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Huawei H19-308_V4.0 Exam Syllabus Topics:

SectionWeightObjectives
Huawei OceanStor Pacific Distributed Storage5%- Architecture and applicable scenarios
Data Storage Basics8%- Storage media and technologies
- Basic concepts and architectures of storage systems
Backup and Disaster Recovery Technologies18%- Backup types and strategies
- Disaster recovery principles and solutions
Huawei OceanProtect Backup Storage5%- Backup and recovery capabilities
Huawei OceanStor Dorado All-Flash Storage15%- Typical application scenarios
- Product positioning and key features
NAS Storage Basics12%- File system and sharing principles
- NAS protocols (NFS, SMB/CIFS)
Object Storage Basics10%- Object storage concepts and features
- Application scenarios of object storage
Huawei OceanStor Hybrid Flash Storage10%- Solution planning and recommendation
- Product characteristics and advantages
SAN Storage Basics17%- SAN architecture and protocols (FC, iSCSI)
- LUN management and access

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Huawei HCSA-Presales-Storage V4.0 Sample Questions (Q24-Q29):

NEW QUESTION # 24
Which RAID level cannot provide data redundancy protection?

Answer: C

Explanation:
In the Huawei OceanStor RAID 2.0+ architecture, Redundant Array of Independent Disks (RAID) levels are used to balance performance, capacity, and reliability. RAID 0, also known as "striping," distributes data blocks across multiple physical disks to maximize I/O performance. By allowing multiple disks to be read or written simultaneously, it provides the highest throughput and capacity utilization (100%).
However, the defining characteristic of RAID 0 is the complete lack of redundancy. Unlike RAID 1 (Mirroring), RAID 5 (Parity), or RAID 6 (Dual Parity), RAID 0 does not store redundant information or parity bits. Huawei documentation explicitly states that if any single physical disk in a RAID 0 group fails, the entire RAID group becomes inaccessible, and all data within that group is lost. Therefore, RAID 0 is strictly recommended only for temporary data or scenarios where data loss is acceptable and maximum performance is the sole priority. For enterprise production environments, Huawei recommends RAID 5, RAID 6, or RAID-TP.


NEW QUESTION # 25
Which of the following statements about RAID 5 are correct? (Choose all that apply.)

Answer: B,C


NEW QUESTION # 26
Backup focuses on service continuity, while disaster recovery focuses on data recoverability.

Answer: B

Explanation:
According to Huawei's technical standards for data protection, this statement is the reverse of the actual definitions. Backup focuses on data recoverability, while Disaster Recovery (DR) focuses on service continuity.
Backup is the process of creating a redundant copy of data to protect against accidental deletion, data corruption, or hardware failure. Its primary goal is to ensure that a copy of the data exists and can be restored (recoverability). Disaster Recovery, however, involves the infrastructure and processes required to resume business operations (services) after a catastrophic event (like a flood or fire). DR utilizes technologies like HyperMetro (active-active) or HyperReplication (remote replication) to ensure that the application remains available or can be restarted quickly at a secondary site, thereby ensuring Service Continuity. Because the statement swaps these two core objectives, the answer is False.


NEW QUESTION # 27
What are the backup networking modes?

Answer: A,B,C,D

Explanation:
Backup networking modes describe how backup data moves between production hosts, backup servers, storage systems, and backup media. LAN-Based backup sends backup traffic through the production Ethernet network, which is simple but may consume service bandwidth. LAN-Free backup moves backup traffic through a dedicated storage network, usually SAN, reducing pressure on the production LAN. SAN-Based backup uses SAN connectivity to improve backup throughput and isolate backup traffic from ordinary service traffic. Server-Free backup further reduces host involvement by allowing storage systems or backup infrastructure to move data more directly, minimizing the performance impact on application servers. Huawei data protection designs commonly classify backup networking by these modes because each mode has different cost, performance, complexity, and service-impact characteristics. Therefore, all four listed modes are valid backup networking modes.


NEW QUESTION # 28
The recovery time objective (RTO) in a disaster recovery system refers to the time point to which the system and data must be recovered after a disaster occurs.

Answer: B


NEW QUESTION # 29
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