Solution

The correct answer is A-III, B-IV, C-I, D-II.

Key Points

• Matching LIST-I with LIST-II involves identifying the correct compiler phases corresponding to each input or output representation.
• Syntax Tree is associated with the Semantic Analyzer.
• Character Stream is handled by the Lexical Analyzer.
• Intermediate Representation is generated by the Code Generator.
• Token Stream is produced by the Syntax Analyzer.

Additional Information

• Compiler Phases and Their Functions:
  • Lexical Analyzer: Converts a sequence of characters (character stream) into tokens (token stream).
  • Syntax Analyzer: Checks for syntactical correctness and generates a syntax tree.
  • Semantic Analyzer: Ensures semantic correctness and performs type checking using the syntax tree.
  • Code Generator: Produces intermediate code representation or low-level code from the syntax tree.
• Importance of Intermediate Representation:
  • It serves as an abstraction between the source code and the target machine code.
  • Allows optimizations to be performed before the final code generation.
• Role of Tokens in Compilation:
  • Tokens are the smallest units of a program, like keywords, operators, and identifiers.
  • The token stream is essential for the syntax analyzer to build the syntax tree.