Operating System (OS)
All of the following are task performed by the operating system except

Performing housekeeping task like file compression and disk defragmentation
Provides an interface for user to interact with computer
Managing hardware on the computer
Controlling the access that application program has to the CPU

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Operating System (OS)
What is dispatch latency ?

The time taken by the dispatcher to stop one process and start another
The time taken by the processor to write a file into disk
None of the listed here
The whole time taken by all processor

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Operating System (OS)
The function(s) of the Storage Assignment is (are)

to assign storage to literals, and to ensure that the storage is allocate and appropriate locations are initialized.
All of these
to assign storage to all variables referenced in the source program.
None of these
to assign storage to all temporary locations that are necessary for intermediate results.

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