Operating System (OS)
System generation:

varies in difficulty between systems
is always very difficult
requires extensive tools to be understandable
is always quite simple
None of these

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Operating System (OS)
Under virtual storage,

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

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