Operating System (OS)
Memory management is :

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

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Operating System (OS)
Multiprogramming

is a method of allocating processor time.
None of these
allows multiple programs to reside in separate areas of core at the time.
consists of those addresses that may be generated by a processor during execution of a computation.
is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.

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