Operating System (OS)
Feed back queue

are very easy to implement
None of these
are used to favor real-time tasks
require manual intervention to implement properly
dispatch tasks according to execution characteristics

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Operating System (OS)
Backups should be done

as several image copies, followed by an incremental
weekly for most installations
daily for most installations
as several incrementals, followed by an image copy
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
contains all constants in the program
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
a permanent table which lists all key words and special symbols of the language in symbolic form

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