Question

which is an abstract class? A question from Oracle exam

Thanks

Answer 1

Mouse because the name is italicized.

http://www.ibm.com/developerworks/rational/library/content/RationalEdge/sep04/bell/

Within that url search for specifically for this section:

Abstract classes and operations

The observant reader will notice that
the diagrams in Figures 4 and 5 use
italicized text for the BankAccount
class name and withdrawal operation.
This indicates that the BankAccount
class is an abstract class and the
withdrawal method is an abstract
operation. In other words, the
BankAccount class provides the
abstract operation signature of
withdrawal and the two child classes
of CheckingAccount and SavingsAccount
each implement their own version of
that operation.

However, super classes (parent
classes) do not have to be abstract
classes. It is normal for a standard
class to be a super class.