Operating System (OS)
Under virtual storage,

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

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Operating System (OS)
Data encryption

None of these
is mostly used by public networks
cannot be used by private installations
is not necessary, since data cannot be intercepted
is mostly used by financial networks

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