Operating System (OS)
Under virtual storage,

only the active pages of a program are stored in primary storage
None of these
interprogram interference may occur
a single program is processed by two or more CPUs
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
allows each program in turn to use the memory
None of these
does not work with overlaying

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