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 initially stored on disk
they are memory resident
they are available on magnetic tapes
None of these

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Operating System (OS)
The advantage(s) inherent to using high level languages is (are)

Improved debugging capability, and superior documentation
Fewer people, less management and shorter transition in learning time
All of these
None of these
A greater degree of machine independence

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