Tag: technology

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Multiple choice technology programming languages

Given the definition of MyServlet: public class MyServlet extends HttpServlet { public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(); session.setAttribute("myAttribute","myAttributeValue"); session.invalidate(); response.getWriter().println("value=" + session.getAttribute("myAttribute")); } } What is the result when a request is sent to MyServlet?

  1. An IllegalStateException is thrown at runtime.

  2. An InvalidSessionException is thrown at runtime.

  3. The string "value=null" appears in the response stream.

  4. The string "value=myAttributeValue" appears in the response stream.
Reveal answer Fill a bubble to check yourself
A Correct answer
Full explanation
Multiple choice technology programming languages

Which three are true about the HttpServletRequestWrapper class?

  1. The HttpServletRequestWrapper is an example of the Decorator pattern.

  2. The HttpServletRequestWrapper can be used to extend the functionality of a servlet request.

  3. A subclass of HttpServletRequestWrapper CANNOT modify the behavior of the getReader method.

  4. An HttpServletRequestWrapper may be used only by a class implementing the javax.servlet.Filter interface.

  5. An HttpServletRequestWrapper CANNOT be used on the request passed to the RequestDispatcher.include

  6. An HttpServletRequestWrapper may modify the header of a request within an object implementing the
Reveal answer Fill a bubble to check yourself
A,B,F Correct answer
Multiple choice technology programming languages

Servlet A receives a request that it forwards to servlet B within another web application in the same web container. Servlet A needs to share data with servlet B and that data must not be visible to other servlets in A's web application. In which object can the data that A shares with B be stored?

  1. HttpSession

  2. ServletConfig

  3. ServletContext

  4. HttpServletRequest

  5. HttpServletResponse
Reveal answer Fill a bubble to check yourself
D Correct answer
Full explanation