Operating System (OS)
Memory management is :

not used in modern operating system
critical for even the simplest operating systems
not used on multiprogramming systems
None of these
replaced with virtual memory on current systems

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

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

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Operating System (OS)
The advantage(s) of incorporating the macro processor into pass 1 is(are):

more flexibility is available to the programmer in that he may use all the features of the assembler in conjunction with macros.
many functions do not have to be implemented twice.
None of these
Functions are combined and it is not necessary to create intermediate files as output from the macros processor and input to the assembler.
All 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 available on magnetic tapes
None of these
they are partly in primary memory and partly on disk
they are initially stored on disk
they are memory resident

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