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

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

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Operating System (OS)
Thrashing

is a natural consequence of virtual memory systems
can always be avoided by swapping
can be caused by poor paging algorithms
None of these
always occurs on large computers

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