What is a void pointer and what is a null pointer?

Question

So I was going through some interview questions and I came across one about void and null pointers, which claims:

a pointer with no return type is cal

Answer 1

Please, tell us: whats the difference:

• between gas tank and no-gas situation
• between cookie jar and no-cookies
• between term 'money' and 'empty pockets'

If you come up with these, you'l be able to grasp null vs void* dillema.