Lexical Analysis MCQ

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

• The phase of compilation which involves type checking is:
  ক

  Parsing

  খ

  Scanning

  গ

  Syntax directed translation

  ঘ

  Semantic Analyzer
• The scanner outputs:
  ক

  Stream of tokens

  খ

  Image file

  গ

  Intermediate code

  ঘ

  Machine code
• Which of the following is the task of lexical analysis?
  ক

  To build the uniform symbol table

  খ

  To initialize the variables

  গ

  To organize the variables in a lexical order

  ঘ

  None of the mentioned
• The action of parsing the source code into proper syntactic classes is known as:
  ক

  Parsing

  খ

  Interpretation analysis

  গ

  Lexicography

  ঘ

  Lexical Analysis
• ____________ is used for grouping up of characters into token.
  ক

  Lexical Analyzer

  খ

  oolex

  গ

  jflex

  ঘ

  All of the mentioned
• Which of the following characters are ignored while lexical analysis?
  ক

  .

  খ

  =

  গ

  #

  ঘ

  WhiteSpace
• Which phase of compiler includes Lexical Analysis?
  ক

  1

  খ

  2

  গ

  3

  ঘ

  Its primary function, not in any phase
• Lexers and parsers are not found in which of the following?
  ক

  compiler front end processing

  খ

  prettyprinters

  গ

  linters

  ঘ

  none of the mentioned
• A program that performs lexical analysis is termed as:
  ক

  scanner

  খ

  lexer

  গ

  tokenizer

  ঘ

  all of the mentioned
• Which among the following is not a tool to construct lexical analyzer from a regular expression?
  ক

  lex

  খ

  flex

  গ

  jflex

  ঘ

  none of the mentioned
• The output of the lexical and syntax analyzer can stated as:
  ক

  parse stream, parse tree

  খ

  token tree, parse tree

  গ

  token stream, parse tree

  ঘ

  all of the mentioned
• among the following statement is correct? Statement 1: When the analyzer scans ‘int’ and ‘intvalue’, it is not able to decide whether the int leads to a keyword or an identifier. Statement 2: Longest Match Rule
  ক

  Statement 1 is assertion, Statement 2 is the reason

  খ

  Statement 1 is assertion, Statement 2 is the solution

  গ

  There is no such Statement 2

  ঘ

  This is not a function of Lexical Analyzer
• State true or false: Statement: A lexical analyzer reads the source code line by line.
  ক

  True

  খ

  False
• The methodology to show an error when the analyzer faces a keyword over an user’s input is based on:
  ক

  rule priority

  খ

  longest match rule

  গ

  keyword-out rule

  ঘ

  none of mentioned
• If the lexical analyser finds a lexeme with the same name as that of a reserved word,it _________
  ক

  overwrites the word

  খ

  overwrites the functionality

  গ

  generates an error

  ঘ

  something else
• Lexemes can be referred to as:
  ক

  elements of lexicography

  খ

  sequence of alphanumeric characters in a token

  গ

  lexical errors

  ঘ

  none of the mentioned
• A programmer by mistakes writes a program to multiply two numbers instead of dividing them, how can this error be detected?
  ক

  Compiler

  খ

  Interpreter

  গ

  Compiler or interpreter

  ঘ

  None of the mentioned
• A system program that brings together separately compiled modules of a program into a form language that is suitable for execution.
  ক

  Assembler

  খ

  Linking loader

  গ

  Cross compiler

  ঘ

  None of the mentioned
• Which of the following is not a feature of compiler?
  ক

  Scan the entire program first and translate into machine code

  খ

  To remove syntax errors

  গ

  Slow for debugging

  ঘ

  Execution time is more
• System program such a compiler are designed so that they are ________
  ক

  Re-enterable

  খ

  Non-Usable

  গ

  Serially usable

  ঘ

  None of the mentioned
• A compiler program written in a high level language is called ________
  ক

  Source Program

  খ

  Object Program

  গ

  Machine Language Program

  ঘ

  None of the mentioned
• Parsing is also known as ________
  ক

  Lexical Analysis

  খ

  Syntax Analysis

  গ

  Semantic Analysis

  ঘ

  Code Generation
• The lexical analyzer takes _________ as input and produces a stream of _______ as output.
  ক

  Source program, tokens

  খ

  Token, source program

  গ

  Either of the two

  ঘ

  None of the mentioned
• What constitutes the stages of the compilation process?
  ক

  Feasibility study, system, design, and testing

  খ

  Implementation and documentation

  গ

  Lexical analysis, syntax, Analysis and code generation

  ঘ

  None of the mentioned
• Which of the following are Lexemes?
  ক

  Identifiers

  খ

  Constants

  গ

  Keywords

  ঘ

  All of the mentioned
• Which concept of grammar is used in the compiler?
  ক

  Lexical analysis

  খ

  Parser

  গ

  Code generation

  ঘ

  Code optimization
• Which concept of FSA is used in the compiler?
  ক

  Lexical analysis

  খ

  Parser

  গ

  Code generation

  ঘ

  Code optimization
• What is an Object program?
  ক

  Program written in machine language

  খ

  Program to be translated into machine language

  গ

  Translation of high-level language into machine language

  ঘ

  None of the mentioned
• Which of the following is true for operator precedence parsing?
  ক

  For all pair of non-terminal

  খ

  For all pair of non-terminals

  গ

  To delimit the handle

  ঘ

  None of the mentioned
• Which symbol table implementation is based on the property of locality of reference?
  ক

  Linear list

  খ

  Search tree

  গ

  Hash Table

  ঘ

  Self Organisation