Compilers Questions and Answers – Lexical Analyser – 1

This set of Compilers Multiple Choice Questions & Answers (MCQs) focuses on “Lexical Analyser – 1”.

1. In a compiler the module that checks every character of the source text is called __________
a) The code generator
b) The code optimizer
c) The lexical analyzer
d) The syntax analyzer
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2. The context free grammar is ambiguous if ______________
a) The grammar contains non-terminals
b) Produces more than one parse tree
c) Production has two non-terminals side by side
d) None of the mentioned
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3. What is another name for Lexical Analyser?
a) Linear Phase
b) Linear Analysis
c) Scanning
d) All of the mentioned
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4. An individual token is called ________
a) Lexeme
b) Lex
c) Lexeme & Lex
d) None of the mentioned
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5. Lexical Analyser’s Output is given to Syntax Analysis.
a) True
b) False
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6. Which phase of the compiler is Lexical Analyser?
a) First
b) Second
c) Third
d) None of the mentioned
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7. Input to Lexical Analyser is _________
a) Source Code
b) Object Code
c) Lexeme
d) None of the mentioned
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8. Lexical Analysis Identifies Different Lexical Units in a _______
a) Source Code
b) Object Code
c) Lexeme
d) None of the mentioned
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9. Which one is a type of Lexeme?
a) Identifiers
b) Constants
c) Keywords
d) All of the mentioned
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10. A ________ is a string of characters which form a syntactic unit.
a) Lexeme
b) Lex
c) Lexeme & Lex
d) None of the mentioned
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Sanfoundry Global Education & Learning Series – Compilers.

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