Method overriding behavior in Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is method overriding in Python?

Method overriding happens when a child class provides its own version of a method that already exists in its parent class. This new method replaces the parent's method when called on the child class object.

intermediate

How does Python decide which method to call when a method is overridden?

Python uses the method of the child class if it exists. If the child class does not have the method, Python looks up the parent class method. This is called dynamic method dispatch.

intermediate

Can a child class call the parent class's overridden method? How?

Yes, the child class can call the parent class's method using the super() function. For example, super().method_name() calls the parent method inside the child method.

beginner

What happens if the child class does not override a method from the parent class?

If the child class does not override the method, the method from the parent class is used when called on the child class object.

beginner

Why is method overriding useful in programming?

It allows child classes to customize or extend the behavior of parent classes without changing the parent code. This helps create flexible and reusable code.

What does method overriding allow a child class to do?

A Provide a new version of a method from the parent class

B Delete a method from the parent class

C Create a method with a different name

D Prevent the parent class from being used

Method overriding lets the child class provide its own version of a method that exists in the parent class.

How can a child class call the original method from its parent class after overriding it?

A It is not possible

B By renaming the method

C By deleting the child method

D Using the super() function

The super() function allows the child class to access the parent class's method even after overriding it.

If a method is not overridden in the child class, which method is called?

A An error occurs

B A random method

C The parent class method

D The child class method

If the child class does not override the method, the parent class's method is used.

What is the term for Python choosing which method to call at runtime?

A Static typing

B Dynamic method dispatch

C Method hiding

D Compile-time binding

Dynamic method dispatch means Python decides at runtime which method to call, especially with overridden methods.

Why is method overriding important in object-oriented programming?

A It allows customizing inherited behavior

B It prevents inheritance

C It deletes parent classes

D It creates new classes automatically

Method overriding lets child classes change or extend the behavior they inherit from parent classes.

Explain method overriding and how Python decides which method to run when a method is overridden.

Think about how child and parent classes interact when they have methods with the same name.

Describe how to call a parent class's method from a child class when the method is overridden.

Remember the special function that helps access parent methods.