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

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

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Operating System (OS)
Under virtual storage,

two or more programs are stored concurrently in primary storage
None of these
only the active pages of a program are stored in primary storage
a single program is processed by two or more CPUs
interprogram interference may occur

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