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 complete file naming freedom to the users and to permit controlled sharing of files
to provide security against loss of information due to system failure
All of these

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Operating System (OS)
Addressing structure

defines the fundamental method of determining effective operand addresses
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
None of these
All of these
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.

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