Which of the following statements are correct about an array?

1. The array int num[26]; can store 26 elements
2. The expression num[1] designates the very first element in the array
3. It is necessary to initialize the array at the time of declaration.
4. The declaration num[SIZE] is allowed if SIZE is a macro.

What is output?

 In C++ one can define a function within another function.

In the following code what would be the values of i1 and i2

One can apply pointer arithmetic with reference variables. 

There can be a null reference.

Which of the following is a valid function call (assuming the function exists)?

What is output?

 A float is 4 byte wide, whereas a double is 8 byte wide

What is output?

 Is the following statement a declaration or definition?

What is output?

I want a nonmember function to have access to the private members of a class. The class must declare that function:

C++ is a pure object oriented programming language.

What is output of code?

When does the code block following while(x<100) execute?

All C++ functions are recursive.

Size of short integer and long integer would vary from one platform to another

What is output?

 What is output of code?

What will be the output of the program?