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

All of these
to provide complete file naming freedom to the users and to permit controlled sharing of files
None of these
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.

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Operating System (OS)
System maintenance:

is usually not necessary
is necessary on all systems, regardless of how good
is not required if the system is well written
always requires several programs
None of these

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