Operating System (OS)
Virtual Memory

allows multiple programs to reside in separate areas of core at the time.
is a method of allocating processor time.
None of these
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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Operating System (OS)
Addressing structure

All of these
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
defines the fundamental method of determining effective operand addresses
None of these
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.

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