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Multiple Choice

Which of the following is a requirement for method overriding?

Method overriding is a feature in object-oriented programming that allows a subclass to provide a specific implementation of a method that is already defined in its superclass. The requirement for method overriding is that the parameter lists must be identical, which means the method in the subclass must have the same name, the same return type, and the same number and type of parameters as the method in the superclass. This ensures that when the method is called on an object of the subclass, the correct method is executed, allowing the subclass to provide its own behavior while maintaining a consistent interface. This clear alignment in method signatures is fundamental to maintaining polymorphism, where a call to an overridden method resolves to the most specific implementation based on the object being referenced at runtime. Therefore, having identical parameter lists ensures that the method can replace the method in the superclass seamlessly. The other options do not satisfy the requirements for method overriding — method names must be the same, access levels should generally be equal or less restrictive, and return types must be compatible (or identical) rather than completely different.

Method overriding is a feature in object-oriented programming that allows a subclass to provide a specific implementation of a method that is already defined in its superclass. The requirement for method overriding is that the parameter lists must be identical, which means the method in the subclass must have the same name, the same return type, and the same number and type of parameters as the method in the superclass. This ensures that when the method is called on an object of the subclass, the correct method is executed, allowing the subclass to provide its own behavior while maintaining a consistent interface.

This clear alignment in method signatures is fundamental to maintaining polymorphism, where a call to an overridden method resolves to the most specific implementation based on the object being referenced at runtime. Therefore, having identical parameter lists ensures that the method can replace the method in the superclass seamlessly.

The other options do not satisfy the requirements for method overriding — method names must be the same, access levels should generally be equal or less restrictive, and return types must be compatible (or identical) rather than completely different.