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In lexical analysis, what is a 'token'?

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Question: In lexical analysis, what is a \'token\'?

Options:

  1. A sequence of characters in the source code
  2. A data structure representing a keyword or identifier
  3. A type of error in the source code
  4. A part of the syntax tree

Correct Answer: A data structure representing a keyword or identifier

Solution: 

A token is a data structure that represents a keyword, identifier, or other meaningful element in the source code.

In lexical analysis, what is a 'token'?

Practice Questions

Q1
In lexical analysis, what is a 'token'?
  1. A sequence of characters in the source code
  2. A data structure representing a keyword or identifier
  3. A type of error in the source code
  4. A part of the syntax tree

Questions & Step-by-Step Solutions

In lexical analysis, what is a 'token'?
  • Step 1: Understand that in programming, source code is made up of different parts like keywords, identifiers, and symbols.
  • Step 2: Know that a 'token' is a way to group these parts into meaningful pieces.
  • Step 3: Realize that each token represents a specific type of element, like a word or symbol in the code.
  • Step 4: Remember that tokens help the computer understand the structure and meaning of the code.
  • Token – A token is a data structure that represents a keyword, identifier, or other meaningful element in the source code.
  • Lexical Analysis – The process of converting a sequence of characters in source code into a sequence of tokens.
  • Data Structure – A way of organizing and storing data so that it can be accessed and modified efficiently.
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