Difference between one-to-many and many-to-one relationship

Question

What is the real difference between one-to-many and many-to-one relationship? It is only reversed, kind of?

I can\'t find any \'good-and-easy-to-understand\' tutoria

Answer 1

one-to-many has parent class contains n number of childrens so it is a collection mapping.

many-to-one has n number of childrens contains one parent so it is a object mapping