Operating System (OS)
The primary purpose of an operating system is to:

keep system programmers employed
make the most efficient use of the hardware
allow people to sue the computers
None of these
make computer easier to use

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

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
All of these

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