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Programming and Data Structures · Programming in C
Official IIT answer key · IIT Kanpur · Audited Aug 2026
GATE CSE 2015 Set 3 Q26 · NAT · 1 mark
#include<stdio.h>
int main( )
{
static int a[ ] = {10, 20, 30, 40, 50};
static int *p[ ] = {a, a+3, a+4, a+1, a+2};
int **ptr = p;
ptr++;
printf("%d%d", ptr-p, **ptr);
}
The output of 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 main( ) static int a[ ] = 10, 20, 30, 40, 50; static int *p[ ] = a, a+3, a+4, a+1, a+2; int ptr = p; ptr++; printf("%d%d", ptr-p, ptr); The output of 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.