Lexical Analyser MCQ

Test your knowledge with important Lexical Analyser MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Lexical Analyser MCQs at Bissoy

• What is the output of a lexical analyzer?
  ক

  Machine Code

  খ

  Intermediate Code

  গ

  Stream of Token

  ঘ

  Parse Tree
• Which of the lexical analyser can handle Unicode?
  ক

  Java CC

  খ

  JFLex

  গ

  Quex

  ঘ

  All of the mentioned
• Which one is a lexer Generator?
  ক

  ANTLR

  খ

  DRASTAR

  গ

  FLEX

  ঘ

  All of the mentioned
• Lexers are often generated by a lexer generator, same as parser generators.
  ক

  True

  খ

  False
• What goes over the characters of the lexeme to produce value?
  ক

  Scanner

  খ

  Parser

  গ

  Evaluator

  ঘ

  Lexical generator
• It has encoded within it information on the possible sequences of characters that can be contained within any of the tokens it handles. The mentioned function is performed by?
  ক

  Scanner

  খ

  Parser

  গ

  Syntactic Analyser

  ঘ

  All of the mentioned
• Two Important lexical categories are __________
  ক

  White Space

  খ

  Comments

  গ

  None of the mentioned

  ঘ

  White Space & Comments
• Which grammar defines Lexical Syntax?
  ক

  Regular Grammar

  খ

  Syntactic Grammar

  গ

  Context free Grammar

  ঘ

  Lexical Grammar
• When expression sum=3+2 is tokenized then what is the token category of 3?
  ক

  Identifier

  খ

  Assignment operator

  গ

  Integer Literal

  ঘ

  Addition Operator
• The process of forming tokens from an input stream of characters is called __________
  ক

  Liberalisation

  খ

  Characterisation

  গ

  Tokenization

  ঘ

  None of the mentioned
• A ________ is a string of characters which form a syntactic unit.
  ক

  Lexeme

  খ

  Lex

  গ

  Lexeme & Lex

  ঘ

  None of the mentioned
• Which one is a type of Lexeme?
  ক

  Identifiers

  খ

  Constants

  গ

  Keywords

  ঘ

  All of the mentioned
• Lexical Analysis Identifies Different Lexical Units in a _______
  ক

  Source Code

  খ

  Object Code

  গ

  Lexeme

  ঘ

  None of the mentioned
• Input to Lexical Analyser is _________
  ক

  Source Code

  খ

  Object Code

  গ

  Lexeme

  ঘ

  None of the mentioned
• Which phase of the compiler is Lexical Analyser?
  ক

  First

  খ

  Second

  গ

  Third

  ঘ

  None of the mentioned
• Lexical Analyser’s Output is given to Syntax Analysis.
  ক

  True

  খ

  False
• An individual token is called ________
  ক

  Lexeme

  খ

  Lex

  গ

  Lexeme & Lex

  ঘ

  None of the mentioned
• What is another name for Lexical Analyser?
  ক

  Linear Phase

  খ

  Linear Analysis

  গ

  Scanning

  ঘ

  All of the mentioned
• The context free grammar is ambiguous if ______________
  ক

  The grammar contains non-terminals

  খ

  Produces more than one parse tree

  গ

  Production has two non-terminals side by side

  ঘ

  None of the mentioned
• In a compiler the module that checks every character of the source text is called __________
  ক

  The code generator

  খ

  The code optimizer

  গ

  The lexical analyzer

  ঘ

  The syntax analyzer