Inversion of Control and Dependency Injection is a core design pattern of Spring framework. IOC and DI design pattern is also a popular design pattern interview question in Java. As the name suggest Inversion of control pattern Inverts responsibility of managing the life cycle of the object e.g. creating an object, setting their dependency etc from application to a framework, which makes writing Java application even more easy.
Read more: http://javarevisited.blogspot.com/2012/12/inversion-of-control-dependency-injection-design-pattern-spring-example-tutorial.html#ixzz4xve86pPN
