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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 Q7 · MCQ · 1 mark
#include <stdio.h>
int main()
{
char s1[7] = "1234", *p;
p = s1 + 2;
*p = '\0';
printf("%s", s1);
}
What will be printed by the 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 segment. #include int main() char s1[7] = "1234", *p; p = s1 + 2; *p = '\0'; printf("%s", s1); What will be printed by the 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.