About Question enthuware.ocpjp.ii.v11.2.1312 :

[carlosx]

Is really DataObjectWrapper on the test?

[admin]

DataObjectWrapper is not a standard JDK library class. It is just some random made up class name for the purpose of the question. You can see any such name in the exam including even non-sensical names such as Foo/Bar. You need to focus on the concept that this question is based on.