9.2 Overriding Methods

• What is the purpose of method overriding in inheritance?

  Specialize inherited behavior
• The @Override annotation in Java ensures that a method in a subclass correctly matches the method signature in the superclass
• What is the purpose of polymorphism enabled by method overriding?

  Treat subclasses as superclasses
• What is the difference between method overriding and method overloading?

  Signature differences
• Inheritance is a fundamental concept in object-oriented programming where a subclass can inherit properties and methods from a superclass
• Method overriding enables polymorphism, allowing subclass objects to be treated as objects of the superclass
• The @Override annotation is optional but recommended to catch errors in method signatures.

  True
• Steps involved in inheritance and method overriding:

  1️⃣ Define a superclass with a method

  2️⃣ Create a subclass that extends the superclass

  3️⃣ Override the inherited method in the subclass

  4️⃣ Use the @Override annotation
• The @Override annotation in Java ensures method signature accuracy.
• Method overriding allows a subclass to redefine methods from its superclass to customize behavior.
• Method overloading requires inheritance.

  False
• What is method overriding in object-oriented programming?

  Subclass redefines superclass method
• In which class does method overriding occur?

  Subclass
• Why is method overriding important in object-oriented programming?

  Allows specialization of behavior
• In the given example, which method is overridden in the Dog class?

  makeSound()
• Method overloading occurs within the same class when methods share the same name but have different parameter lists.


  True
• In the example, which class demonstrates method overloading?

  Calculator
• The method signature in method overriding is the same as the superclass method.
• The `@Override` annotation in the `Dog` class indicates method overriding.


  True
• A `Dog` subclass can override the `makeSound()` method inherited from the `Animal` superclass.


  True
• Method overriding requires the same method signature as the superclass method.


  True
• Method overloading requires the same method signature as the superclass method.

  False
• A Dog class can override the makeSound() method of the Animal class to produce a "woof" sound.

  True
• Method overloading involves defining multiple methods with the same name but different parameters in the same class.

  True
• Method overriding allows a subclass to specialize the behavior of an inherited method.
• The @Override annotation enables polymorphism in Java.


  True
• In which class does method overloading occur?

  Same class
• Match the inheritance concepts with their descriptions:

  Superclass ↔️ Provides a general template

  Subclass ↔️ Extends and specializes the superclass

  Polymorphism ↔️ Objects treated uniformly
• Method overriding enables polymorphism by allowing objects of the subclass to be treated as objects of the superclass.


  True
• Steps to perform method overriding

  1️⃣ Subclass inherits superclass method

  2️⃣ Subclass provides its own implementation

  3️⃣ Subclass uses @Override annotation (optional)
• The @Override annotation ensures that the method in the subclass has the same name, return type, and parameters
• What is one primary purpose of the @Override annotation in Java?

  Ensures correct method signature
• What is the key difference between method overriding and method overloading in terms of method signatures?

  Overriding uses same signature
• What happens if the @Override annotation is used incorrectly?

  Compile-time error
• In method overloading, the method signature must have different parameters.
• Method overriding enables polymorphism, allowing objects of the subclass to be treated as objects of the superclass.
• Method overriding is different from method overloading, which involves defining multiple methods with the same name but different parameters
• Method overloading enables polymorphism.

  False
• The @Override annotation helps catch errors if the method signatures in the subclass and superclass do not match.

  True
• Method overriding is a form of polymorphism