Operating System (OS)
In which addressing mode the operand is given explicitly in the instruction?

index mode
immediate mode
absolute mode
indirect mode
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 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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