An object can respond to a message only if its class implements a corresponding method. ____________________

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This is the fundamental principle of object-oriented programming. Each object in a program can only respond to messages (also called methods or functions) for which it has been programmed. This means that the object's class must implement the corresponding method for it to respond to a message. If the method is not implemented, the object will not know how to respond and may produce an error.

An Object Can Respond to a Message Only If Its