Operating System (OS)
System maintenance:

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

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

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

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