What is container in spring framework?

Question

1. I was going through this article http://www.vaannila.com/spring/spring-ioc-1.html and here the term container is used. The diagram below shows container. What is contai

Answer 1

Container is used to describe any component that can contain other components inside itself.

As per the Spring documentation here

The BeanFactory interface is the central IoC container interface in Spring. Its
responsibilities include instantiating or sourcing application objects, configuring such objects, and assembling the dependencies between these objects.

IOC is the core principle which Spring uses for Separation of concern concept . No matter what you use - Spring MVC, Security , Core , DAO integrations , you will be using the IOC principle.