Operating System (OS)
The instruction register

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.
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
contains the address of the memory location that is to be read from or stored into.

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Operating System (OS)
Which of the following is true for machine language.

Depicting flow of data in a system
A sequence of instructions which, when followed properly, solves a problem
Repeated execution of program segments
the language which communicates with the computer using only the binary digits 1 and 0.
None of these

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