1Z1-899 試験問題を無料オンラインアクセス

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 attributeRemoved method and log the attribute name using the getName method on the event object.
• B.Create an SessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getAttributeName method on the event object.
• C.Create an HttpSessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getName method on the event object.
• D.Create an SessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getAttributeName method on the event object.

Given an HttpServletRequest request:
22. String id = request.getParameter("jsessionid");
23. // insert code here
24. String name = (String) session.getAttribute("name")
Which three can be placed at line 23 to retrieve an existing HttpSession object? (Choose three)

• A.HttpSession session = request.getSession(id);
• B.HttpSession session = request.getSession("jsessionid");
• C.HttpSession session = request.getSession(true);
• D.HttpSession session = request.getSession(false);
• E.HttpSession session = request.getSession();

Given:

Which three EL expressions, inserted at line 16, are valid and evaluate to "d"? (Choose three)

• A.${map.c}
• B.${map.[map.b]}
• C.${map.[c]}
• D.${map.["c"]}
• E.${map. (map.b)}
• F.${map.map.b}

Which of the following are attributes of the annotation javax.servlet.annotation.WebFilter?
(i) Name
(ii) servletNames
(iii) urlPatterns
(iv) dispatcherTypes
(v) supportAsync

• A.(iii), (iv) and (v)
• B.(ii), (iii), (iv) and (v)
• C.(ii), (iii) and (iv)
• D.(iii) and (iv)
• E.(iii) only

Which is a valid value for the enum EmptyRoleSemantic in Javax.servlet.annotation.ServletSecurity?

• A.PERMIT
• B.DENYALL
• C.EXCLUDE
• D.ALLOWALL
• E.ADMIT