Backend Technologies · Python
Django — Free Learning Resources
Free, printable resources for Django — practice problems, quick-reference cheatsheet, and an interview prep sheet. No sign-up required.
Django — Practice Worksheet
Structured exercises and problems to build hands-on Django skills. Work through key concepts step by step.
Django — Cheatsheet
One-page quick-reference for Django — key syntax, commands, patterns, and best practices at a glance.
Django — Interview Sheet
Top Django interview questions with concise answers. Get ready for any technical round with this focused prep sheet.
About Django
Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design. Its 'batteries-included' philosophy ships everything — ORM, admin panel, authentication, URL routing, and templating — out of the box. Django powers Instagram, Pinterest, and Disqus, proving it scales from side projects to billions of users.
DjangoCheat Sheet — What's Covered
- ✓MVT architecture — Models, Views, and Templates explained
- ✓Django ORM — querysets, lookups, aggregations, and migrations
- ✓Class-based views vs. function-based views compared
- ✓Django REST Framework serializers, viewsets, and routers
- ✓Authentication, permissions, and the built-in admin interface
Frequently Asked Questions — Django
What is Django's MVT architecture?
MVT stands for Model-View-Template. Models define the data schema. Views contain business logic and return responses. Templates render HTML. Django's URL dispatcher routes requests to the correct view — it fills the Controller role automatically.
How do Django migrations work?
Run python manage.py makemigrations to generate a migration file describing model changes, then python manage.py migrate to apply it. Django tracks applied migrations in the django_migrations table, enabling version-controlled schema changes.
What is the N+1 query problem and how does Django solve it?
N+1 happens when accessing a related object triggers a separate query per row. Django solves it with select_related() for FK/OneToOne (SQL JOIN) and prefetch_related() for M2M or reverse FK relations (a separate optimized query).
How does Django's authentication system work?
Django ships a complete auth system: User model, login/logout views, session handling, and PBKDF2 password hashing. Use @login_required to protect views, LoginRequiredMixin for class-based views, and the permission framework for fine-grained access control.
What is Django REST Framework and when should you use it?
DRF is a toolkit for building APIs on top of Django. It provides serializers (model↔JSON), viewsets (CRUD in one class), routers (automatic URL generation), and authentication backends. Use it whenever building an API consumed by a frontend or mobile app.
Who Is This For?
Python developers building web applications who value convention over configuration and want a full-featured framework with minimal setup.