Operating System (OS)
Which of the following does not occur during the power-on-self-test (POST)?

The scan disk utility begins to run
The BIOS identification process occurs
The video card and video memory are tested
Memory chip are checked to ensure that they are working properly

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Operating System (OS)
The instruction register

is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
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 hardware memory device which denotes the location of the current instruction being executed.

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