转换为JSP Document格式：310-083考试试题解析

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“SCWCD_310-083-02题库.pdf”是一个针对Sun Certified Web Component Developer for J2EE 5认证考试的练习题库，包含239个问题。这个文档旨在帮助考生准备310-083号考试，该考试是Java Web开发领域的一个专业认证。在提供的部分试题内容中，涉及到一个关于如何正确声明JSP页面为JavaScript文件的问题。试题指出，有一个名为"/scripts/screenFunctions.jsp"的JSP页面，它生成了一个JavaScript文件，并被其他网页通过`<script>`标签引用，以实现屏幕特定的验证功能。目前的引用方式如下： ```html 10. <head> 11. <script src='/scripts/screenFunctions.jsp' 12. language='javascript' 13. type='application/javascript'></script> 14. </head> 15.  ``` 题目询问了在JSP文档中，哪个代码片段能正确声明这个JSP页面是一个JavaScript文件。以下是各个选项的分析： A. `<%@page contentType='application/javascript'%>` - 这是正确的选项，`@page`指令用于设置整个JSP页面的内容类型，`contentType`属性指明了页面的MIME类型，即'application/javascript'，这符合现代浏览器处理JavaScript文件的标准。 B. `<jsp:page contentType='application/javascript'/>` - 这个选项是错误的，因为没有`jsp:page`这样的元素，正确的语法是`<%@page%>`。 C. `<jsp:document contentType='application/javascript'/>` - 这同样是一个不正确的选项，因为在JSP中不存在`jsp:document`这个元素，应该使用`@page`指令。 D. `<jsp:directive.page contentType='application/javascript'/>` - 这个选项也是错误的，虽然`jsp:directive.page`是JSP的XML语法，但是它通常用于导入包或者设置页面的属性，而不是声明内容类型。 E. Nodeclaration is needed because the web form XHTML page already declares the MIME type - 这个选项错误，因为即使HTML页面声明了MIME类型，JSP页面本身也需要单独声明其内容类型。因此，正确答案是A. `<%@page contentType='application/javascript'%>`。这个知识点强调了在JSP中如何正确配置页面以确保浏览器将其解析为JavaScript文件，同时展示了`@page`指令的用途，这是Java Web开发中的一个重要概念，对于通过SCWCD考试以及实际开发工作都至关重要。

Exam Name: Sun Certified Web Component Developer for J2EE 5

Exam Type: Sun

Exam Code: 310-083 Total Questions: 239

Page 16 of 102

Answer: A, B, E

Question: 32

Your management has required that all JSPs be created to generate XHTML-compliant content

and to facilitate that decision, you are required to create all JSPs using the JSP Document format.

In the reviewOrder.jspx page, you need to use several core JSTL tags to process the collection of

order items in the customer's shopping cart. Which JSP code snippets must you use in the

reviewOrder.jspx page?

A. <html xmlns:jsp="http://java.sun.com/JSP/Page"

version="2.0">

<jsp:directive.taglib prefix="c"

uri="http://java.sun.com/jsp/jstl/core" />

</html>

B. <html xmlns:jsp="http://java.sun.com/JSP/Page"

version="2.0"

xmlns:c="http://java.sun.com/jsp/jstl/core">

</html>

C. <jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

version="2.0">

<jsp:directive.taglib prefix="c"

uri="http://java.sun.com/jsp/jstl/core" />

</jsp:root>

D. <jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

version="2.0"

xmlns:c="http://java.sun.com/jsp/jstl/core">

</jsp:root>

Answer: D

Question: 33

Which two JSTL URL-related tags perform URL rewriting? (Choose two.)

A. Url

B. Link

C. Param

D. Import

E. Redirect

Answer: A, E

Question: 34

A custom JSP tag must be able to support an arbitrary number of attributes whose names are

unknown when the tag class is designed. Which two are true? (Choose two.)

A. The <body-content> element in the echo tag TLD must have the value JSP.

B. The echo tag handler must define the setAttribute(String key, String value) method.

C. The <dynamic-attributes>true</dynamic-attributes> element must appear in the echo tag

TLD.

D. The class implementing the echo tag handler must implement the

javax.servlet.jsp.tagext.IterationTag interface.

Exam Name: Sun Certified Web Component Developer for J2EE 5

Exam Type: Sun

Exam Code: 310-083 Total Questions: 239

Page 17 of 102

E. The class implementing the echo tag handler must implement the

F. javax.servlet.jsp.tagext.DynamicAttributes interface.

Answer: C, E

Question: 35

A developer has used this code within a servlet:

62. if(request.isUserInRole("vip")) {

63. // VIP-related logic here

64. }

What else must the developer do to ensure that the intended security goal is achieved?

A. Create a user called vip in the security realm

B. Define a group within the security realm and call it vip

C. Define a security-role named vip in the deployment descriptor

D. Declare a security-role-ref for vip in the deployment descriptor

Answer: D

Question: 36

Given:

3. class MyServlet extends HttpServlet {

4. public void doPut(HttpServletRequest req, HttpServletResponse resp) throws

ServletException,

IOException {

5. // servlet code here ...

26. }

27. }

If the DD contains a single security constraint associated with MyServlet and its only <http

method> tags and <auth-constraint> tags are:

<http-method>GET</http-method>

<http-method>PUT</http-method>

<auth-constraint>Admin</auth-constraint>

Which four requests would be allowed by the container? (Choose four.)

A. A user whose role is Admin can perform a PUT.

B. A user whose role is Admin can perform a GET.

C. A user whose role is Admin can perform a POST.

D. A user whose role is Member can perform a PUT.

E. A user whose role is Member can perform a POST.

F. A user whose role is Member can perform a GET.

Answer: A, B, C, E

Question: 37

What is true about Java EE authentication mechanisms?

A. If your deployment descriptor correctly declares an authentication type of CLIENT_CERT,

your users must have a certificate from an official source before they can use your

application.

B. If your deployment descriptor correctly declares an authentication type of BASIC, the

container automatically requests a user name and password whenever a user starts a new

session.

Exam Name: Sun Certified Web Component Developer for J2EE 5

Exam Type: Sun

Exam Code: 310-083 Total Questions: 239

Page 18 of 102

C. If you want your web application to support the widest possible array of browsers, and you

want to perform authentication, the best choice of Java EE authentication mechanisms is

DIGEST.

D. To use Java EE FORM authentication, you must declare two HTML files in your deployment

descriptor, and you must use a predefined action in the HTML file that handles your user's

Answer: D

Question: 38

If you want to use the Java EE platform's built-in type of authentication that uses a custom HTML

page for authentication, which two statements are true? (Choose two.)

A. Your deployment descriptor will need to contain this tag: <auth-method>CUSTOM</auth-

method>.

B. The related custom HTML login page must be named loginPage.html.

C. When you use this type of authentication, SSL is turned on automatically.

D. You must have a tag in your deployment descriptor that allows you to point to both a login

HTML page and an HTML page for handling any login errors.

E. In the HTML related to authentication for this application, you must use predefined variable

names for the variables that store the user and password values.

Answer: D, E

Question: 39

Given this fragment in a servlet:

23. if(req.isUserInRole("Admin")) {

24. // do stuff

25. }

And the following fragment from the related Java EE deployment descriptor:

812. <security-role-ref>

813. <role-name>Admin</role-name>

814. <role-link>Administrator</role-link>

815. </security-role-ref>

900. <security-role>

901. <role-name>Admin</role-name>

902. <role-name>Administrator</role-name>

903. </security-role>

What is the result?

A. Line 24 can never be reached.

B. The deployment descriptor is NOT valid.

C. If line 24 executes, the user's role will be Admin.

D. If line 24 executes, the user's role will be Administrator.

E. If line 24 executes the user's role will NOT be predictable.

Answer: D

Question: 40

Given the security constraint in a DD:

101. <security-constraint>

102. <web-resource-collection>

剩余101页未读，继续阅读

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