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

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

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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.
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 group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.
None of these

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Operating System (OS)
The term 'polling' in a computer means a process by which a computer system

decides correct alternative by analysing several ones
None of these
multiplexes the inputs and updates the memory accordingly
detects/corrects errors
inquires to see if a terminal has any transaction to send

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