Programming and Data Structures · Programming in C
Official IIT answer key · IISc Bangalore · Audited Aug 2026
GATE CSE 2024 Set 2 Q13 · MCQ · 1 mark
#include <stdio.h>
int g(int p) { printf("%d", p); return p; }
int h(int q) { printf("%d", q); return q; }
void f(int x, int y) {
g(x);
h(y);
}
int main() {
f(g(10),h(20));
}
Which one of the following options is the CORRECT output of the above C program?Key concept
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Topic notes
In GATE CS, Programming in C is tested extensively through rigorous code tracing, pointer mechanics, and fundamental semantics rather than high-level syntax trivia. Questions emphasize pointer arithmetic and multidimensional array decay, storage classes (especially static local variables), evaluation order, side effects of increment/decrement operators, parameter passing mechanisms (pass-by-value vs pass-by-reference), and recursive program state tracking. The topic features a nearly balanced split between NAT and MCQ items across 1-mark and 2-mark categories, demanding precise, bug-free execution traces without a compiler.
Full Programming in C guide →Consider the following C program. Assume parameters to a function are evaluated from right to left. #include int g(int p) printf("%d", p); return p; int h(int q) printf("%d", q); return q; void f(int x, int y) g(x); h(y); int main() f(g(10),h(20)); Which one of the following options is the CORRECT output of the above C program?
Topic-wise GATE CS PYQs with verified steps
Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.