Operating System (OS)
System maintenance:

None of these
is not required if the system is well written
is necessary on all systems, regardless of how good
is usually not necessary
always requires several programs

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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.
to assign storage to all variables referenced in the source program.
All of these
to assign storage to all temporary locations that are necessary for intermediate results.
None of these

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