Which of the following best describes the relationship between a lexer and a par

Practice Questions

Q1
Which of the following best describes the relationship between a lexer and a parser?
  1. The lexer generates machine code, while the parser checks syntax
  2. The lexer produces tokens, which the parser uses to build a syntax tree
  3. The lexer and parser perform the same function
  4. The parser generates tokens, while the lexer checks syntax

Questions & Step-by-Step Solutions

Which of the following best describes the relationship between a lexer and a parser?
  • Step 1: Understand that a lexer (or lexical analyzer) is a tool that takes raw code as input.
  • Step 2: The lexer breaks down the raw code into smaller pieces called tokens. Tokens are meaningful units like keywords, operators, and identifiers.
  • Step 3: The parser is another tool that takes these tokens produced by the lexer as input.
  • Step 4: The parser uses the tokens to analyze their structure and build a syntax tree, which represents the grammatical structure of the code.
  • Step 5: The lexer and parser work together in the compilation process, where the lexer prepares the tokens and the parser organizes them into a structured format.
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