GATE CS 2019 Set 1 — Question 46

MCQ+2 / -0.67MediumAttribute GrammarsSemantic AnalysisCompiler DesignSyntax-Directed Translation

Compiler Design → Semantic Analysis → Attribute Grammars

Last updated 5 September 2026

Question

X_1, X_2, X_3, X_4, X_5

Production rule	Semantic action
$D \rightarrow T \ L$	$X_1.type = X_2.type$
$T \rightarrow \text{int}$	$T.type = \text{int}$
$T \rightarrow \text{float}$	$T.type = \text{float}$
$L \rightarrow L_1, \text{id}$	$X_3.type = X_4.type$ addType(id.entry, $X_5.type$ )
$L \rightarrow \text{id}$	addType(id.entry, $X_6.type$ )

T

Review answer and solution without JavaScript

Interactive answer checking needs JavaScript. The published solution is available below.

T

Continue learning with Success Tracker

Use Success Tracker to ask about the reasoning, then try another GATE CS question to check your understanding.

AI-powered practice· Unlimited practice on eligible plans

PYQs with solutions: Attempt available previous-year questions, then compare your reasoning with the worked solution. Coverage varies by stream.
Practice that adapts: Choose a topic, work on weaker areas and bookmark questions to revisit. Your attempts feed your progress tracking.
AI doubt support: Ask follow-up questions about a step or concept while practising, instead of stopping at the final answer.

Unlimited practice is available on eligible plans. Free practice and AI usage have limits; check the current plan allowances before choosing.

This page stays readable without an account. AI responses can be wrong; check them against the solution and source material.