Operating System (OS)
Thrashing can be avoided if

the speed of I/O processor is increased
All of these
the pages, belonging to the working set of the programs, are in main memory
the speed of CPU is increased
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

None of these
they are initially stored on disk
they are memory resident
they are partly in primary memory and partly on disk
they are available on magnetic tapes

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