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MCQs

Total Questions : 22 | Page 1 of 3 pages
Question 1. If a disk fails in RAID level ___ rebuilding lost data is easiest.
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option A. -> 1


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


Question 2. Where performance and reliability are both important, RAID level ____ is used.
  1.    0
  2.    1
  3.    2
  4.    0+1
 Discuss Question
Answer: Option D. -> 0+1


None.


Question 3. A large number of disks in a system improves the rate at which data can be read or written :
  1.    if the disks are operated on sequentially
  2.    if the disks are operated on selectively
  3.    if the disks are operated in parallel
  4.    All of these
 Discuss Question
Answer: Option C. -> if the disks are operated in parallel


None.


Question 4. If the mean time to failure of a single disk is 100,000 hours, then the mean time to failure of some disk in an array of 100 disks will be :
  1.    100 hours
  2.    10 days
  3.    10 hours
  4.    1000 hours
 Discuss Question
Answer: Option D. -> 1000 hours


None.


Question 5. RAID stands for :
  1.    Redundant Allocation of Inexpensive Disks
  2.    Redundant Array of Important Disks
  3.    Redundant Allocation of Independent Disks
  4.    Redundant Array of Independent Disks
 Discuss Question
Answer: Option D. -> Redundant Array of Independent Disks


None.


Question 6. RAID level ______ is also known as memory style error correcting code(ECC) organization.
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2


None.


Question 7. RAID level 3 does not have _________ as in RAID level 1.
  1.    efficiency
  2.    enough storage space for data
  3.    storage overhead
  4.    time consumption overhead View Answer
 Discuss Question
Answer: Option C. -> storage overhead


There is one mirror disk for every disk in level 1.


Question 8. RAID level 3 supports a lower number of I/Os per second, because _______________.
  1.    every disk has to participate in every I/O request
  2.    only one disk participates per I/O request
  3.    I/O cycle consumes a lot of CPU time
  4.    All of these
 Discuss Question
Answer: Option A. -> every disk has to participate in every I/O request


None.


Question 9. RAID level _____ is also known as block interleaved parity organisation and uses block level striping and keeps a parity block on a seperate disk.
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option D. -> 4


None.


Question 10. In RAID level 4, one block read, accesses __________.
  1.    only one disk
  2.    all disks simultaneously
  3.    all disks sequentially
  4.    None of these
 Discuss Question
Answer: Option A. -> only one disk


None.


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