Operating System (OS)
Thrashing can be avoided if

the speed of I/O processor is increased
All of these
the speed of CPU is increased
the pages, belonging to the working set of the programs, are in main memory
None of these

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Operating System (OS)
System generation:

is always very difficult
is always quite simple
requires extensive tools to be understandable
varies in difficulty between systems
None of these

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Operating System (OS)
The Memory Address Register

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

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