Operating System (OS)
Semaphores

None of these
synchronize critical resources to prevent deadlock
are used for memory management
synchronize critical resources to prevent contention
are used to do I/O

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

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

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Operating System (OS)
Memory

is a device that performs a sequence of operations specified by instructions in memory.
is typically characterized by interactive processing and time-slicing of the CPU
None of these
is the device where information is stored
is a sequence of instructions

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