Which of the following is an indirection operator?

A variable defined within a block is visible:

  What does ‘\a’ escape code represent?

Which function is used to check whether a vector is empty or not?

 How compile-time polymorphisms are implemented in C++? 

A function which is used to replace the implementation provided by the base class is called:

What is the output of the following program?

main()

{

char *a[4]={"","oracle","java"};

printf("%d %d",sizeof(a),sizeof(char*));

}

#include<stdio.h>

int main()

{

        int a, b;

        a = 1;

        b = 2;

        {

               int a = 10;

               a++;

               b++;

        }

        printf("%d %d", a, b);

}

Consider the two code snippets below for printing a vector. Is there any advantage of one version over the other?