What happens if you try to override a final method in a subclass?

• A. It will compile without issues.
• B. It will result in a compilation error.
• C. It will execute but may not work properly.
• D. It depends on the compiler settings.

Answer: (B)

When a method is declared as final in a superclass, it cannot be overridden by any subclass. This restriction is enforced by the Java programming language as a part of its design to maintain the integrity of the superclass's behavior. The intent behind declaring a method as final is often to provide a concrete implementation that cannot be altered, ensuring consistent functionality across the hierarchy of classes.

When you attempt to override a final method in a subclass, the Java compiler will generate a compilation error. This is because the rules of method overriding stipulate that the signatures of the methods must match, and overriding a final method violates the constraints set by the parent class.

Thus, receiving a compilation error helps developers identify and uphold the integrity of the class's design, preventing unintentional modifications that might impact system behavior. This principle is fundamental when designing robust and maintainable software in Java.