35) Access time is the highest in the case of

floppy disk

cache

swapping devices

magnetic disks

Answer is:

magnetic disks

Operating System MCQ with Answers

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36) A file organization component of a VSAM file is

relative record data set.

keyed sequential data set.

entry sequential data set.

all of these

Answer is:

all of these

Explanation:

A file organization component of a VSAM file is
* relative record data set.
* keyed sequential data set.
* entry sequential data set.

37) Access to moving head disks requires three periods of delay before information is brought into memory. The response that correctly lists the three time delays for the physical access of data in the order of the relative speed from the slowest to the fastest is

latency time, cache overhead time, seek time

transmission time, latency time, seek time

seek time, latency time, transmission time

cache overhead time, latency time, seek time

Answer is:

seek time, latency time, transmission time

38) If a disk has a seek time of 20 ms, rotates 20 revolutions per second, has 100 words per block, and each track has capacity of 300 words. Then the total time required to access one block is

Answer is:

60

39) An unpaged or read-ahead cache associates disk domains with the address of the read and continues for a specific length. The major disadvantage of unpaged cache is that

it allows cache domain to contain redundant data

it does not allow writes to be cached

its access time is greater than that of paged caching

read ahead cache domain blocks are necessarily fixed in size

Answer is:

it allows cache domain to contain redundant data

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35) Access time is the highest in the case of

magnetic disks

Operating System MCQ with Answers

Related Operating System MCQ with Answers

36) A file organization component of a VSAM file is

all of these

37) Access to moving head disks requires three periods of delay before information is brought into memory. The response that correctly lists the three time delays for the physical access of data in the order of the relative speed from the slowest to the fastest is

seek time, latency time, transmission time

38) If a disk has a seek time of 20 ms, rotates 20 revolutions per second, has 100 words per block, and each track has capacity of 300 words. Then the total time required to access one block is

60

39) An unpaged or read-ahead cache associates disk domains with the address of the read and continues for a specific length. The major disadvantage of unpaged cache is that

it allows cache domain to contain redundant data

Operating System MCQ with Answers