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    Compiler Design Practice Questions for GATE CS

    GATE CS Compiler Design: 6 chapters, 43 previous year questions (100% of Compiler Design), 25 practice questions and one solved question from each chapter.

    A question from this chapter

    Question 1
    Level 1: Warm-up

    Which compiler phase is responsible for reading the source code character stream and grouping it into meaningful units called tokens?

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    Compiler Design Practice Questions for GATE CS

    GATE CS Compiler Design: 6 chapters, 43 previous year questions (100% of Compiler Design), 25 practice questions and one solved question from each chapter.

    About Compiler Design Practice Questions

    25 practice questions for Compiler Design in GATE CS, sorted chapter by chapter and graded from basic to exam level, each with a full solution.

    Compiler Design Weightage in GATE CS

    Compiler Design accounts for 43 of 43 Compiler Design previous year questions in our bank (100%), about 4.3 per paper across 10 papers.

    Compiler Design Chapter Matrix

    ChapterTopicsPYQsShare of unit PYQsPractice questions
    Compiler Phases, Lexical Analysis and Semantic ProcessingCompiler Phases, Front-End, Back-End and Symbol Tables, Lexical Tokens, Regular Expressions and Finite Automata, Semantic Analysis and Syntax-Directed Type Checking, Lexical, Syntax and Semantic Error Classification921%25
    Top-Down and Predictive ParsingFIRST and FOLLOW Set Computation, LL(1) Grammar Conditions and Predictive Parsing, LL(1) Parsing Table Construction614%0
    Bottom-Up and LR ParsingBottom-Up Parser Types and LR Grammar Classes, Operator Precedence and Shift-Reduce Parsing, LR Item Closure and GOTO Computation, LR Parsing Conflicts and Grammar Ambiguity819%0
    Syntax-Directed Translation and Intermediate RepresentationsBackpatching and Control-Flow Code Generation, Syntax-Directed Definitions and Attribute Evaluation, Intermediate Representations and Triple Code921%0
    Runtime Environments and Procedure CallsActivation Trees and Procedure Call Sequences25%0
    Basic Blocks, Data-Flow Analysis and Code OptimizationBasic Blocks and Control-Flow Graph Construction, Live Variables and Data-Flow Analysis, DAG Optimization, Common Subexpressions and Available Expressions921%0

    More from Compiler Design

    One Solved Question from Each Compiler Design Chapter

    Question 1 · Compiler Phases, Lexical Analysis and Semantic Processing MCQ

    Which compiler phase is responsible for reading the source code character stream and grouping it into meaningful units called tokens?

    1. A.

      Lexical Analyzer

    2. B.

      Syntax Analyzer

    3. C.

      Semantic Analyzer

    4. D.

      Intermediate Code Generator

    Correct Answer:

    A

    Step-by-Step Solution

    Key idea: This is a direct recall question about compiler phase responsibilities.

    Step 1: Recall the primary function of the Lexical Analyzer. It scans the source code character by character and groups them into meaningful sequences called tokens (e.g., keywords, identifiers, operators).

    Step 2: Verify other options. Syntax Analyzer builds parse trees from tokens. Semantic Analyzer checks for logical consistency and type compatibility. Intermediate Code Generator produces an abstract intermediate representation.

    Answer: A