Operating System (OS)
Process is

a program in execution
contents of main memory
None of these
program in High level language kept on disk
a job in secondary memory

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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

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

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