In Struts 1 there is no tag which map any global action , whenever you call action its get map in struts-config.xml , and respective Action class gets called . In Struts 2, you can map any unmatched action to a JSP page like this :
2. What is the scope of ActionForm in struts? ( give me all scops in struts)
The scope is request (Not sure about this )
3. What are the types of Actions available in struts?
You can find the informayion about Action classes here.