| | Which of the following implicit objects is not available to a JSP page by default? A. application B. session C. exception D. config public class TestServlet extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse res) { private HttpSession session = req.getSession(); private ServletContext ctx = getServletContext(); } } Which of the variables used in the above servlet reference objects that are thread safe? A. req B. res C. session D. ctx |

