Operating System (OS)
Uniform Symbols Table

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
contains all constants in the program
a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure
a permanent table which lists all key words and special symbols of the language in symbolic form

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Operating System (OS)
Memory management is :

critical for even the simplest operating systems
None of these
replaced with virtual memory on current systems
not used in modern operating system
not used on multiprogramming systems

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