Operating System (OS)
Memory management is :

replaced with virtual memory on current systems
not used in modern operating system
not used on multiprogramming systems
None of these
critical for even the simplest operating systems

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

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