Operating System (OS)
A disk scheduling algorithm in an operating system causes the disk arm to move back and forth across the disk surface in order to service all requests in its path. This is a

Shortest Seek Time First (SSTE)
None of these
Scan
FIFO
First come first served

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Operating System (OS)
Seeks analysis

is used for analyzing control-unit busy problems
is used for analyzing paging problems
None of these
is only shown on real-time displays
is used for analyzing device busy problems

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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.
None of these
to provide security against loss of information due to system failure

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