Operating System (OS)
Capacity planning

None of these
is independent of the operating system
does not depend on the monitoring tools available
requires detailed system performance information
is not needed in small installations

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Operating System (OS)
The Memory Buffer Register (MBR)

None of these
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
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 hardware memory device which denotes the location of the current instruction being executed.
contains the address of the memory location that is to be read from or stored into.

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