單項選擇題

You have a use case in your web application that adds several session-scoped attributes. At the end of theuse case, one of these objects, the manager attribute, is removed and then it needs to decide which of theother session-scoped attributes to remove.
How can this goal be accomplished?()

A.The object of the manager attribute should implement the HttpSessionBindingListener and it should call the removeAttribute method on the appropriate session attributes.
B.The object of the manager attribute should implement the HttpSessionListener and it should call the removeAttribute method on the appropriate session attributes.
C.The object of the manager attribute should implement the HttpSessionBindingListener and it should call the deleteAttribute method on the appropriate session attributes.
D.The object of the manager attribute should implement the HttpSessionListener and it should call the deleteAttribute method on the appropriate session attributes.


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You are designing an n-tier Java EE application. You have already decided that some of your JSPs willneed to get data from a Customer entity bean. You are trying to decide whether to use a Customer stubobject or a Transfer Object.
Which two statements are true?()

A.The stub will increase network traffic.
B.The Transfer Object will decrease data staleness.
C.The stub will increase the logic necessary in the JSPs.
D.In both cases, the JSPs can use EL expressions to get data.
E.Only the Transfer Object will need to use a Business Delegate.

5.多項選擇題In an n-tier application, which two invocations are typically remote, not local?()

A.JSP to Transfer Object
B.Service Locator to JNDI
C.Controller to request object
D.Transfer Object to Entity Bean
E.Controller to Business Delegate

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