Language Processors
In analyzing the compilation of PL/I program, the term "Lexical analysis" is associated with

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

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Language Processors
The system/370 assembler language

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

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

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
4GL does not support a high-level of screen interaction

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