Matching Compiler Concepts to Phases

This question requires matching concepts from LIST-I with the corresponding phases of a compiler listed in LIST-II. The correct matching is determined by understanding the role of each phase.

A. Syntax Tree matched with III. Semantic Analyzer

The Syntax Tree represents the grammatical structure of the code. The Semantic Analyzer processes this tree to check for type consistency, variable declarations, and other meaning-related rules.

B. Character Stream matched with IV. Lexical Analyzer

The Character Stream is the raw sequence of input characters from the source code. The Lexical Analyzer (also known as the scanner) reads this stream to identify and group characters into meaningful tokens.

C. Intermediate Representation matched with I. Code Generator

Intermediate Representation (IR) is a representation of the source code that is machine-independent but closer to machine code than the source. The Code Generator phase takes this IR as input to produce the final target machine code.

D. Token Stream matched with II. Syntax Analyzer

The Token Stream is the sequence of tokens produced by the Lexical Analyzer. The Syntax Analyzer (also known as the parser) takes this stream as input to verify the grammatical structure according to the language's rules, often building a syntax tree.

Final Matching

Based on the analysis, the correct matches are:

• A -> III (Syntax Tree -> Semantic Analyzer)
• B -> IV (Character Stream -> Lexical Analyzer)
• C -> I (Intermediate Representation -> Code Generator)
• D -> II (Token Stream -> Syntax Analyzer)

This corresponds to the option A-III, B-IV, C-I, D-II.