310-083 試験問題を無料オンラインアクセス

Given:
1 . <% int[] nums = {42,420,4200};
2 . request.setAttribute("foo", nums); %>
3 . ${5 + 3 lt 6}
4 . ${requestScope['foo'][0] ne 10 div 0}
5 . ${10 div 0}
What is the result?

• A.Compilation or translation fails.
• B.false true
• C.false true Infinity
• D.true true Infinity
• E.false true 0
• F.true true
• G.An exception is thrown.

Click the Exhibit button. Given the web application deployment descriptor elements:
1 1. <filter>
1 2. <filter-name>ParamAdder</filter-name>
1 3. <filter-class>com.example.ParamAdder</filter-class>
1 4. </filter>
...
3 1. <filter-mapping>
3 2. <filter-name>ParamAdder</filter-name>
3 3. <servlet-name>Destination</servlet-name>
3 4. </filter-mapping>
...
5 5. <servlet-mapping>
5 6. <servlet-name>Destination</servlet-name>
5 7. <url-pattern>/dest/Destination</url-pattern>
5 8. </servlet-mapping>
What is the result of a client request of the Source servlet with no query string?

• A.The output "filterAdded = addedByFilter" is written to the response stream.
• B.The output "filterAdded = null" is written to the response stream.
• C.An exception is thrown at runtime within the service method of the Source servlet.
• D.An exception is thrown at runtime within the service method of the Destination servlet.

Given a JSP page:
1 1. <n:recurse>
1 2. <n:recurse>
1 3. <n:recurse>
1 4. <n:recurse />
1 5. </n:recurse>
1 6. </n:recurse>
1 7. </n:recurse>
The tag handler for n:recurse extends SimpleTagSupport.
Assuming an n:recurse tag can either contain an empty body or another n:recurse tag, which strategy allows the tag handler for n:recurse to output the nesting depth of the deepest n:recurse tag?

• A.Create a private non-static attribute in the tag handler class called count of type int initialized to 0. Increment count in the doTag method. If the tag has a body, invoke the fragment for that body. Otherwise, output the value of count.
• B.Start a counter at 1. Call getChildTags(). If it returns null, output the value of the counter.
  Otherwise, increment counter and continue from where getChildTags() is called. Skip processing of the body.
• C.If the tag has a body, invoke the fragment for that body.Otherwise, start a counter at 1.
  Call getParent(). If it returns null, output the value of the counter Otherwise, increment the counter and continue from where getParent() is called.
• D.It is impossible to determine the deepest nesting depth because it is impossible for tag handlers that extend SimpleTagSupport to communicate with their parent and child tags.

Users of your web application have requested that they should be able to set the duration of their sessions. So for example, one user might want a webapp to stay connected for an hour rather than the webapp's default of fifteen minutes; another user might want to stay connected for a whole day.
Furthermore, you have a special login servlet that performs user authentication and retrieves the User object from the database. You want to augment this code to set up the user's specified session duration.
Which code snippet in the login servlet will accomplish this goal?

• A.User user = // retrieve the User object from the database
  session.setMaxInactiveInterval(user.getSessionDuration());
• B.User user = // retrieve the User object from the database
  session.setInactiveInterval(user.getSessionDuration());
• C.User user = // retrieve the User object from the database
  session.setMaxDuration(user.getSessionDuration());
• D.User user = // retrieve the User object from the database
  session.setMaxDurationInterval(user.getSessionDuration());
• E.User user = // retrieve the User object from the database
  session.setDurationInterval(user.getSessionDuration());
• F.User user = // retrieve the User object from the database
  session.setDuration(user.getSessionDuration());

Which two are true regarding a web application class loader? (Choose two.)

• A.A web application running in a J2EE product may override classes in the javax.* namespace.
• B.Resources in the WAR class directory or in any of the JAR files within the library directory CANNOT be accessed using the J2SE semantics of getResource.
• C.Resources in the WAR class directory or in any of the JAR files within the library directory may be accessed using the J2SE semantics of getResource.
• D.A web application class loader may NOT override any classes in the java.* and javax.* namespaces.
• E.A web application may override the web container's implementation classes.