DEA-1TT5 Storage Systems Fundamentals 3

Question 1

What distinguishes NVMe from SATA as a storage interface protocol?

Accepted Answer

NVMe uses the PCIe bus with lower latency and higher parallelism than the SATA interface

Answer

NVMe uses a parallel command queue while SATA uses serial communication

Answer

NVMe only works with HDDs while SATA works with SSDs

Answer

NVMe is slower but more reliable than SATA

Question 2

What is a 'LUN' in SAN storage?

Accepted Answer

Logical Unit Number — a logical identifier assigned to a storage volume presented to a host

Answer

Local Unit Node — a network switch port identifier

Answer

Large Unified Network — a wide-area storage fabric

Answer

Layered Utility Node — a cache tier within an array

Question 3

Which storage term refers to the maximum amount of data that can be transferred per unit of time?

Accepted Answer

Throughput

Answer

Latency

Answer

IOPS

Answer

Cache hit ratio

Question 4

In a storage array, what is 'multipathing' used for?

Accepted Answer

Providing multiple physical paths between a host and storage to ensure availability and load balancing

Answer

Creating multiple RAID sets for redundancy

Answer

Distributing data across multiple storage arrays

Answer

Enabling multiple protocols on a single port

Question 5

What is the purpose of 'zoning' in a Fibre Channel SAN?

Accepted Answer

To control which hosts can see and communicate with which storage targets

Answer

To divide the SAN fabric into geographic regions for disaster recovery

Answer

To create performance tiers within the SAN fabric

Answer

To assign IP addresses to Fibre Channel devices

Question 6

Which component in a storage array is responsible for maintaining data integrity if the array loses power unexpectedly?

Accepted Answer

UPS-backed cache or NVRAM (Non-Volatile RAM)

Answer

The host bus adapter

Answer

The storage management software

Answer

The Fibre Channel switch