What is (void*)0?

What is (void*)0?

Representation of NULL pointer

Representation of void pointer

Error

None of above

Answer : A

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1) What will be the output of the following C code?

 #include <stdio.h>
 int x = 0;
 void main()
 {
     int *const ptr = &x;
     printf("%p\n", ptr);
     ptr++;
     printf("%p\n ", ptr);
 }

2) What will be the output of the following C code?

 #include <stdio.h>
 int main()
 {
     int *ptr, a = 10;
     ptr = &a;
     *ptr += 1;
     printf("%d,%d/n", *ptr, a);
 }

10,10

10,11

11,10

11,11

3) Can you combine the following two statements into one?

   char *p; 
   p = (char*) malloc(100);

char p = *malloc(100);

char *p = (char) malloc(100);

char *p = (char*)malloc(100);

char *p = (char *)(malloc*)(100);

4) What will be the output of the program ?

 #include<stdio.h>
 int main()
 {
     int i=3, *j, k;
     j = &i;
     printf("%d\n", i**j*i+*j);
     return 0;
 }

30

27

9

3

5) What will be the output of the following C code?

 #include <stdio.h>
 int main()
 {
    int i = 10;
    void *p = &i;
    printf("%f\n", *(float*)p);
    return 0;
 }

Compile time error

Undefined behaviour

10

0.000000