Operating System (OS)
Under multiprogramming, turnaround time for short jobs is usually _____ and that for long jobs is slightly _____.

lengthened; lengthened
shortened; shortened
lengthened; shortened
None of these
shortened; lengthened

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

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Operating System (OS)
Virtual Memory

consists of those addresses that may be generated by a processor during execution of a computation.
is a method of allocating processor time.
allows multiple programs to reside in separate areas of core at the time.
None of these
is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.

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