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

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

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Language Processors
Terminal Table

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
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

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Language Processors
A base register table

is a term that refers to the control programs of an operating system
allows multiple programs to reside in separate areas of core at the same time
allows the programmer to write base registers and displacements explicitly in the source program
is used to remember which of the general-purpose registers are currently available as base registers, and what base addresses they contain

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