Operating System (OS)
The command interpreter

is menu drive
is usually the primary user interface
requires fixed format commands
None of these
is quite different from the SCL interpreter

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Operating System (OS)
Thrashing can be avoided if

All of these
the pages, belonging to the working set of the programs, are in main memory
the speed of I/O processor is increased
None of these
the speed of CPU is increased

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

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
to provide complete file naming freedom to the users and to permit controlled sharing of files
None of these
All of these

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