a2zinterviews

9.	What are the uses of Servlets?
	Servlets are used to process the client request. A Servlet can handle multiple requests concurrently and be used to develop high performance system. A servlet can be used to load balance among several servers, as servlet can easily forward requests.
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10.	What are the differences between Servlets and Applets?
	Servlets are server side components that runs on the Servlet container. Applets are client components and run on the web browsers. Servlets have no GUI interface.
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11.	What are the different ways we can maintain state between requests?
	Following are the different ways of maintaining states between stateless requests URL rewriting Cookies Hidden fields Sessions
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12.	What is the difference between authentication and authorization?
	Authentication is the process the application identifies that you are who. For example when a user logs into an application with a username and password, application checks that the entered credentials against its user data store and responds with success or failure. Authorization, on the other hand, is when the application checks to see if you are allowed to do something. For instance are you allowed to do delete or modify a resource.
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