Operating System (OS)
The ability of an operating system to control the activities of multiple program at the same time is called

Multipaging
Multioperating
Multiprocessing
Multitasking

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Operating System (OS)
Virtual Memory

is a method of allocating processor time.
allows multiple programs to reside in separate areas of core at the time.
consists of those addresses that may be generated by a processor during execution of a computation.
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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