Operating System (OS)
Process is

a program in execution
program in High level language kept on disk
a job in secondary memory
contents of main memory
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 initially stored on disk
they are partly in primary memory and partly on disk
they are memory resident
None of these
they are available on magnetic tapes

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