Pointers Questions in C

6.
What is the output:

#include 
void f(int *p, int *q) 
{ 
  p = q; 
  *p = 2; 
} 
int i = 0, j = 1; 
int main() 
{ 
  f(&i, &j); 
  printf("%d %d \n", i, j); 
  getchar(); 
  return 0; 
}

A. 2 2
B. 2 5
C. 0 4
D. 0 2

Answer: D
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7. 

Output ?

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)); 
   return 0;
}

A. 18
B. 19
C. 21
D. 22

Answer: 19
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8.
Output of following program?

#include

int main()

{

    int a = 12;

    void *ptr = (int *)&a;

    printf("%d", *ptr);

    getchar();

    return 0;

}

A. 12

B. Compiler Error

C. Run Time Error

D. 0

Answer: B

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9.

#include

void f(char**);

int main()

{

    char *argv[] = { "ab", "cd", "ef", "gh", "ij", "kl" };

    f(argv);

    return 0;

}

void f(char **p)

{

    char *t;

    t = (p += sizeof(int))[-1];

    printf("%s\n", t);

}

A. ab

B. cd

C. ef

D. gh

Answer: D

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10.

What does the following C-statement declare? [1 mark]

int ( * f) (int * ) ;

A. A function that takes an integer pointer as argument and returns an integer.

B.  A function that takes an integer as argument and returns an integer pointer.

C. A pointer to a function that takes an integer pointer as argument and returns an integer.
D. A function that takes an integer pointer as argument and returns a function pointer.

Answer: C

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