Operating System (OS)
The instruction register

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.
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".
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 statement is true.

None of these
Thrashing is a natural consequence of virtual memory systems.
Seek analysis is used for analysing control-unit busy problems.
The LRU algorithm pages out pages that have been used recently
All of these

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Operating System (OS)
Multiprogramming

is a method of allocating processor time.
allows multiple programs to reside in separate areas of core at the time.
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.
None of these
consists of those addresses that may be generated by a processor during execution of a computation.

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