For manageability purposes， you have been told to add a "count" instance variable to a critical JSP Document so that a JMX MBean can track how frequent this JSP is being invoked.
Which JSP code snippetmust you use to declare this instance variable in the JSP Document？（）

单项选择题For debugging purposes， you need to record how many times a given JSP is invoked before the user’ssession has been created. The JSP’s destroy method stores this information to a database. Which JSPcode snippet keeps track of this count for the lifetime of the JSP page？（）

A.<%! int count = 0； %><% if （ request.getSession（false） == null ） count++； %>
B.<%@ int count = 0； %>. <% if （ request.getSession（false） == null ） count++； %>
C.<% int count = 0；. if （ request.getSession（false） == null ） count++； %>
D.<%@ int count = 0；. if （ request.getSession（false） == null ） count++； %>
E.<%! int count = 0；. if （ request.getSession（false） == null ） count++； %>

单项选择题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>

多项选择题Whichtwoaretrueregardingawebapplicationclassloader？（）

A.A web application may override the web container’s implementation classes.
B.A web application running in a J2EE product may override classes in the javax.* namespace.
C.A web application class loader may NOT override any classes in the java.* and javax.* namespaces.
D.Resources in the WAR class directory or in any of the JAR files within the library directory may be accessed using the J2SE semantics of getResource.

多项选择题Whichthreearedescribedinthestandardwebapplicationdeploymentdescriptor？（）

A.session configuration
B.MIME type mappings
C.context root for the application
D.servlet instance pool configuration
E.web container default port bindings
F.Servlet Context initialization parameters

单项选择题Withinthewebapplicationdeploymentdescriptor，whichdefinesavalidJNDIenvironmententry？（）

A.
B.
C.
D.