Sun二つの認証を出す：Sun Certified Java Programmer
(SCJP)とSun Certified Java Developer(SCJD)です。SCJPはJavaプログラム設計の概念と能力を測定して、内容はJava文法とJDKの内容を重視します；SCJDはいっそうJava のアプリケーション開発能力を重視します。試験者はつのプログラムの設計案を完成してからこの法案に関する問題を答えします。これは主にJavaプログラマーに向く認証です。それにこの認証は業界でSunに授権される唯一のJava認証です。試験内容はプログラミング概念とapplet開発技巧に関連します.
Sun Certified Web Component Developer for J2EE 5の310-083 問題集皆と分かち合います
3. You have built a collection of custom tags for your web application. The TLD file is located in the file:
/WEB-INF/myTags.xml. You refer to these tags in your JSPs using the symbolic name: myTags. Which
deployment descriptor element must you use to make this link between the symbolic name and the TLD
file name?
A. <taglib>
<name>myTags</name>
<location>/WEB-INF/myTags.xml</location>
</taglib>
B. <tags>
<name>myTags</name>
<location>/WEB-INF/myTags.xml</location>
</tags>
C. <tags>
<tags-uri>myTags</taglib-uri>
<tags-location>/WEB-INF/myTags.xml</tags-location>
</tags>
D. <taglib>
<taglib-uri>myTags</taglib-uri>
<taglib-location>/WEB-INF/myTags.xml</taglib-location>
</taglib>
Answer: D
4. Which implicit object is used in a JSP page to retrieve values associated with <context-param> entries
in the deployment descriptor?
A. config
B. request
C. session
D. application
Answer: D
5. You have created a JSP that includes instance variables and a great deal of scriptlet code.
Unfortunately, after extensive load testing, you have discovered several race conditions in your JSP
scriptlet code. To fix these problems would require significant recoding, but you are already behind
schedule. Which JSP code snippet can you use to resolve these concurrency problems?
A. <%@ page isThreadSafe='false' %>
B. <%@ implements SingleThreadModel %>
C. <%! implements SingleThreadModel %>
D. <%@ page useSingleThreadModel='true' %>
E. <%@ page implements='SingleThreadModel' %>
Answer: A
8. Given the JSP code:
<% request.setAttribute("foo", "bar"); %>
and the Classic tag handler code:
5. public int doStartTag() throws JspException {
6. // insert code here
7. // return int
8. }
Assume there are no other "foo" attributes in the web application.
Which invocation on the pageContext object, inserted at line 6, assigns "bar" to the variable x?
A. String x = (String) pageContext.getAttribute("foo");
B. String x = (String) pageContext.getRequestScope("foo");
C. It is NOT possible to access the pageContext object from within doStartTag.
D. String x = (String)
pageContext.getRequest().getAttribute("foo");
E. String x = (String) pageContext.getAttribute("foo",
PageContext.ANY_SCOPE);
Answer: D
9. Which two statements about tag files are true? (Choose two.)
A. Classic tag handlers and tag files CANNOT reside in the same tag library.
B. A file named foo.tag, located in /WEB-INF/tags/bar, is recognized as a tag file by the container.
C. A file named foo.tag, bundled in a JAR file but NOT defined in a TLD, triggers a container translation
error.
D. A file named foo.tag, located in a web application's root directory, is recognized as a tag file by the
container.
E. If files foo1.tag and foo2.tag both reside in /WEB-INF/tags/bar, the container will consider them part of
the same tag library.
Answer: BE
Sun Certified Web Component Developer for J2EE 5の310-083 問題集皆と分かち合います
3. You have built a collection of custom tags for your web application. The TLD file is located in the file:
/WEB-INF/myTags.xml. You refer to these tags in your JSPs using the symbolic name: myTags. Which
deployment descriptor element must you use to make this link between the symbolic name and the TLD
file name?
A. <taglib>
<name>myTags</name>
<location>/WEB-INF/myTags.xml</location>
</taglib>
B. <tags>
<name>myTags</name>
<location>/WEB-INF/myTags.xml</location>
</tags>
C. <tags>
<tags-uri>myTags</taglib-uri>
<tags-location>/WEB-INF/myTags.xml</tags-location>
</tags>
D. <taglib>
<taglib-uri>myTags</taglib-uri>
<taglib-location>/WEB-INF/myTags.xml</taglib-location>
</taglib>
Answer: D
4. Which implicit object is used in a JSP page to retrieve values associated with <context-param> entries
in the deployment descriptor?
A. config
B. request
C. session
D. application
Answer: D
5. You have created a JSP that includes instance variables and a great deal of scriptlet code.
Unfortunately, after extensive load testing, you have discovered several race conditions in your JSP
scriptlet code. To fix these problems would require significant recoding, but you are already behind
schedule. Which JSP code snippet can you use to resolve these concurrency problems?
A. <%@ page isThreadSafe='false' %>
B. <%@ implements SingleThreadModel %>
C. <%! implements SingleThreadModel %>
D. <%@ page useSingleThreadModel='true' %>
E. <%@ page implements='SingleThreadModel' %>
Answer: A
8. Given the JSP code:
<% request.setAttribute("foo", "bar"); %>
and the Classic tag handler code:
5. public int doStartTag() throws JspException {
6. // insert code here
7. // return int
8. }
Assume there are no other "foo" attributes in the web application.
Which invocation on the pageContext object, inserted at line 6, assigns "bar" to the variable x?
A. String x = (String) pageContext.getAttribute("foo");
B. String x = (String) pageContext.getRequestScope("foo");
C. It is NOT possible to access the pageContext object from within doStartTag.
D. String x = (String)
pageContext.getRequest().getAttribute("foo");
E. String x = (String) pageContext.getAttribute("foo",
PageContext.ANY_SCOPE);
Answer: D
9. Which two statements about tag files are true? (Choose two.)
A. Classic tag handlers and tag files CANNOT reside in the same tag library.
B. A file named foo.tag, located in /WEB-INF/tags/bar, is recognized as a tag file by the container.
C. A file named foo.tag, bundled in a JAR file but NOT defined in a TLD, triggers a container translation
error.
D. A file named foo.tag, located in a web application's root directory, is recognized as a tag file by the
container.
E. If files foo1.tag and foo2.tag both reside in /WEB-INF/tags/bar, the container will consider them part of
the same tag library.
Answer: BE