Compiler Design - Lexical analysis & Parsing


Terminal table

A. contains all constants in the program.
B. is a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure.
C. consist of a full or partial list of the token is as they appear in the program created by lexical analysis and used for syntax analysis and interpretation.
D. is a permanent table which lists all keywords and special symbols of the language in symbolic form

Option: D

Explanation :


Advantage of incorporating the macro-processor into pass 1 is that

A. many functions have to be implemented twice
B. functions are combined and it is not necessary to create intermediate files as output from the macro-processor and input to the assembler.
C. more flexibility is available to the programmer in that he may use all the features of the assembler in conjunction with macros.
D. all of these

Option: D

Explanation :


 Which of the following is a phase of a compilation process ?

A. Lexical analysis
B. Code generation
C. Both (a) and (b)
D. None of these

Option: C

Explanation :


System program such a s compiler are designed so that they are

A. re-enterable
B. non-reusable
C. serially usable
D. None of these

Option: A

Explanation :


A series of statements explaining how the data is to be processed is called

A. assembly
B. machine
D. program

Option: D

Explanation :

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Syllabus Covered in this section is

  • Compilation and Interpretation 
  • Bootstrap compilers
  • Phases of compilation process
  • Lexical analysis
  •  Context free grammars
  • Parsing and parse trees
  • Representation of parse (derivation) trees as rightmost and leftmost derivations
  • Bottom up parsers-shift-reduce, operator precedence and LR
  • Topdown parsers-left recursion and its· removal.
  • Recursive descent parser.
  • Predictive parser
  • Intermediate codes-Quadruples, Triples
  • Intermediate code generation
  • Target code generation
  • Basics of  Code optimization
  • Syntax directed translation
  • Runtime environments

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