No. HyperMirror and SmartVirtualization are both required, C. No. HyperMirror and HyperCopy are both required. D. No. HyperMirror and HyperClone are both required. Answer: B 479.Storage-layer data replication supports data replication across heterogeneous storage arrays, A. TRUE B. FALSE Answer: A 480.Which of the following is Huawei local DR Solution? A. Active-Active DC Solution B. Active-Passive DR Solution C. Local HA Solution D. Geo-Redundant Solution Answer: C 481.Which is the correct formula for calculating the file system backup bandwidth? A. If replication is not required, the formula is as follows: Required bandwidth (without deduplication) = Data amount of full backup ÷ Backup window ÷ Bandwidth utilization rate. B. If replication is required, the formula is as follows: Required bandwidth (with deduplication) = Amount of data to be replicated ÷ Backup window ÷ Bandwidth utilization rate. C. If replication is not required, the formula is as follows: Required bandwidth (with deduplication at the media end) = Data amount of full backup + Deduplication ratio ÷ Backup window ÷ Bandwidth utilization rate. D. If replication is not required, the formula is as follows: Required bandwidth (with client deduplication) = Data amount of full backup ÷ Backup window ÷ Bandwidth utilization rate. Answer: A 482.In the HyperMetro active-active data center solution, data centers A and B are deployed. If the storage array in data center A fails, which of the following statemen& are true? (Multiple Choice) A. UltraPath automatically disables all paths to data center A and forwards all I/Os to data center B. B. The storage array in data center B uses a differential bitmap to record newly received I/Os. C. After the storage array in data center A is recovered, the active-active relationship is automatically restored. Based on the differential bitmap, incremental data is automatically synchronized without affecting upper-layer applications. D. If the storage array in data center A takes the initiative to power off, a command is sent to the storage array in data center B, asking the storage array to take over services. Answer: ABCD 483.What is the sequence for installing CommServe? 87 / 88

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1. Start installation. 2. Select installation items. 3. Configure a DR path. 4. Configure an administrator account. 5. Install a database. 6. Select and configure firewalls. 7, Install .NET framework. A. 1 > 2 > 3 > 4 > 5 > 7 > 6 B. 1 > 2 > 7 > 3 > 5 > 6 > 4 C. 1 > 2 > 7 > 6 > 5 > 3 > 4 D. 1 > 2 > 3 > 4 > 7 > 6 > 5 Answer: C 484.What type of backup networking is applicable to all types of storage? A. LAN-Base B. LAN-Free C. Server-Less D. Server-Free Answer: A 485.In the Huawei Active-Passive DR Solution, it is a mandatory step to create consistency groups. A. TRUE B. FALSE Answer: B 486.Which are rules for configuring file system backup policies? (Multiple Choice) A. Determine the data backup frequency based on data importance. B. Determine the task execution time based on the amount of data changes. C. Ensure that network bandwidth resources used by backup tasks in the same period are sufficient. D. Determine the data retention period based on the amount of data. Answer: ABCD

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