Parent and child classes in Python - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a parent class in Python?

A parent class is a class that provides attributes and methods which can be inherited by other classes called child classes. It is also known as a base or superclass.

beginner

What does a child class do in Python?

A child class inherits attributes and methods from a parent class. It can also add new features or change existing ones.

beginner

How do you define a child class that inherits from a parent class in Python?

You write the child class name followed by parentheses containing the parent class name. For example: <br><code>class Child(Parent):</code>

intermediate

What happens if a child class has a method with the same name as the parent class?

The child class method overrides the parent class method. When called on a child object, the child's version runs.

beginner

Why use parent and child classes in programming?

They help reuse code, organize related features, and make programs easier to understand and maintain by grouping shared behavior in the parent class.

How do you indicate that a class Child inherits from a class Parent in Python?

A class Child extends Parent:

B class Child(Parent):

C class Child -> Parent:

D class Child inherits Parent:

In Python, inheritance is shown by putting the parent class name in parentheses after the child class name.

If a child class defines a method with the same name as the parent class, which method is used when called on a child object?

A Child class method

B Parent class method

C Both methods run

D An error occurs

The child class method overrides the parent class method, so the child's version runs.

What is the main benefit of using parent and child classes?

A To reuse code and organize related features

B To make code longer

C To avoid using functions

D To make programs run slower

Parent and child classes help reuse code and organize related features, making programs easier to maintain.

Which term is NOT related to parent and child classes?

A Inheritance

B Encapsulation

C Polymorphism

D Compilation

Compilation is unrelated to the concept of parent and child classes, which are about inheritance and object-oriented programming.

What keyword is used to call the parent class constructor inside a child class in Python?

A base()

B parent()

C super()

D this()

The super() function is used to call the parent class constructor or methods from the child class.

Explain how a child class inherits from a parent class and how method overriding works.

Think about how you can reuse and change behavior from the parent.

Describe why using parent and child classes can make your code easier to manage.

Consider how grouping shared things helps in real life.