What will be the output of the following C++ code?

Which of the following visibility labels is invalid while inheriting a class?

Which header file is used for reading and writing to a file?

What is the correct syntax for an operator conversion?

What is the value of the variable i after the following C code is executed?

i = scanf("%d %d", &a, &b);

What will happen if a class is not having any name?

 What will happen when defining the enumerated type?

Why is the #pragma warn directive used in the preprocessor?

What will be the output?

#include <stdio.h>

int main()

{

   char *_ptr = malloc(100);

   strcpy(_ptr, "abc");

   memset(_ptr, NULL, sizeof(_ptr));

   if(*_ptr == NULL)

   printf("NULL");

   else

   printf("%s",_ptr);

return 0;

}

When is the "void" keyword used in a function?