Operating System (OS)
Backups should be done

daily for most installations
as several incrementals, followed by an image copy
None of these
weekly for most installations
as several image copies, followed by an incremental

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Operating System (OS)
The Memory Address Register

contains the address of the memory location that is to be read from or stored into.
is a hardware memory device which denotes the location of the current instruction being executed.
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".

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