Operating System (OS)
Addressing modes

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

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Operating System (OS)
The LRU algorithm

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

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