Operating System (OS)
In virtual memory systems, Dynamic address translation

is the hardware necessary to implement paging
None of these
is useless when swapping is used
stores pages at a specific location on disk
is part of the operating system paging algorithm

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Operating System (OS)
The instruction register

contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
contains the address of the memory location that is to be read from or stored into.
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
is a hardware memory device which denotes the location of the current instruction being executed.
None of these

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