Operating System (OS)
A page fault

is an error is a specific page
is an access to a page not currently in memory
is a reference to a page belonging to another program
occurs when a program accesses a page of memory
None of these

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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.
None of these
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

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