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SCWCD(310-083)單項選擇題每日一練(2019.01.23)

單項選擇題
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）；
單項選擇題
You are building JSP pages that have a set of menus that are visible based on a user’s security role. Thesemenus are hand-crafted by your web design team； for example， the SalesManager role has a menu in thefile /WEB-INF/html/sales-mgr-menu.html.Which JSP code snippet should be used to make this menuvisible to the user？（）
A.<% if （ request.isUserInRole（"SalesManager"）） { %> <%@ include file=’/WEB-INF/html/sales-mgr-menu.html’ %> <% } %>
B.<jsp：if test=’request.isUserInRole（"SalesManager"）’> <%@ include file=’/WEB-INF/html/sales-mgr-menu.html’ %> </jsp：if>
C.<% if （ request.isUserInRole（"SalesManager"）） { %> . <jsp：include file=’/WEB-INF/html/sales-mgr-menu.html’ /> . <% } %>
D.<jsp：if test=’request.isUserInRole（"SalesManager"）’> <jsp：include file=’/WEB-INF/html/sales-mgr-menu.html’ /> </jsp：if>
單項選擇題
After a merger with another small business， your company has inherited a legacy WAR file but the originalsource files were lost. After reading the documentation of that web application，you discover that the WARfile contains a useful tag library that you want to reuse in your own webapp packaged as a WAR file.What do you need to do to reuse this tag library？（）
A.Simply rename the legacy WAR file as a JAR file and place it in your webapp’s library directory.
B.Unpack the legacy WAR file， move the TLD file to the META-INF directory， repackage the whole thingas a JAR file， and place that JAR file in your webapp’s library directory.
C.Unpack the legacy WAR file， move the TLD file to the META-INF directory， move the class files to thetop-level directory， repackage the whole thing as a JAR file， and place that JAR file in your webapp’slibrary directory.
D.Unpack the legacy WAR file， move the TLD file to the META-INF directory， move the class files to the top-level directory， repackage the WAR， and place that WAR file in your webapp’s WEB-INF directory.
單項選擇題
Given an HttpServletRequest request and an HttpServletResponse response：41.HttpSession session = null；42.// insert code here43.if（session == null） {44.// do something if session does not exist45.} else {46.// do something if session exists47. }To implement the design intent，which statement must be inserted at line 42？（）
A.session = response.getSession（）；
B.session = request.getSession（）；
C.session = request.getSession（true）；
D.session = request.getSession（false）；
E.session = request.getSession（"jsessionid"）；
單項選擇題
You have a new IT manager that has mandated that all JSPs must be refactored to include no scritpletcode. The IT manager has asked you to enforce this.Which deployment descriptor element will satisfy thisconstraint？（）
A.<jsp-property-group>. <url-pattern>*.jsp</url-pattern>. <permit-scripting>false</permit-scripting>. </jsp-property-group>
B.<jsp-config>. <url-pattern>*.jsp</url-pattern><permit-scripting>false</permit-scripting>. </jsp-config>
C.<jsp-config>. <url-pattern>*.jsp</url-pattern>. <scripting-invalid>true</scripting-invalid>. </jsp-config>
D.<jsp-property-group>. <url-pattern>*.jsp</url-pattern>. <scripting-invalid>true</scripting-invalid>. </jsp-property-group>

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