Operating System (OS)
The function(s) of file system is (are):

to provide security against loss of information due to system failure
to provide for long and short term storage of files with appropriate economic tradeoffs.
to provide complete file naming freedom to the users and to permit controlled sharing of files
All of these
None of these

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Operating System (OS)
Thrashing

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

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