Operating System (OS)
Most of the microcomputer's operating systems like Apple DOS, MS DOS and PC DOS etc. are called disk operating systems because

None of these
they are available on magnetic tapes
they are partly in primary memory and partly on disk
they are memory resident
they are initially stored on disk

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Operating System (OS)
What is dispatch latency ?

None of the listed here
The time taken by the dispatcher to stop one process and start another
The whole time taken by all processor
The time taken by the processor to write a file into disk

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