Operating System (OS)
Sleep is a good mode to use because

All of the listed here
It makes computer fresh after it wakes up
It saves power which in true is saving money
It consumes low battery when you start it again

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Operating System (OS)
The LRU algorithm

None of these
pages out pages that have not been used recently
pages out the first page in a given area
pages out pages that have been used recently
pages out pages that have been least used recently

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

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

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