通过SCWCD考试310-083的关键：JSP与JavaScript集成

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"SCWCD考试239题" SCWCD（Sun Certified Web Component Developer for J2EE 5）是一项针对Java EE 5平台中Web组件开发的专业认证考试，其考试代码为310-083。这个认证旨在帮助开发者通过测试来验证他们对于创建J2EE 5 Web应用程序的专业技能，包括使用JSP（JavaServer Pages）、Servlet、JSF（JavaServer Faces）等技术。在描述中提到的一个实际问题涉及到将简单的JSP页面转换为JSP文档格式，以利用现代浏览器对Web标准（如XHTML和CSS）的支持。在这个过程中，有一个名为`/scripts/screenFunctions.jsp`的JSP页面，它生成一个JavaScript文件，用于创建屏幕特定的验证函数。这个JavaScript文件通过以下HTML标签在多个web表单中被引入： ```html <head> <script src='/scripts/screenFunctions.jsp' language='javascript' type='application/javascript'></script> ... </head> ``` 问题在于，如何正确地声明这个JSP文档是一个JavaScript文件。根据JSP的语法，我们需要使用`<jsp:directive.page>`元素来指定页面的MIME类型。因此，正确的选项是： D. `<jsp:directive.page contentType='application/javascript'/>` 这个指令告诉服务器，这个JSP文件应该被处理并返回为`application/javascript`类型的MIME内容，确保浏览器能够正确解析和执行生成的JavaScript代码。其他选项，如A、B和C，要么使用了错误的标签，要么是不完整的表述。选项E认为不需要任何声明，这是不正确的，因为每个JSP文件都需要明确其内容类型，特别是当它被用作外部脚本资源时。 SCWCD考试通常涵盖以下几个关键领域： 1. JSP基本概念：包括JSP语法、指令、脚本元素以及EL（Expression Language）。 2. Servlet：理解Servlet生命周期、部署描述符以及如何处理HTTP请求和响应。 3. JSTL（JavaServer Pages Standard Tag Library）：学习使用JSTL标签库来简化页面逻辑。 4. JSF（JavaServer Faces）：了解JSF组件、事件处理和转换验证。 5. 请求处理和会话管理：掌握HTTP请求和响应处理，以及如何在Web应用程序中管理用户会话。 6. 错误处理和安全：学习如何处理HTTP错误和异常，以及实现Web应用的安全性措施。 7. 部署和容器：理解Web应用程序的部署过程，以及如何与不同的应用服务器（如Tomcat或Glassfish）交互。备考SCWCD考试时，考生需要对这些主题有深入的理解，并通过实践项目和模拟试题来巩固知识。通过考试后，开发者将证明自己具备设计和实现高效、可维护的J2EE 5 Web应用程序的能力。

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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