Operating System Questions & Answers – RAID Structure – 2

This set of Advanced Operating System Questions and Answers focuses on “RAID Structure – 2”.

1. A large number of disks in a system improves the rate at which data can be read or written :
a) if the disks are operated on sequentially
b) if the disks are operated on selectively
c) if the disks are operated in parallel
d) all of the mentioned
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2. RAID stands for :
a) Redundant Allocation of Inexpensive Disks
b) Redundant Array of Important Disks
c) Redundant Allocation of Independent Disks
d) Redundant Array of Independent Disks
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3. 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 :
a) 100 hours
b) 10 days
c) 10 hours
d) 1000 hours
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4. The solution to the problem of reliability is the introduction of __________
a) aging
b) scheduling
c) redundancy
d) disks
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5. The technique of duplicating every disk is known as :
a) mirroring
b) shadowing
c) redundancy
d) all of the mentioned
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6. The mean time to failure of a mirrored disk depends on :
I) the mean time to failure of individual disks
II) the mean time to repair
a) Only I
b) Only II
c) Both I and II
d) Neither I nor II
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7. RAID level ________ refers to disk arrays with striping at the level of blocks, but without any redundancy.
a) 0
b) 1
c) 2
d) 3
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8. RAID level _______ refers to disk mirroring.
a) 0
b) 1
c) 2
d) 3
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9. RAID level ______ is also known as bit interleaved parity organisation.
a) 0
b) 1
c) 2
d) 3
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10. A single parity bit can be used for :
a) detection
b) multiple error corrections
c) few error corrections
d) all of the mentioned
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11. RAID level ______ is also known as memory style error correcting code(ECC) organization.
a) 1
b) 2
c) 3
d) 4
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12. RAID level 3 does not have _________ as in RAID level 1.
a) efficiency
b) enough storage space for data
c) storage overhead
d) time consumption overhead
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Sanfoundry Global Education & Learning Series – Operating System.