java 13 interview questions and answers

Use the following ways to pass control of a request from one servlet to another or one jsp to another. First is RequestDispatcher object‘s forward method to pass the control. Second is response.sendRedirect method. In Advanced Java, when you want to pass control from one JSP (JavaServer Pages) page to another, you typically use mechanisms … Read more

Yes. However, unlike Servlet, you are not required to implement HTTP-protocol specific methods like doGet() or doPost() within your JSP page. You can obtain the data for the FORM input elements via the request implicit object within a scriptlet or expression as. Is there a way to reference the “this” variable within a JSP page? Yes, … Read more

Yes. Preemptive termination of request processing on an error condition is a good way to maximize the throughput of a high-volume JSP engine. The trick (assuming Java is your scripting language) is to use the return statement when you want to terminate further processing. In JavaServer Pages (JSP), once the processing of a request has … Read more

  You can declare methods for use within your JSP page as declarations. The methods can then be invoked within any other methods you declare, or within JSP scriptlets and expressions. Do note that you do not have direct access to any of the JSP implicit objects like request, response, session and so forth from … Read more

You first set “Errorpage” attribute of PAGE directory to the name of the error page (ie Errorpage=”error.jsp”)in your jsp page .Then in the error jsp page set “isErrorpage=TRUE”. When an error occur in your jsp page it will automatically call the error page. In Advanced Java, specifically in JSP (JavaServer Pages), you can control the … Read more