Operating System (OS)
Trojan-Horse programs

usually are immediately discovered
are legitimate programs that allow unauthorized access
are hidden programs that do not show up on the system
do not usually work
None of these

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Operating System (OS)
Uniform Symbols Table

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

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