Core Java Programming Course- Method Overriding

The video tutorial explains the concept of method overriding in object-oriented programming. It begins by distinguishing between method overloading and overriding, emphasizing that overloading occurs within the same class with different arguments, while overriding involves a superclass and subclass with the same method signature. An example is provided using an Animal class and its subclasses Dog and Cat, demonstrating how the subclass method overrides the superclass method. The tutorial concludes by reinforcing the key differences and the importance of understanding method overriding.

What is the key difference between method overloading and method overriding?

• Overloading allows different return types for the same method name.

• Overriding involves methods with the same name and arguments in different classes.

• Overloading requires methods to have different names.

• Overriding allows methods to have different access levels.

In the example provided, what does the 'Who am I?' method in the Dog class print?

• I am a subclass.

• I am a cat.

• I am a dog.

• I am an animal.

What is the relationship between the Dog and Animal classes in the example?

• Dog is a superclass of Animal.

• Dog is a subclass of Animal.

• Dog and Animal are unrelated classes.

• Dog and Animal are interfaces.

When an object of the Dog class is created, which method implementation is executed?

• The method from the Dog class.

• The method from the superclass.

• The method from the Animal class.

• The method from the Cat class.

What happens if the Dog class does not have the 'Who am I?' method?

• The method from the Animal class will be executed.

• The method from the Cat class will be executed.

• The program will throw an error.

• The method from the Dog class will be executed.

Which statement best describes method overriding?

• It allows a subclass to provide a specific implementation of a method already defined in its superclass.

• It allows a class to have multiple methods with the same name but different parameters.

• It is a way to achieve polymorphism in a class.

• It is used to increase the readability of the program.

Which concept allows a subclass to modify the behavior of a method defined in its superclass?

• Method overloading

• Method overriding

• Encapsulation

• Abstraction