Answer :
The Checker scenario involves the implementation of the Checker interface by the Checker class. The Checker interface is a set of methods that define the behavior of a checker object. The Checker class must implement these methods to provide the desired functionality.
To implement the Checker interface, the Checker class must define the methods specified in the interface. These methods may include methods for checking if a given object meets a certain criteria, methods for performing some action on the object, or methods for comparing two objects. Once the Checker class has implemented the methods of the Checker interface, it can be used to check objects against the criteria defined by the interface. For example, if the Checker interface includes a method for checking if an object is valid, the Checker class can be used to check whether a given object is valid or not. Overall, the Checker scenario is an example of how interfaces can be used to define a set of methods that can be implemented by different classes to provide a consistent behavior. By implementing the Checker interface, the Checker class can be used in a variety of applications to perform checks on different types of objects.
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