What is the purpose of an interface in Java? To provide a concrete implementation of methods. To define a contract for classes to implement. To hide data within a class. To create objects directly.

An interface in Java serves as a blueprint for classes, defining a contract that specifies what methods a class must implement without providing the actual implementation. This allows different classes to be treated uniformly, fostering polymorphism and enabling easier code management and collaboration across different components in a program. One of the big advantages of using interfaces is the ability to achieve multiple inheritance in a way that doesn't compromise the integrity of the classes involved. While a class can only inherit from one superclass, it can implement multiple interfaces, allowing it to inherit behavior from several sources. This promotes flexibility and reusability in designing your code!