Operating System (OS)
Identify false statement

You can restore any files in recycle bin if you ever need
You can find deleted files in recycle bin
You can right click and choose Empty Recycle Bin to clean it at once
You can increase free space of disk by sending files in recycle bin

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Operating System (OS)
System maintenance:

is necessary on all systems, regardless of how good
is usually not necessary
None of these
always requires several programs
is not required if the system is well written

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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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