Define parse tree. What are the conditions for constructing a parse tree from a CFG ?
A parse tree is like a family tree for a sentence in a programming language or any other context-free language. It shows how the sentence … Read more
Compiler Design PYQ
Describe grammar.
When writing a grammar, it’s important to ensure that variables and terminals are distinct, meaning no terminal can be a non-terminal and vice versa. In … Read more
Explain the term token, lexeme and pattern.
Token: Lexeme: Pattern:
Write short notes on lexical analyzer generator.
A lexical analyzer generator, such as LEX, is a tool used in compiler design to automate the process of creating a lexical analyzer, which is … Read more
Explain the implementation of lexical analyzer.
Lexical analyzer can be implemented in following step : 5. DFA (Deterministic Finite Automaton): NFAs are converted into DFAs, which are simpler versions of NFAs … Read more
How does finite automata useful for lexical analysis ?
Finite automata are useful for lexical analysis because they provide a systematic way to recognize patterns in a sequence of characters, which is essential for … Read more
What do you mean by regular expression ? Write the formal recursive definition of a regular expression.
1.Regular expression is a formula in a special language that is used for specifying simple classes of strings. 2.A string is a sequence of symbols; … Read more