What is the impact of declaring a method as final?

• A. A final method can be overridden.
• B. A final method cannot be overridden.
• C. A final method can only be called by subclasses.
• D. A final method cannot be overloaded.

Answer: (B)

Declaring a method as final signifies that this method cannot be overridden by any subclasses. This restriction ensures that the behavior of the method remains consistent and unchanged throughout the inheritance hierarchy. When a method is marked as final, it can still be accessed by subclasses, but they cannot provide their own implementation of that method. This is especially useful when you want to maintain a specific functionality or ensure the integrity of the method’s behavior, particularly in class designs where it’s crucial to safeguard against unexpected changes in subclasses.

While other choices might present alternative scenarios related to method behavior, they do not accurately encapsulate the meaning of a final method in Java. For instance, the concept of overloading, which refers to creating multiple methods with the same name but different parameters, remains unaffected by the final designation. Ultimately, the keyword final emphasizes the protection of the method from being altered in subclasses, ensuring its implementation is preserved.