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
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
None of these

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Operating System (OS)
A co-processor

Is quite common in modern computer
Causes all processor to function equally
Works with any application
Is relatively easy to support in software

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