310-083 Real Exam Prep DEMO

Question 15: }
What is the result when a request is sent to MyServlet?
A. An IllegalStateException is thrown at runtime.
B. An InvalidSessionException is thrown at runtime.
C. The string "value=null" appears in the response stream.
D. The string "value=myAttributeValue" appears in the response stream.
Correct Answer: A
19. You need to store a Java long primitive attribute, called customerOID, into the session scope. Which
two code snippets allow you to insert this value into the session? (Choose two.)
A. long customerOID = 47L;
session.setAttribute("customerOID", new Long(customerOID));
B. long customerOID = 47L;
session.setLongAttribute("customerOID", new Long(customerOID));
C. long customerOID = 47L;
session.setAttribute("customerOID", customerOID);
D. long customerOID = 47L;
session.setNumericAttribute("customerOID", new Long(customerOID));
E. long customerOID = 47L;
session.setLongAttribute("customerOID", customerOID);
F. long customerOID = 47L;
session.setNumericAttribute("customerOID", customerOID);
Correct Answer: AC
20. A developer for the company web site has been told that users may turn off cookie support in their
browsers. What must the developer do to ensure that these customers can still use the web application?
A. The developer must ensure that every URL is properly encoded using the appropriate URL rewriting
APIs.
B. The developer must provide an alternate mechanism for managing sessions and abandon the
HttpSession mechanism entirely.
C. The developer can ignore this issue. Web containers are required to support automatic URL rewriting
when cookies are not supported.
D. The developer must add the string id=<sessionid> to the end of every URL to ensure that the
conversation with the browser can continue.
Correct Answer: A
21. Your web application requires the adding and deleting of many session attributes during a complex
use case. A bug report has come in that indicates that an important session attribute is being deleted too
soon and a NullPointerException is being thrown several interactions after the fact. You have decided to
create a session event listener that will log when attributes are being deleted so you can track down when
the attribute is erroneously being deleted.
Which listener class will accomplish this debugging goal?
A. Create an HttpSessionAttributeListener class and implement the attributeDeleted method and log the
attribute name using the getName method on the event object.
B. Create an HttpSessionAttributeListener class and implement the attributeRemoved method and log the
attribute name using the getName method on the event object.
C. Create an SessionAttributeListener class and implement the attributeRemoved method and log the
attribute name using the getAttributeName method on the event object.
D. Create an SessionAttributeListener class and implement the attributeDeleted method and log the
attribute name using the getAttributeName method on the event object.
Correct Answer: B