Operating System (OS)
Which one is true for unconditional disk formatting?

Transfer system files after format
All of above
Destroys every byte of data on a disk by overwriting it with with blank spaces
Do not check/scan surface after format

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Operating System (OS)
The instruction register

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".
None of these
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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