# Python OOP (Django)

> Classes, inheritance, polymorphism, magic methods, dataclasses, property decorators

- 20 interview questions
- Junior
- [Interview Questions: Django](https://sharpskill.dev/en/technologies/django/interview-questions.md)

## 1. What is a class in Python?

**Answer**

A class is a blueprint for creating objects. It defines attributes (data) and methods (behaviors) that objects created from this class will have. In Python, a class is defined with the class keyword and allows encapsulating data and functionality together, promoting code reuse and organization.

## 2. What is the role of the __init__ method in a Python class?

**Answer**

The __init__ method is the constructor of a Python class. It is automatically called when creating a new instance. Its main role is to initialize the instance attributes with the values passed as parameters. The first parameter is always self, which refers to the instance being created.

## 3. What is the difference between a class attribute and an instance attribute?

**Answer**

A class attribute is defined at the class level and shared by all instances. Modifying this attribute affects all existing instances. An instance attribute is defined in __init__ with self and is unique to each instance. Each object has its own copy of the instance attribute.

## 17 more questions available

- What is the purpose of the self parameter in Python class methods?
- How to implement simple inheritance in Python?

Sign up for free: https://sharpskill.dev/en/login

## Other Django interview topics

- [Python Basics](https://sharpskill.dev/en/technologies/django/interview-questions/python-basics.md): 25 questions, Junior
- [Django Fundamentals](https://sharpskill.dev/en/technologies/django/interview-questions/django-fundamentals.md): 20 questions, Junior
- [Django Models - Basics](https://sharpskill.dev/en/technologies/django/interview-questions/django-models-basics.md): 22 questions, Junior
- [Django Views](https://sharpskill.dev/en/technologies/django/interview-questions/django-views.md): 20 questions, Junior
- [Django Templates](https://sharpskill.dev/en/technologies/django/interview-questions/django-templates.md): 18 questions, Junior
- [Django Forms](https://sharpskill.dev/en/technologies/django/interview-questions/django-forms.md): 22 questions, Mid-Level
- [Advanced QuerySets](https://sharpskill.dev/en/technologies/django/interview-questions/django-querysets.md): 25 questions, Mid-Level
- [Django Authentication](https://sharpskill.dev/en/technologies/django/interview-questions/django-authentication.md): 22 questions, Mid-Level
- [Django Middleware](https://sharpskill.dev/en/technologies/django/interview-questions/django-middleware.md): 18 questions, Mid-Level
- [Django Admin](https://sharpskill.dev/en/technologies/django/interview-questions/django-admin.md): 20 questions, Mid-Level
- [Django REST Framework](https://sharpskill.dev/en/technologies/django/interview-questions/django-rest-framework.md): 30 questions, Mid-Level
- [Django Signals](https://sharpskill.dev/en/technologies/django/interview-questions/django-signals.md): 18 questions, Mid-Level
- [File Upload](https://sharpskill.dev/en/technologies/django/interview-questions/django-file-upload.md): 20 questions, Mid-Level
- [Django Caching](https://sharpskill.dev/en/technologies/django/interview-questions/django-caching.md): 20 questions, Mid-Level
- [Django Sessions](https://sharpskill.dev/en/technologies/django/interview-questions/django-sessions.md): 18 questions, Mid-Level
- [Django Email](https://sharpskill.dev/en/technologies/django/interview-questions/django-email.md): 18 questions, Mid-Level
- [Django Testing](https://sharpskill.dev/en/technologies/django/interview-questions/django-testing.md): 22 questions, Mid-Level
- [Django Security](https://sharpskill.dev/en/technologies/django/interview-questions/django-security.md): 22 questions, Mid-Level
- [Django Deployment](https://sharpskill.dev/en/technologies/django/interview-questions/django-deployment.md): 24 questions, Mid-Level
- [Advanced Django ORM](https://sharpskill.dev/en/technologies/django/interview-questions/django-orm-advanced.md): 28 questions, Senior
- [Django Performance](https://sharpskill.dev/en/technologies/django/interview-questions/django-performance.md): 24 questions, Senior
- [Django & Celery](https://sharpskill.dev/en/technologies/django/interview-questions/django-celery.md): 22 questions, Senior
- [Django Channels](https://sharpskill.dev/en/technologies/django/interview-questions/django-channels.md): 24 questions, Senior
- [Django & GraphQL](https://sharpskill.dev/en/technologies/django/interview-questions/django-graphql.md): 24 questions, Senior
- [Django & Docker](https://sharpskill.dev/en/technologies/django/interview-questions/django-docker.md): 20 questions, Senior
- [Django in Microservices Ecosystem](https://sharpskill.dev/en/technologies/django/interview-questions/django-microservices.md): 24 questions, Senior
- [Custom Django Commands](https://sharpskill.dev/en/technologies/django/interview-questions/django-custom-commands.md): 18 questions, Senior
- [Django Internationalization](https://sharpskill.dev/en/technologies/django/interview-questions/django-internationalization.md): 20 questions, Senior
- [Django Design Patterns](https://sharpskill.dev/en/technologies/django/interview-questions/django-design-patterns.md): 24 questions, Senior
- [Django Async & ASGI](https://sharpskill.dev/en/technologies/django/interview-questions/django-async-asgi.md): 26 questions, Senior
- [Settings & Production Configuration](https://sharpskill.dev/en/technologies/django/interview-questions/django-settings-configuration.md): 22 questions, Senior
- [Observability & Monitoring](https://sharpskill.dev/en/technologies/django/interview-questions/django-observability.md): 24 questions, Senior

---

Source: SharpSkill (https://sharpskill.dev), tech interview preparation for your real stack.
HTML version of this page: https://sharpskill.dev/en/technologies/django/interview-questions/python-oop