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SUN Sun Certified Web Component Developer for J2EE 5 Sample Questions:
1. A custom tag is defined to take three attributes. Which two correctly invoke the tag within a
JSP page? (Choose two.)
A) <prefix:myTag a="foo" b="bar" c="baz" />
B) <prefix:myTag attributes={"foo","bar","baz"} />
C) <prefix:myTag>
< jsp:attribute a:foo b:bar c:baz />
< /prefix:myTag>
D) <prefix:myTag jsp:attribute a="foo" b="bar" c="baz" />
E) <prefix:myTag>
< jsp:attribute name="a">foo</jsp:attribute>
< jsp:attribute name="b">bar</jsp:attribute>
< jsp:attribute name="c">baz</jsp:attribute>
< /prefix:myTag>
F) <prefix:myTag>
< jsp:attribute a="foo" b="bar" c="baz"/>
< /prefix:myTag>
G) <prefix:myTag>
< jsp:attribute ${"foo", "bar", "baz"} />
< /prefix:myTag>
2. Given the security constraint in a DD:
1 01. <security-constraint>
1 02. <web-resource-collection>
1 03. <web-resource-name>Foo</web-resource-name>
1 04. <url-pattern>/Bar/Baz/*</url-pattern>
1 05. <http-method>POST</http-method>
1 06. </web-resource-collection>
1 07. <auth-constraint>
1 08. <role-name>DEVELOPER</role-name>
1 09. </auth-constraint>
1 10. </security-constraint>
And given that "MANAGER" is a valid role-name, which four are true for this security constraint? (Choose four.)
A) MANAGER can do a TRACE on any resource in the /Bar/Baz directory.
B) DEVELOPER can do a GET on resources in the /Bar/Baz directory.
C) DEVELOPER can do only a POST on resources in the /Bar/Baz directory.
D) MANAGER can do a GET on resources in the /Bar/Baz directory.
E) DEVELOPER can do a TRACE on any resource in the /Bar/Baz directory.
F) MANAGER can do a POST on any resource in the /Bar/Baz directory.
3. You want to create a filter for your web application and your filter will implement javax.servlet.Filter.
Which two statements are true? (Choose two.)
A) The method that your filter invokes on the object it received that implements javax.servlet.FilterChain can invoke either another filter or a servlet.
B) Your filter class must implement an init method and a destroy method.
C) Your filter class must also implement javax.servlet.FilterChain.
D) When your filter chains to the next filter, it should pass the same arguments it received in its doFilter method.
E) Your filter class must implement a doFilter method that takes, among other things, an
HTTPServletRequest object and an HTTPServletResponse object.
4. Given in a single JSP page:
< %@ taglib prefix='java' uri='myTags' %>
< %@ taglib prefix='JAVA' uri='moreTags' %>
Which two are true? (Choose two.)
A) A translation error occurs because the prefix is considered identical by the web container.
B) For the tag usage <java:tag1/>, the tag1 must be unique in the union of tag names in
'myTags' and 'moreTags'.
C) The prefix 'java' is reserved.
D) The URI 'myTags' must be properly mapped to a TLD file by the web container.
5. Assume that a news tag library contains the tags lookup and item:
lookup Retrieves the latest news headlines and executes the tag body once for each headline. Exposes a NESTED page-scoped attribute called headline of type com.example.Headline containing details for that headline.
item Outputs the HTML for a single news headline. Accepts an attribute info of type com.example.Headline containing details for the headline to be rendered.Which snippet of JSP code returns the latest news headlines in an HTML table, one per row?
A) <news:lookup />
< table>
< tr>
< td><news:item info="${headline}" /></td>
< /tr>
< /table>
B) <table>
< news:lookup>
< tr>
< td><news:item info="${headline}" /></td>
< /tr>
< /news:lookup>
< /table>
C) <table>
< tr>
< td>
< news:lookup />
< news:item info="${headline}" />
< /td>
< /tr>
< /table>
D) <table>
< tr>
< news:lookup>
< td><news:item info="${headline}" /></td>
< /news:lookup>
< /tr>
< /table>
Solutions:
Question # 1 Answer: A,E | Question # 2 Answer: A,B,D,E | Question # 3 Answer: A,B | Question # 4 Answer: C,D | Question # 5 Answer: B |