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）？（）

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.

单项选择题Given： 10.public void service（ServletRequest request， 11.ServletResponse response） { 12.ServletInputStream sis = 13.  insert code here 14.} Which retrieves the binary input stream on line 13？（）

A.request.getWriter（）；
B.request.getReader（）；
C.request.getInputStream（）；
D.request.getResourceAsStream（）；

单项选择题You need to retrieve the username cookie from an HTTP request. If this cookie does NOT exist， then the cvariable will be null. Which code snippet must be used to retrieve this cookie object？（）

A.
B.
C.
D.

多项选择题You are creating a servlet that generates stock market graphs. You want to provide the web browser withprecise information about the amount of data being sent in the response stream.  Which twoHttpServletResponse methods will you use to provide this information？（）

A.response.setLength（numberOfBytes）；
B.response.setContentLength（numberOfBytes）；
C.response.setHeader（"Length"， numberOfBytes）；
D.response.setIntHeader（"Length"， numberOfBytes）；
E.response.setHeader（"Content-Length"， numberOfBytes）；
F.response.setIntHeader（"Content-Length"， numberOfBytes）；