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What is a 'lexeme' in the context of lexical analysis?

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Question: What is a \'lexeme\' in the context of lexical analysis?

Options:

  1. The smallest unit of meaning in a programming language
  2. The actual sequence of characters that matches a token
  3. A type of syntax error
  4. A representation of a variable in the symbol table

Correct Answer: The actual sequence of characters that matches a token

Solution: 

A lexeme is the actual sequence of characters in the source code that matches a token.

What is a 'lexeme' in the context of lexical analysis?

Practice Questions

Q1
What is a 'lexeme' in the context of lexical analysis?
  1. The smallest unit of meaning in a programming language
  2. The actual sequence of characters that matches a token
  3. A type of syntax error
  4. A representation of a variable in the symbol table

Questions & Step-by-Step Solutions

What is a 'lexeme' in the context of lexical analysis?
  • Step 1: Understand that a lexeme is a part of programming code.
  • Step 2: Know that lexemes are made up of characters, like letters and numbers.
  • Step 3: Realize that lexemes represent specific meanings in the code.
  • Step 4: Learn that a token is a category or type that a lexeme belongs to.
  • Step 5: Remember that a lexeme is the actual text that matches a token.
  • Lexeme – A lexeme is the actual sequence of characters in the source code that matches a token.
  • Token – A token is a category or class of lexemes that share a common meaning or function in the programming language.
  • Lexical Analysis – The process of converting a sequence of characters (source code) into a sequence of tokens.
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