Operating System (OS)
Operating system

provides a layered, user-friendly interface
enables the programmer to draw a flowchart
links a program with the subroutines it references
All of these
None of these

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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

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

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Operating System (OS)
What is dispatch latency ?

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

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