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
they are memory resident
None of these

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Operating System (OS)
Thrashing can be avoided if

the speed of I/O processor is increased
None of these
the pages, belonging to the working set of the programs, are in main memory
the speed of CPU is increased
All of these

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Operating System (OS)
Seeks analysis

is only shown on real-time displays
None of these
is used for analyzing control-unit busy problems
is used for analyzing device busy problems
is used for analyzing paging problems

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