Operating System (OS)
Multiprogramming

is a method of memory allocation by which the program is subdivided into equal portions, or pages and core is subdivided into equal portions or blocks.
allows multiple programs to reside in separate areas of core at the time.
is a method of allocating processor time.
consists of those addresses that may be generated by a processor during execution of a computation.
None of these

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

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Operating System (OS)
You should choose sleep option when

The computer is tired after working for the whole day
You are leaving for a very short time and want to resume you work shortly
When computer gets hanged frequently. Let it sleep for some time
You finish working and going to bed

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