Core Java · interview question
In Java, what is the relationship between an interface and a class that implements it?
Multiple choiceEasychapter-5-curatedpremiumcore-javaupcasting-and-dynamic-dispatch
Answer and explanation
Correct answer
D. The class must define all methods declared in the interface.
Why
A class that implements an interface must define all methods declared in the interface unless the class is abstract. This is because the interface defines a contract that the implementing class agrees to fulfill.
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