Programming and Data Structures · Programming in C
Official IIT answer key · IIT Delhi · Audited Aug 2026
GATE CSE 2012 Q48 · MCQ · 2 marks
int a, b, c = 0;
void prtFun(void);
main( )
{ static int a = 1; /* Line 1 */
prtFun( );
a += 1;
prtFun( );
printf("
%d %d ", a, b);
}
void prtFun(void)
{ static int a = 2; /* Line 2 */
int b = 1;
a += ++b;
printf("
%d %d ", a, b);
}
What output will be generated by the given code segment?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 →Common Data for Questions 48 and 49: Consider the following C code segment. int a, b, c = 0; void prtFun(void); main( ) static int a = 1; /* Line 1 */ prtFun( ); a += 1; prtFun( ); printf(" %d %d ", a, b); void prtFun(void) static int a = 2; /* Line 2 */ int b = 1; a += ++b; printf(" %d %d ", a, b); What output will be generated by the given code segment?
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