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Context Free Grammar & Context Free Language Video Lecture | Theory of Computation - Computer Science Engineering (CSE)

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FAQs on Context Free Grammar & Context Free Language Video Lecture - Theory of Computation - Computer Science Engineering (CSE)

1. What is a context-free grammar?
Ans. A context-free grammar is a formal grammar that consists of a set of production rules used to generate strings in a language. It is widely used in computer science and linguistics to describe the syntax of programming languages and natural languages.
2. What is a context-free language?
Ans. A context-free language is a language that can be generated by a context-free grammar. It is a type of formal language that can be recognized by a pushdown automaton, which is a theoretical model of computation.
3. How are context-free grammars represented?
Ans. Context-free grammars are typically represented using a set of production rules, also known as rewrite rules. Each rule consists of a nonterminal symbol on the left-hand side and a sequence of terminals and/or nonterminals on the right-hand side. These rules define how the nonterminal symbols can be replaced or expanded.
4. What are some examples of context-free languages?
Ans. Some examples of context-free languages include programming languages like C, Java, and Python, as well as natural languages like English. These languages can be described using context-free grammars that specify the syntax and structure of valid sentences or programs.
5. How are context-free grammars used in parsing?
Ans. Context-free grammars play a crucial role in parsing, which is the process of analyzing a string of symbols to determine its structure according to a given grammar. Parsing algorithms, such as the CYK algorithm or the Earley parser, use context-free grammars to parse and validate the syntax of programming languages or natural languages.
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