GATE CS 2017 Set 2 — Question 5

MCQ+1 / -0.33EasyCompiler Design

Compiler Design

Last updated 5 September 2026

Question

Match the following according to input (from the left column) to the compiler phase (in the right column) that processes it: Input Compiler Phase (P) Syntax tree (i) Code generator (Q) Character stream (ii) Syntax analyzer (R) Intermediate representation (iii) Semantic analyzer (S) Token stream (iv) Lexical analyzer

Input	Compiler Phase
(P) Syntax tree	(i) Code generator
(Q) Character stream	(ii) Syntax analyzer
(R) Intermediate representation	(iii) Semantic analyzer
(S) Token stream	(iv) Lexical analyzer

Correct answer (C) P arrow (iii), Q arrow (iv), R arrow (i), S arrow (ii) Solution The compiler phases and their typical inputs are: Lexical analyzer : Processes the character stream (Q) to produce a token stream. Syntax analyzer : Processes the token stream (S) to produce a syntax tree. Semantic analyzer : Processes the syntax tree (P) for type checking and other semantic rules. Code generator : Processes the intermediate representation (R) to produce target code. Matching: P-(iii), Q-(iv), R-(i), S-(ii). Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (C) P arrow (iii), Q arrow (iv), R arrow (i), S arrow (ii) Solution The compiler phases and their typical inputs are: Lexical analyzer : Processes the character stream (Q) to produce a token stream. Syntax analyzer : Processes the token stream (S) to produce a syntax tree. Semantic analyzer : Processes the syntax tree (P) for type checking and other semantic rules. Code generator : Processes the intermediate representation (R) to produce target code. Matching: P-(iii), Q-(iv), R-(i), S-(ii).

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