A polymorphic reference uses the type of the reference, not the type of the object, to determine which version of a method to invoke.

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Quizplus · Accepted Answer

In polymorphism, the type of the object determines which version of a method to invoke, not the type of the reference. This allows a reference of a superclass type to refer to an object of a subclass type and invoke overridden methods of the subclass.

A Polymorphic Reference Uses the Type of the Reference, Not