Within the web application deployment descriptor， which defines a valid JNDI environment entry？（）

单项选择题Whichelementofthewebapplicationdeploymentdescriptordefinestheservletclassassociatedwithaservletinstance？（）

A.<class><br/>
B.<webapp><br/>
C.<servlet><br/>
D.<codebase><br/>
E.<servlet-class>

单项选择题Given： 11.public class MyServlet extends HttpServlet { 12.public void service（HttpServletRequest request， 13.HttpServletResponse response） 14.throws ServletException， IOException { 15.  insert code here 16.} 17.} and this element in the web application’s deployment descriptor： <error-page> <error-code>302< error-code> <location> html error.html< location> < error-page> Which，inserted at line 15，causes the container to redirect control to the error.html resource？（）

A.response.setError（302）；
B.response.sendError（302）；
C.response.setStatus（302）；
D.response.sendRedirect（302）；
E.response.sendErrorRedirect（302）；

多项选择题You want to create a valid directory structure for your Java EE web application， and your application usestag files and a JAR file. Which three must be located directly in your WEB-INF directory（NOT in asubdirectory of WEB-INF）？（）

A.The JAR file
B.A directory called lib
C.A directory called tags
D.A directory called TLDs
E.A directory called classes
F.A directory called META-INF

单项选择题You have built a web application with tight security. Several directories of your webapp are used for internal purposes and you have overridden the default servlet to send an HTTP 403 status code for any request thatmaps to one of these directories. During testing， the Quality Assurance director decided that they did NOTlike seeing the bare response page generated by Firefox and Internet Explorer. The director recommendedthat the webapp should return a more user-friendly web page that has the same look-and-feel as the webapp plus links to the webapp’s search engine. You have created this JSP page in the  WEB-INF jsps error403.jsp file. You do NOT want to alter the complex logic of the default servlet. How can you declarethat the web container must send this JSP page whenever a 403 status is generated？（）

A.
B.
C.
D.

单项选择题Click the Exhibit button. As a maintenance feature， you have created this servlet to allow you to upload and remove files on yourweb server. Unfortunately， while testing this servlet， you try to upload a file using an HTTP request and onthis servlet， the web container returns a 404 status. What is wrong with this servlet？（）

A.HTTP does NOT support file upload operations.
B.The servlet constructor must NOT have any parameters.
C.The servlet needs a service method to dispatch the requests to the helper methods.
D.The doPut and doDelete methods do NOT map to the proper HTTP methods.