Operating System (OS)
The Memory Address Register

None of these
contains the address of the memory location that is to be read from or stored into.
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".
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.

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Operating System (OS)
Object code

None of these
must be rewritten before execution
is ready to execute
is the output of compilers, but not assemblers
must be "loaded" before execution

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