RAID Structure - 1 - Operating System Questions & Answers

1.

RAID level 3 supports a lower number of I/Os per second, because _______________

   A.) Every disk has to participate in every I/O request
   B.) Only one disk participates per I/O request
   C.) I/O cycle consumes a lot of CPU time
   D.) All of the mentioned

Answer: Option 'A'

Every disk has to participate in every I/O request

2.

RAID level _____ is also known as block interleaved parity organisation and uses block level striping and keeps a parity block on a separate disk.

   A.) 1
   B.) 2
   C.) 3
   D.) 4

Answer: Option 'D'

4

3.

A performance problem with _________ is the expense of computing and writing parity.

   A.) non-parity based RAID levels
   B.) parity based RAID levels
   C.) all RAID levels
   D.) none of the mentioned

Answer: Option 'B'

parity based RAID levels

4.

In RAID level 4, one block read, accesses __________

   A.) only one disk
   B.) all disks simultaneously
   C.) all disks sequentially
   D.) none of the mentioned

Answer: Option 'A'

only one disk

5.

A write of a block has to access :

   A.) the disk on which the block is stored
   B.) parity disk
   C.) a parity block
   D.) all of the mentioned

Answer: Option 'D'

all of the mentioned

6.

RAID level 5 is also known as :

   A.) bit-interleaved parity organization
   B.) block-interleaved parity organization
   C.) block-interleaved distributed parity
   D.) memory-style ECC organization

Answer: Option 'C'

block-interleaved distributed parity

7.

RAID level ____ spreads parity and data among all N+1 disks rather than storing data in N disks and parity in 1.

   A.) 3
   B.) 4
   C.) 5
   D.) 6

Answer: Option 'C'

5

8.

The potential overuse of a single parity disk is avoided in RAID level _______

   A.) 2
   B.) 3
   C.) 4
   D.) 5

Answer: Option 'D'

5

9.

RAID level 0+1 is used because, RAID level 0 provides ______ whereas RAID level 1 provides ________

   A.) performance, redundancy
   B.) performance, reliability
   C.) redundancy, performance
   D.) none of the mentioned

Answer: Option 'B'

performance, reliability

10.

If a disk fails in RAID level ___ rebuilding lost data is easiest.

   A.) 1
   B.) 2
   C.) 3
   D.) 4

Answer: Option 'A'

Data can be copied from another disk in raid level 1, for other raid levels all other disks have to be accessed.

RAID Structure - 1 - Operating System Questions & Answers Download Pdf

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