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

None of these
absolute mode
modulus mode
index mode
immediate mode

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Operating System (OS)
The term "operating system" means

the way a floppy disk drive operates
None of these
the way a computer operator works
a set of programs which controls computer working
conversion of high level language into machine code

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