You may define implementations for abstract methods to act as default implementations.
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Q18: When used correctly,polymorphism will never require changes
Q19: The major drawback to polymorphically designed programs
Q20: Polymorphism involves:
A) the same message sent to
Q21: An abstract class cannot have instance data
Q22: Assigning a derived class reference to a
Q24: Consider the abstract class below:
Public abstract class
Q25: Operator is returns true if two matching
Q26: The keyword sealed is applied to methods
Q27: Classes and methods are declared sealed for
Q28: An abstract base class can be used
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