Operating System (OS)
Under virtual storage,

None of these
a single program is processed by two or more CPUs
interprogram interference may occur
only the active pages of a program are stored in primary storage
two or more programs are stored concurrently in primary storage

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Operating System (OS)
Swapping

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

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