Operating System MCQ with Answers

Operating System MCQ with Answers

36) A file organization component of a VSAM file is

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

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

Answer is:

it allows cache domain to contain redundant data

40) The maximum amount of information that is available with one position of the disk access arm for a removal disk pack (without further movement of the arm with multiple heads) is

Answer is:

a block of data

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