SCWCD(310-083)单项选择题每日一练(2018.08.24)

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
Given the JSP code：<% request.setAttribute（"foo"， "bar"）； %>and the Classic tag handler code：5. public int doStartTag（） throws JspException {6. // insert code here7. // return int8. }Assume there are no other "foo" attributes in the web application.Which invocation on the pageContextobject，inserted at line 6，assigns "bar" to the variable x？（）
A.String x = （String） pageContext.getAttribute（"foo"）
B.String x = （String） pageContext.getRequestScope（"foo"）
C.It is NOT possible to access the pageContext object from within doStartTag
D.String x = （String） pageContext.getRequest（）.getAttribute（"foo"）
E.String x = （String） pageContext.getAttribute（"foo"， PageContext.ANY_SCOPE）
单项选择题
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？（）
A.Dispatcher view=context.getDispatcher（viewURL）；view.forward Request（request， response）；
B.Dispatcher view=request.getDispatcher（viewURL）；view.forward Request（request， response）；
C.RequestDispatcher view. =context.getRequestDispatcher（viewURL）；view.forward（request，response）；
D.RequestDispatcher view=request.getRequestDispatcher（viewURL）；view.forward（request， response）；
单项选择题
You are building a web application that will be used throughout the European Union； therefore， it has significant internationalization requirements. You have been tasked to create a custom tag that generates amessage using the java.text.MessageFormat class. The tag will take the resourceKey attribute and a variable number of argument attributes with the format， arg. Here is an example use of this tag and itsoutput： generates： The disk "MyDisk"contains 1247 file（s）.Which Simple tag class definition accomplishes this goal of handling a variable number of tag attributes？（）
A.
B.
C.
D.
单项选择题
Given a Filter class definition with this method：21.public void doFilter（ServletRequest request，22.ServletResponse response，23.FilterChain chain）24.throws ServletException， IOException {25.// insert code here26. }Which should you insert at line 25 to properly invoke the next filter in the chain，or the target servlet if thereare no more filters？（）
A.chain.forward（request， response）；
B.chain.doFilter（request， response）；
C.request.forward（request， response）；
D.request.doFilter（request， response）；