What are the main classes which are used in struts application?

 This is another beginner’s level Struts interview question which is used to check how familiar candidate is with Struts framework and API. Main classes in Struts Framework are:

Action servlet: it’s a back-bone of web application it’s a controller class responsible for handling the entire request.
Action class: using Action classes all the business logic is developed us call model of the application also.
Action Form: it’s a java bean which represents our forms and associated with action mapping. And it also maintains the session state its object is automatically populated on the server side with data entered from a form on the client side.
Action Mapping: using this class we do the mapping between object and Action.
ActionForward: this class in Struts is used to forward the result from controller to destination.