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Explain why HttpServlet is declared abstract.- The Constructor HttpServlet() does nothing because this is an abstract class.
- Default implementation in a few java classes like HttpServlet don’t really do anything. Hence, they need to be overridden.
- Usually one of the following methods of HttpServlet must be overridden by a subclass:
1. doGet: - If the servlet supports HTTP GET requests.
2.doPost: - HTTP POST requests.
3. doPut: - HTTP PUT requests.
4. doDelete: - HTTP DELETE requests.
5. init() and destroy(): - To manage resources.
6. getServletInfo: - To provide information.
- However, there doesn’t seem to be any reason why the service method should be overridden because it eventually dispatches the task to one of the doXXX methods.What is the GenericServlet class?- GenericServlet makes writing servlets easier.
- To write a generic servlet, all you need to do is to override the abstract service method.
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