Which is a benefit&#...

单项选择题Which is a benefit of precompiling a JSP page？（）

A.It avoids initialization on the first request.
B.It provides the ability to debug runtime errors in the application.
C.It provides better performance on the first request for the JSP page.
D.It avoids execution of the _jspService method on the first request.

点击查看答案

您可能感兴趣的试卷

你可能感兴趣的试题

1.单项选择题 The JSP developer wants a comment to be visible in the final output to the browser.
Which comment styleneeds to be used in a JSP page？（）

A.
B.<% // this is a comment %>
C.<%-- this is a comment --%>
D.<% /** this is a comment **/ %>

点击查看答案

2.多项选择题Which two are valid and equivalent？（）

A.<%! int i； %>
B.<%= int i； %>
C.<jsp：expr>int i；</jsp：expr>
D.<jsp：scriptlet>int i；</jsp：scriptlet>
E.<jsp：declaration>int i；</jsp：declaration>

点击查看答案

3.多项选择题In which three directories， relative to a web application’s root， may a tag library descriptor file reside whendeployed directly into a web application？（）

A./WEB-INF
B./META-INF
C./WEB-INF/tlds
D./META-INF/tlds
E./WEB-INF/resources
F./META-INF/resources

点击查看答案

4.多项选择题Given that a scoped attribute cart exists only in a user’s session， which two，taken independently，ensurethe scoped attribute cart no longer exists？（）

A.${cart = null}
B.<c：remove var="cart" />
C.<c：remove var="${cart}" />
D.<c：remove var="cart" scope="session" />
E.<c：remove scope="session">cart</c：remove>

点击查看答案

5.多项选择题 Given in a single JSP page：
<%@ taglib prefix=’java’ uri=’myTags’ %>
<%@ taglib prefix=’JAVA’ uri=’moreTags’ %>
Which two are true？（）

A.The prefix ’java’ is reserved.
B.The URI ’myTags’ must be properly mapped to a TLD file by the web container.
C.A translation error occurs because the prefix is considered identical by the web container.
D.For the tag usage ， the tag1 must be unique in the union of tag names in ’myTags’ and’moreTags’.

点击查看答案

6.单项选择题Which interface must a session attribute implement if it needs to be notified when a web container persistsa session？（）

A.javax.servlet.http.HttpSessionListener
B.javax.servlet.http.HttpSessionBindingListener
C.javax.servlet.http.HttpSessionAttributeListener
D.javax.servlet.http.HttpSessionActivationListener

点击查看答案

7.单项选择题 A web application uses the HttpSession mechanism to determine if a user is "logged in." When a usersupplies a valid user name and password， an HttpSession is created for that user. The user has access tothe application for only 15 minutes after logging in. The code must determine how long the user has beenlogged in， and if this time is greater than 15 minutes， must destroy the HttpSession.
Which method in HttpSession is used to accomplish this？（）

A.Getcreationtime
B.Invalidateafter
C.Getlastaccessedtime
D.Getmaxinactiveinterval

点击查看答案

8.单项选择题 Given an HttpServletRequest request and an HttpServletResponse response：
41.HttpSession session = null；
42.// insert code here
43.if（session == null） {
44.// do something if session does not exist
45.} 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"）；

点击查看答案

9.多项选择题Which two statements are true about using the isUserInRole method to implement security in a Java EEapplication？（）

A.It can be invoked only from the doGet or doPost methods.
B.It can be used independently of the getRemoteUser method.
C.Can return "true" even when its argument is NOT defined as a valid role name in the deployment descriptor.
D.Using the isUserInRole method overrides any declarative authentication related to the method in which it is invoked.

点击查看答案

10.多项选择题Which two are required elements for the element of a web applicationdeployment descriptor？（）

A.<realm-name>
B.<url-pattern>
C.<description>
D.<web-resource-name>
E.<transport-guarantee>

点击查看答案