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Programming and Data Structures · Programming in C
Official IIT answer key · IIT Madras · Audited Aug 2026
GATE CSE 2019 Q18 · NAT · 1 mark
#include <stdio.h>
int jumble(int x, int y){
x=2*x+y;
return x;
}
int main(){
int x=2, y=5;
y=jumble(y,x);
x=jumble(y,x);
printf("%d
", x);
return 0;
}
The value printed by the program is _______.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: #include int jumble(int x, int y) x=2*x+y; return x; int main() int x=2, y=5; y=jumble(y,x); x=jumble(y,x); printf("%d ", x); return 0; The value printed by the program is …
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.