升级版1Z0-858考试指南：Web组件开发专家认证

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1Z0-858 V8.02认证考试是针对Java企业版5的Web组件开发人员的专业资格考试，该考试旨在评估考生对Java技术在企业级Web应用开发中的理解和能力。在这个版本的考试中，重点考察如何利用现代浏览器支持的Web标准（如XHTML和CSS）来构建安全、易用的Web应用，同时关注从简单的JSP页面向JSP文档格式的迁移。题目中提到的一个关键知识点是，为了适应现代浏览器的需求，一个名为`/scripts/screenFunctions.jsp`的JSP文件被转换为JavaScript文件，并通过`<script>`标签包含在多个网页中，用于创建特定屏幕的验证功能。代码示例中： ```html <head> <script src='/scripts/screenFunctions.jsp' language='javascript' type='application/javascript'></script> </head> ``` 问题部分询问的是，哪个JSP代码片段声明了这个JSP文档是一个JavaScript文件？选项： A. `<%@page contentType='application/javascript'%>` B. `<jsp:page contentType='application/javascript'/>` C. `<jsp:document contentType='application/javascript'/>` D. `<jsp:directive.page contentType='application/javascript'>` 正确答案是A。`<%@page contentType='application/javascript'%>`是在JSP页面的XML声明（taglib declaration）部分使用的，它用来指定页面的MIME类型，告诉服务器这是一个JavaScript文件。其他选项中的`<jsp:page>`、`<jsp:document>`和`<jsp:directive.page>`都是JSP指令或元素，用来处理JSP页面的生命周期，而不是用来声明文件类型。因此，A选项是正确的选择，表明`screenFunctions.jsp`被声明为JavaScript文件。

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104

Answer:

D,E

You are creating a JSP page to display a collection of data. This data can be displayed in several

different ways so the architect on your project decided to create a ge

neric servle

t that generates a

comma

delimited string so that various pages can render the data i

n different ways. This servlet

takes on

request parameter: objectID. Assume that this servlet

is mapped to the URL pattern:

/WEB

INF/data.

In the JSP you are creating, yo

u need to split this string into its elements separated by commas and

generate an

HTML <ul> list from the data.

Which JSTL code snippet will accomplish this goal?

<c:import varReader='dataString' url='/WEB

INF/data'

<c:param name='objectID' value='$

{currentOID}' /

</c:import>

<ul>

<c:forTokens items'${dataString.split(",")}' var='item'

</c:forTokens>

</ul>

B. <c:import varReader='dataString' url='/WEB

INF/data'

<c:param name='objectID' value='${currentOID}' /

</c:import>

<ul>

<c:forTokens items'${dataString}' delims=',' var='item'

</c:forTokens>

</ul>

C. <c:import var='dataString' url='/WEB

INF/data'

<c:param name='objectID' value='${currentOID}' /

</c:import>

<ul>

<c:forTokens items'${dataString.split("

,")}' var='item'

</c:forTokens>

</ul>

D. <c:import var='dataString' url='/WEB

INF/data'

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104

D. declare a security-

role

-ref for vip in the deployment descriptor

Answer:

Give

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 <httpmethod>

tags a

nd <auth

constraint> tags are:

<http

method>GET</http

method>

<http

method>PU

T</http

method>

<auth

constraint>Admin</auth

constraint>

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

r.)

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

What is true about Java EE authentication mechanisms?

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 authenticatio

n type of BASIC, the container

automatically requests a user name and password whenever a user starts a new session.

C. If

you want your web application to support the widest possible a

rray of browsers, and you want

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 login.

Answer:

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.)

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 allow

s 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, yo

u m

ust use predefined variable

names for

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