Operating System (OS)
What do you mean by Memory Compaction?

Combine multiple small memory holes into one big hole
Divide memory hole by 2
Divide big memory hole into small holes
Combine multiple equal memory holes into one big hole

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Operating System (OS)
Under virtual storage,

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

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