Operating System Mcqs

Page No. 92

RAID level ________ refers to disk arrays with striping at the level of blocks, but without any redundancy.


a0

✓


b1

✖


c2

✖


d3

✖


View Answer 0

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


aOnly I

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bOnly II

✖


cBoth I and II

✓


dNeither I nor II

✖


View Answer Both I and II

The technique of duplicating every disk is known as ____________


amirroring

✓


bshadowing

✖


credundancy

✖


dall of the mentioned

✖


View Answer mirroring

The solution to the problem of reliability is the introduction of __________


aaging

✖


bscheduling

✖


credundancy

✓


ddisks

✖


View Answer redundancy

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 ____________


a100 hours

✖


b10 days

✖


c10 hours

✖


d1000 hours

✓


View Answer 1000 hours

A large number of disks in a system improves the rate at which data can be read or written if ____________


athe disks are operated on sequentially

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bthe disks are operated on selectively

✖


cthe disks are operated in parallel

✓


dall of the mentioned

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The surface area of tape is ________ the surface area of a disk.


amuch lesser than

✖


bmuch larger than

✓


cequal to

✖


dnone of the mentioned

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View Answer much larger than

Random access to tape is _______ a disk seek.


amuch slower than

✓


bmuch faster than

✖


ccomparable to

✖


dnone of the mentioned

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View Answer much slower than

A tape holds _______ data than optical or magnetic disk cartridge.


alesser

✖


bmore

✓


cmuch lesser

✖


dnone of the mentioned

✖


View Answer more

WORM stands for ____________


awrite only, read mandatory

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bwrite once, read many times

✓


cwrite only once, read multiple

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dnone of the mentioned

✖



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