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

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

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Operating System (OS)
A page fault

occurs when a program accesses a page of memory
is an access to a page not currently in memory
is a reference to a page belonging to another program
is an error is a specific page
None of these

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