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1

GATE CSE 2012

MCQ (Single Correct Answer)
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("\n %d %d ", a, b);
}
void prtFun(void)
{ 
   static int a=2;   /* Line 2 */
   int b=1;
   a+ = ++b;
   printf("\n %d %d ", a, b);
}
What output will be generated by the given code segment if:
Line 1 is replaced by auto int a = 1;
Line 2 is replaced by register int a = 2;
A
$$\eqalign{ & 3\,\,1 \cr & 4\,\,1 \cr & 4\,\,2 \cr} $$
B
$$\eqalign{ & 4\,\,2 \cr & 6\,\,1 \cr & 6\,\,1 \cr} $$
C
$$\eqalign{ & 4\,\,2 \cr & 6\,\,2 \cr & 2\,\,0 \cr} $$
D
$$\eqalign{ & 4\,\,2 \cr & 4\,\,2 \cr & 2\,\,0 \cr} $$
2

GATE CSE 2012

MCQ (Single Correct Answer)
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("\n %d %d ", a, b);
}
void prtFun(void)
{ 
   static int a=2;   /* Line 2 */
   int b=1;
   a+ = ++b;
   printf("\n %d %d ", a, b);
}
What output will be generated by the given code segment?
A
$$\eqalign{ & 3\,\,1 \cr & 4\,\,1 \cr & 4\,\,2 \cr} $$
B
$$\eqalign{ & 4\,\,2 \cr & 6\,\,1 \cr & 6\,\,1 \cr} $$
C
$$\eqalign{ & 4\,\,2 \cr & 6\,\,2 \cr & 2\,\,0 \cr} $$
D
$$\eqalign{ & 3\,\,1 \cr & 5\,\,2 \cr & 5\,\,2 \cr} $$
3

GATE CSE 2008

MCQ (Single Correct Answer)
What is printed by the following C program?
#include < stdio.h >
int f(int x, int *py, int **ppz)
{
   int y, z;
  **ppz += 1; 
   z  = **ppz;
  *py += 2;
   y = *py;
   x += 3;
   return x + y + z;
}
 
void main()
{
   int c, *b, **a;
   c = 4;
   b = &c;
   a = &b; 
   printf( "%d", f(c,b,a));
   getchar();
}
A
18
B
19
C
21
D
22
4

GATE CSE 2006

MCQ (Single Correct Answer)
Consider this C code to swap two integers and these five statements:
void swap(int *px, int *py) 
{ 
    *px = *px - *py; 
    *py = *px + *py; 
    *px = *py - *px; 
}
S1: will generate a compilation error

S2: may generate a segmentation fault at runtime depending on the arguments passed

S3: correctly implements the swap procedure for all input pointers referring to integers stored in memory locations accessible to the process

S4: implements the swap procedure correctly for some but not all valid input pointers

S5: may add or subtract integers and pointers.
A
S1
B
S2 and S3
C
S2 and S4
D
S2 and S5
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Questions Asked from Pointer and Structure in C

On those following papers in Marks 2
Number in Brackets after Paper Indicates No. of Questions
GATE CSE 2019 (1)
GATE CSE 2018 (1)
GATE CSE 2015 Set 1 (1)
GATE CSE 2012 (2)
GATE CSE 2008 (1)
GATE CSE 2006 (1)
GATE CSE 2004 (1)
GATE CSE 2003 (1)
GATE CSE 2001 (1)

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