Operating System (OS)
The advantage(s) of incorporating the macro processor into pass 1 is(are):

many functions do not have to be implemented twice.
All of these
more flexibility is available to the programmer in that he may use all the features of the assembler in conjunction with macros.
Functions are combined and it is not necessary to create intermediate files as output from the macros processor and input to the assembler.
None of these

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Operating System (OS)
The advantage of a command processor running only built-in commands is:

users can create system programs and run them as commands
the command set being common across different hardware configurations
flexibility to the users in running lists of commands by simply collecting them in named batch command files
the processing is much faster than would other-wise be the case when user defined commands are used
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
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

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