Injection object with property of type Collection (List, Set, Map) - Type conversion also happens.
Autowireing and different types.
Scope of the bean (singleton - default, prototype , .... ,. request, session, globalSession)
ApplicationContextAware and BeanNameAware
Inheritance of bean definitions - also adding values to collection type properties.
Callbacks - call methid right after bean is initialized or just before bean is destroyed - with spring provide3d methods.
Callbacks -  Definig our on methods and cofiguring in spring-config file, also what if both ways are used - both get executed.
Lepotni - push