Backus-Naur Form (BNF) Overview
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Questions and Answers

What is the main focus of syntax in a programming language?

  • The implementation of program units
  • The form of expressions (correct)
  • The execution of statements
  • The meaning of expressions

    • In the statement 'index = 2 * count + 17;', how many lexemes are present?

  • 5
  • 6 (correct)
  • 4
  • 3

    • What is the key role of a language recognizer?

  • Deciding if input strings belong to the language (correct)
  • Generating sentences of a language
  • Describing the meaning of lexemes
  • Defining the syntax of a language

    • Which class of generative devices describes the forms of tokens in programming languages?

    <p>Regular grammars</p> Signup and view all the answers

    What is the purpose of Backus-Naur Form (BNF) in programming language syntax?

    <p>Defining the syntax through rules</p> Signup and view all the answers

    Which term refers to a language used to describe another language?

    <p>Metalanguage</p> Signup and view all the answers

    In EBNF, what does the '+' symbol indicate when used with an element?

    <p>The element can be repeated zero or more times</p> Signup and view all the answers

    What feature does '*' represent in EBNF notation?

    <p>The element can be repeated zero or more times</p> Signup and view all the answers

    In EBNF, what does '?' signify when placed after an element?

    <p>The element is optional</p> Signup and view all the answers

    What aspect of a programming language do attribute grammars primarily focus on?

    <p>Specifying semantic properties along with syntax</p> Signup and view all the answers

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