Pointers & Strings in C

Which of the following pointer is Wild

• int *p;

• int *q=&a;

• int *v=NULL;

• void *g;

What is the main drawback of pointers

• Complexity to mange pointers

• Difficult to write program

• They are not safe

What is the output of the following Code:

#include <stdio.h>

int main()

{

int *p;

int a=10;

p=&a;

*p=34;

printf("%d,%d",a,*p);

return 0;

}

• 34,34

• 10,10

• 10,34

• 34,10

What is the output of the following code:

#include <stdio.h>

int main()

{

void *z;

float s=1.2;

z=&s;

printf("%f",*z);

return 0;

}

• Compile time error

• 1.20000

• 1.2

• Run time error

What is the output of the following code:

#include <stdio.h>

int main()

{

int *p;

int a=20;

p=&a;

int **q;

**q=100;

q=&p;

*p=50;

printf("%d,%d,%d",**q,a,*p);

return 0;

}

• 50,50,50

• 20,20,50

• 100,50,20

• 100,20,50

What is the output of the following code snippet:

int a=45,b=67;

int *s,*q;

s=&a;q=&b;

printf("%d",s+q);

• Compile time error

• 112

• Garbage value

• 0

Which of the following operators are not used with pointers

• *

• /

• %

• -

What is the output of the following code:

int a[]={1,2,33,4,4,6}

int *p;

p=a;

*(p+2)=25;

printf("%d,%d",*(p+2),2[a]);

• 25,25

• 25,4

• 25, garbage value

• Compile time error

Which of the following pointers leads to memory leaks

• Wild Pointers

• Dangling Pointers

• NULL Pointers

• Generic Pionters

Which of the following is related to pointer to an array concept in C

• int a[]={1,2,2,22};

  int *p;

  p=a;

• int (*p)[3];

  int a[]={1,2,3};

  p=&a;

• int *p[3];

  int a[]={1,2,2};

  p=a;

• int **a[];