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What is CFG?

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What is CFG?

(a) Compiler

(b) A language expression

(c) Regular Expression

(d) None of the mentioned

I got this question in quiz.

This key question is from Right Left Linear Grammar topic in portion Contextfree Grammar and Syntax Analysis of Compiler

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The correct answer is (b) A language expression

To explain I would say: They are defined by rule A->b where A is non terminal and b is terminal.

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