Which of the following is an example of polymorphism in Java?

• A. A class implementing multiple interfaces
• B. Overriding methods in derived classes
• C. Having methods with the same name but different parameters
• D. All of the above

Answer: (D)

Polymorphism in Java refers to the ability of a single function or method to operate in different ways based on the context or data types provided. The answer indicating that all of the choices exemplify polymorphism is indeed accurate.

In the context of object-oriented programming, polymorphism can manifest in various forms, including:

1. Overriding methods in derived classes enables a subclass to provide a specific implementation of a method that is already defined in its superclass. When an instance of the subclass is created and the method is called, the overridden version in the subclass is executed. This allows for dynamic method resolution, which is a key aspect of polymorphism.

2. Having methods with the same name but different parameters, often referred to as method overloading, is another way to achieve polymorphism. In this case, the method to be invoked is determined at compile time based on the method signature (the method name and parameter types). This allows developers to use the same method name for different functionalities, enhancing code readability and maintainability.

3. A class implementing multiple interfaces allows that class to be treated as any of the interface types it implements. This is a form of polymorphism as it allows for different behaviors depending on the type being referenced. An object