Spring Application Framework has been in action for quite a long time, and programmers have developed several conventions, usage patterns, and idioms during that time period. In this example, we will try to explain some of them and give examples to illustrate how to apply them in your projects. Most of the bean definitions in Spring ApplicationContext are singleton scope, and again they are mostly sole bean definitions of their classes in the application. Developers therefore, give them names same as with their class or interface names in order to easily match with bean definitions with their classes. That way, it becomes easier to go from beans to their classes or vice versa.