Backus-Naur Form (BNF) Overview

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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?

Regular grammars Signup and view all the answers

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

Defining the syntax through rules Signup and view all the answers

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

Metalanguage Signup and view all the answers

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

The element can be repeated zero or more times Signup and view all the answers

What feature does '*' represent in EBNF notation?

The element can be repeated zero or more times Signup and view all the answers

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

The element is optional Signup and view all the answers

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

Specifying semantic properties along with syntax Signup and view all the answers

Backus-Naur Form (BNF) Overview

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Questions and Answers

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

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

What is the key role of a language recognizer?

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

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

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

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

What feature does '*' represent in EBNF notation?

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

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

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