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Compiler Design · Lexical Analysis, Parsing and SDT
Official IIT answer key · IIT Bombay · Audited Aug 2026
GATE CSE 2021 Set 2 Q3 · MCQ · 1 mark
int main() {
Integer x;
return 0;
}
Which one of the following phases in a seven-phase C compiler will throw an error?Key concept
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Topic notes
In GATE CS, this foundational topic tests grammar analysis, parsing techniques, and compiler phase interactions through both theoretical properties and computational mechanics. Questions frequently evaluate FIRST/FOLLOW set computation, LL(1) parsing table construction, LR parser capabilities, and bottom-up reduction steps. In addition, conceptual items regularly test front-end compiler phase responsibilities, phase inputs/outputs, and error detection stages.
Full Lexical Analysis, Parsing and SDT guide →Consider the following ANSI C program: int main() Integer x; return 0; Which one of the following phases in a seven-phase C compiler will throw an error?
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Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.