Operating System (OS)
A public key encryption system

allows only the correct sender to decode the data
allows anyone to decode the transmission
None of these
allows only the correct receiver to decode the data
does not encode the data before transmitting it

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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
a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure
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
None of these

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