Operating System (OS)
The term "operating system" means

a set of programs which controls computer working
the way a computer operator works
conversion of high level language into machine code
the way a floppy disk drive operates
None of these

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Operating System (OS)
Multiprogramming systems:

execute more jobs in the same time period
execute each job faster
None of these
are used only on large mainframe computers
are easier to develop than single programming system

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Operating System (OS)
Uniform Symbols Table

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
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

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