JSP,Servlet and Design patterns

Which method in the HttpServlet class services the HTTP POST request? (Select one)

DoPost(ServletRequest, ServletResponse)

DoPOST(ServletRequest, ServletResponse)

DoPost(HttpServletRequest, HttpServletResponse)

ServicePost(HttpServletRequest, HttpServletResponse)

Which design pattern allows you to decouple the business logic, data representation, and data presentation? (Select one)

Value Object

Model-View-Controller

Bimodal Data Access

Business Delegate

What will be the output of the following code? (Select one) <% x="3;"> <% int="" x="5;"> <%! int="" x="7;"> x = <%=x%>, <%=this.x%>

Compilation error

X = 3, 5

X = 3, 7

X = 5, 3

Your web application, named simpletax, depends on a third-party JAR file named taxpackage.jar. Where would you keep this file?

Simpletax/WEB-INF/lib

Simpletax/WEB-INF/thirdparty

Simpletax/WEB-INF/jars

Simpletax/WEB-INF

Which of the following lines would initialize the out variable for sending a Microsoft Word file to the browser?

OutputStream out = response.getOuputStream();

ServletOutputStream out = response.getServletOutputStream();

PrintWriter out = response.getServletOutput();

PrintWriter out = response.getOuputStream();

Which element is used to specify useful information about an initialization parameter of a servlet in the deployment descriptor?

Consider the following doPost() method of a servlet: public void doPost (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("Inside doPost"); PrintWriter out = response.getWriter(); out.println("Hello, "); String name = getNameFromDBSomeHow(); if(name == null) { response.sendError(HttpServletResponse.SC_NOT_FOUND, "Unable to get name."); } out.println(name); } Assuming that getNameFromDBSomeHow() returns null, which of the following statements regarding this code are correct?

It will throw an IllegalStateException while serving a request.

It will throw an InvalidStateException while serving a request.

It will throw a ServletException while serving a request.

It will not throw an exception.

Which of the following is a valid taglib directive?

<% taglib uri="/stats" prefix="stats" %>

<%! Taglib uri="/stats" prefix="stats" %>

<%@ taglib name="/stats" prefix="stats" %>

<%@ taglib uri="/stats" prefix="stats" %>

<%@ taglib name="/stats" value="stats" %>

Which of the options locate the bean equivalent to the following action? (Select three)

Request.getAttribute("address");

Request.getParameter("address");

GetServletContext().getRequestAttribute("address");

PageContext.getAttribute("address",PageContext.REQUEST_SCOPE);

PageContext.getRequest().getAttribute("address");

PageContext.getRequestAttribute("address");

PageContext.getRequestParameter("address");

What are the benefits of using the Data Access Object pattern? (Select two)

The type of the actual data source can be specified at deployment time.

The data clients are independent of the data source vendor API.

It increases the performance of data-accessing routines.

It allows the clients to access the data source through EJBs.

It allows resource locking in an efficient way.

Which of the following methods would you use to retrieve header values from a request? (Select two)

GetHeader() of ServletRequest

GetHeaders() of HttpServletRequest

GetHeader() of HttpServletRequest

GetHeaders() of ServletRequest

GetHeaders() of HttpServletRequest

Which of the following are the benefits of using the Value Object design pattern? (Select two)

It improves the response time for data access.

It improves the efficiency of object operations.

It reduces the network traffic.

It reduces the coupling between the data access module and the database.

Which of the following correctly declares that the current page is an error page and also enables it to take part in a session?

<%@ page pageType="errorPage" session="required" %>

<%@ page isErrorPage="true" session="mandatory" %>

<%@ page isErrorPage="true" session="true" %>

None of the above.

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