Language Processors
In analyzing the compilation of PL/I program, the term "Machine independent optimization" is associated with

use of macro processor to produce more optimal assembly code
creation of more optional matrix
recognition of basic syntactic constructs through reductions
recognition of basic elements and creation of uniform symbols

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Language Processors
Indicate which of the following is not true about 4GL?

All of these
Many database management system packages support 4GLs
4GL does not support a high-level of screen interaction
A 4GL is a software tool which is written, possibly, in some third generation language

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Language Processors
A compiler is

program that accepts a program written in a high level language and produces an object program
a program that places programs into memory and prepares them for execution
is a program that appears to execute a source program as if it were machine language
a program that automate the translation of assembly language into machine language

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Language Processors
Terminal 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
consists of a full or partial list of the tokens as they appear in the program. Created by Lexical analysis and used for syntax analysis and interpretation

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