Operating System (OS)
Which type of command requires additional files to perform specific operations?

Primary commands
Internal commands
External commands
Valuable commands

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

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