CDCP Storage Data Center 2

Question 1

Which RAID level provides striping with double distributed parity, tolerating up to two simultaneous drive failures?

Accepted Answer

RAID 6

Answer

RAID 6 uses two independent parity blocks distributed across drives, allowing the array to survive two concurrent drive failures.

Question 2

In a SAN environment, what is the primary function of a fabric switch?

Accepted Answer

To interconnect hosts and storage devices using Fibre Channel or iSCSI

Answer

A fabric switch in a SAN interconnects hosts and storage arrays using Fibre Channel or iSCSI protocols, enabling block-level storage access.

Question 3

What is the purpose of storage tiering in a data center?

Accepted Answer

To automatically move data between different speed/cost storage classes based on access frequency

Answer

Storage tiering automatically migrates data between high-performance and lower-cost tiers based on how frequently that data is accessed.

Question 4

Which protocol is used for block-level storage over standard Ethernet networks as an alternative to Fibre Channel?

Accepted Answer

iSCSI

Answer

iSCSI encapsulates SCSI commands within TCP/IP packets, enabling block-level SAN storage over standard Ethernet infrastructure.

Question 5

What does RPO (Recovery Point Objective) measure in data center storage planning?

Accepted Answer

The maximum acceptable data loss measured in time

Answer

RPO defines the maximum tolerable period of data loss — for example, an RPO of 1 hour means you can lose at most 1 hour of data.

CDCP - Certified Data Centre Professional Practice Test