Why can't reference to child Class object refer to the parent Class object?

Question

I was explaining OOP to my friend. I was unable to answer this question. (How shameful of me? :( )

I just escaped by saying, since OOP depicts the real world. In rea

Answer 1

I think you mean:

Child aChild = aParent;

You did not specify that aChild is of type Child.

The reference to a Child type will mean that you can call members on it that may no exist in the Parent. So, if you assign a Parent object to a Child reference, you will be able to call members that do not exist on the Parent.