Language Processors
The table created by lexical analysis to describe all literals used in the source program, is:

Identifier table
Literal table
Reductions
Terminal table

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Language Processors
Bug means

A logical error in a program
Documenting programs using an efficient documentation tool
All of these
A difficult syntax error in a program

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Language Processors
A base register table

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
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

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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
recognition of basic elements and creation of uniform symbols
creation of more optional matrix
recognition of basic syntactic constructs through reductions

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