600+ Servlet Interview Questions Practice Test

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1. ServletContext: It’s created as soon as for all the net utility by the net container at deployment time, not per consumer session. It’s used to work together with the servlet container, and whereas it could retailer non permanent knowledge, its major goal is to offer a solution to interface with the server that hosts the net utility.
2. HttpServlet Distinction: The doGet() and doPost() strategies in HttpServlet are particularly designed to deal with HTTP GET and POST requests, respectively. They aren’t for initializing or finalizing the servlet however quite for processing based mostly on the kind of HTTP request obtained.
3. Filter vs Servlet: The principle distinction between a Filter and a Servlet is their meant use inside net purposes. Filters can be utilized to preprocess incoming requests and postprocess outgoing responses earlier than they attain the precise Servlet or JSP (JavaServer Pages). Filters don’t generate dynamic content material by themselves; as an alternative, they modify the requests and responses for numerous functions comparable to logging, authentication, and knowledge compression.
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