Operating System (OS)
All of the following are task performed by the operating system except

Controlling the access that application program has to the CPU
Managing hardware on the computer
Performing housekeeping task like file compression and disk defragmentation
Provides an interface for user to interact with computer

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Operating System (OS)
Swapping

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

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