Operating System (OS)
Thrashing

is a natural consequence of virtual memory systems
can be caused by poor paging algorithms
can always be avoided by swapping
always occurs on large computers
None of these

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Operating System (OS)
Uniform Symbols Table

contains all constants in the program
a permanent table which lists all key words and special symbols of the language in symbolic form
None of these
consists of a full or partial list of the token's as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation
a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure

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Operating System (OS)
The instruction 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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