Operating System (OS)
Uniform Symbols Table

a permanent table which lists all key words and special symbols of the language in symbolic form
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
contains all constants in the program
None of these

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Operating System (OS)
The term 'polling' in a computer means a process by which a computer system

None of these
multiplexes the inputs and updates the memory accordingly
decides correct alternative by analysing several ones
inquires to see if a terminal has any transaction to send
detects/corrects errors

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