Operating System (OS)
Virtual Memory

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.
allows multiple programs to reside in separate areas of core at the time.
is a method of allocating processor time.
None of these
consists of those addresses that may be generated by a processor during execution of a computation.

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Operating System (OS)
Thrashing can be avoided if

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

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Operating System (OS)
Swapping

allows each program in turn to use the memory
does not work with overlaying
None of these
allows many programs to use memory simultaneously
works best with many small partitions

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