a2zinterviews

9.	What do you understand by Servlet Mapping?
	Servlet mapping defines an association between a URL pattern and a servlet. You can use servlet to process a number of url patterns (request pattern). For example, in case of Struts *.do url patterns are processed by Struts Controller Servlet.
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10.	What is meant by web application?
	A web application is a collection of servlets and contents installed under a specific subset of the server's URL namespace such as / catalog and possibly installed via a .war file.
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11.	What is ServletContext?
	ServletContext is an interface that defines a set of methods that a servlet uses to communicate with its servlet container, for example, to get the MIME type of a file, dispatch requests or writes to a log file. There is one context per "web application" per Java Virtual Machine.
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12.	What are the type of protocols supported by HTTPServlet?
	It extends the GenericServlet base class and provides a framework for handling the HTTP protocol. So, HTTPServlet only supports HTTP and HTTPS protocol.
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