Operating System (OS)
Uniform Symbols Table

a permanent table which lists all key words and special symbols of the language in symbolic form
contains all constants in the program
a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure
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

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Operating System (OS)
Addressing modes

None of these
are variations in the use of fundamental addressing structures, or some associated actions which are related to addressing.
All of these
performs indicated operations on two fast registers of the machine and leave the result in one of the registers.
defines the fundamental method of determining effective operand addresses

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Operating System (OS)
A spooler is a

Location in memory that maintains the contents of documents until it prints
Program that coordinates the print job that are waiting to process
Queue of print job that are waiting to print
Message sent from the printer to the operating system when a print job is completed

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