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

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  3. RAID level _____ is also known as block interleaved parity organisation and uses block level striping and keeps a parity block on a seperate disk.
  4. A.
    1
    B.
    2
    C.
    3
    D.
    4

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  5. A performance problem with _________ is the expense of computing and writing parity.
  6. A.
    non-parity based RAID levels
    B.
    parity based RAID levels
    C.
    all RAID levels
    D.
    None of these

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  7. In RAID level 4, one block read, accesses __________.
  8. A.
    only one disk
    B.
    all disks simultaneously
    C.
    all disks sequentially
    D.
    None of these

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  9. The overall I/O rate in RAID level 4 is :
  10. A.
    low
    B.
    very low
    C.
    high
    D.
    None of these

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  11. A write of a block has to access : (choose all that apply)
  12. A.
    the disk on which the block is stored
    B.
    parity disk
    C.
    a parity block
    D.
    All of these

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  13. RAID level 5 is also known as :
  14. A.
    bit-interleaved parity organization
    B.
    block-interleaved parity organization
    C.
    block-interleaved distributed parity
    D.
    memory-style ECC organization

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  15. RAID level ____ spreads parity and data among all N+1 disks rather than storing data in N disks and parity in 1.
  16. A.
    3
    B.
    4
    C.
    5
    D.
    6

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  17. The potential overuse of a single parity disk is avoided in RAID level ____.
  18. A.
    3
    B.
    4
    C.
    5
    D.
    All of these

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  19. RAID level 0+1 is used because, RAID level 0 provides ______ whereas RAID level 1 provides ________.
  20. A.
    performance, redundancy
    B.
    performance, reliability
    C.
    redundancy, performance
    D.
    None of these

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