Operating System (OS)
In which addressing mode, the address of the location of the operand is given explicitly as a part of the instruction.

index mode
None of these
absolute mode
immediate mode
modulus mode

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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 available on magnetic tapes
None of these
they are memory resident

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