单选题 Given a web application in which the cookie userName is expected to contain the name of the user. Which EL expression evaluates to that user name？（）

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

单选题 A developer is designing a web application that must support multiple interfaces， including： an XML web service for B2B HTML for web-based clients WML for wireless customers. Which designpattern provides a solution for this problem？（）

单选题 You have created a servlet that generates weather maps. The data for these maps is calculated by aremote host. The IP address of this host is usually stable， but occasionally does have to change as thecorporate network grows and changes. This IP address used to be hard coded， but after the fifth change tothe IP address in two years， you have decided that this value should be declared in the deploymentdescriptor so you do NOT have the recompile the web application every time the IP address changes. Which deployment descriptor snippet accomplishes this goal？（）

单选题 A developer is designing a web application that must support multiple interfaces，including： an XML web service for B2B HTML for web-based clients WML for wireless customers. Which designpattern provides a solution for this problem？（）

单选题 Given a portion of a valid Java EE web application’s directory structure：MyApp | |--Directory1 ||--File1.html| |--META-INF|  |--File2.html| |--WEB-INF |--File3.html You want to know whether File1.html， File2.html，and/or File3.html is protected from direct access by yourweb client’s browsers. What statement is true？（）

单选题 You are building a Front Controller using a JSP page and you need to determine if the user’s session hasNOT been created yet and perform some special processing for this case. Which scriptlet code snippet willperform this test？（）

单选题 You need to create a JavaBean object that is used only within the current JSP page. It must NOT beaccessible to any other page including those that this page might import. Which JSP standard action canaccomplish this goal？（）

单选题 Your IT department is building a lightweight Front Controller servlet that invokes an application logic objectwith the interface： public interface ApplicationController {public String invoke（HttpServletRequest request）} The return value of this method indicates a symbolic name of the next view. From this name， the FrontController servlet looks up the JSP URL in a configuration table. This URL might be an absolute path or apath relative to the current request. Next， the Front Controller servlet must send the request to this JSP togenerate the view. Assume that the servlet variable request is assigned the current HttpServletRequestobject and the variable context is assigned the webapp’s ServletContext.  Which code snippet of the FrontController servlet accomplishes this goal？（）