Do you have a Django interview coming up? The team at GoApt has curated a list of 10 Django interview questions and answers for your preparation.
Django is a free, open-source web framework written in the Python programming language and used by millions of programmers every year. Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design. Its popularity is due to its friendliness for both beginners and advanced programmers. Django makes it easier to build effective web apps quickly and with less code.
Django is robust enough to be used by the biggest websites in the world. Django was designed to handle two challenges: the intensive deadlines of a newsroom and the stringent requirements of experienced Web developers.
1. What is Django?
Django is a web framework written in python for developing web applications. It is free and open-source. Django makes it easier to build web applications quickly and with less code.
2. What are some features of the Django framework?
Some key features of the Django framework are:
- A free, rich API.
- Automatic database table creation.
- Admin interface.
- Form Handling.
- A dynamic admin interface generator.
- A syndication feed framework.
- A powerful cache framework for dynamic websites.
- A powerful built-in template system.
- Easy database migrations.
- Security features.
- Helpful add-ons.
- Object-relational mapping.
- Testing framework.
- The availability of sessions, user management, and role-based permission.
- Elegant URL design.
3. What are the major components of Django’s architecture?
The Django architecture consists of:
- Models: It describes your database schema and data structure.
- Views: It controls what a user sees. The view retrieves data from appropriate models and executes any calculation made to the data and passes it to the template.
- Templates: The template determines how the user sees the web app. It describes how the data received from the views should be changed or formatted for rendering on the webpage.
- Controller: It is the heart of the system. The controller handles requests and responses, setting up database connections, loading add-ons, and URL parsing.
4. Why should Django be used for web development?
Django should be used for web development for the following reasons:
- It allows dividing the code into logical groups (or modules) to enable flexibility and modification.
- To ease website administration, it provides an auto-generated web admin module.
- Django provides pre-packaged APIs for common user tasks.
- It enables the developer to define what the URL should be for a given function.
- Separates the business logic from the HTML aspect.
- Fully written in Python programming language.
- It offers a template system to define the HTML template for your web page.
5. Can you explain the working philosophy of Django?
The Django framework comprises the following files:
- Models.py: This file defines your data model by extending your single line of code into full database tables. It also adds a pre-built administration section to manage content.
- Urls.py: It uses regular expressions to capture URL patterns for processing.
- Views.py: The actual processing happens in view which is defined in views.py.
When a visitor lands on the Django page:
- Django checks the various URL pattern you have created and uses the information to retrieve the view.
- The view processes the request, querying your database if necessary.
- The view passes the requested information to your template.
- The template renders the data in a layout you have created and displays the page.
6. What are the inheritance properties in Django?
There are three inheritance properties in Django:
- Abstract base classes: This style is used when you want the parent class to hold information that you don’t want to type out for each child model.
- Multi-table Inheritance: This style is used if you are sub-classing an existing model and require each model to have its own database table.
- Proxy models: This style is used if you want to modify the Python level behavior of the model, without changing the model’s fields.
Find the Official Documentation of Django Here
7. How can you set up a Database in Django?
To set up a database in Django, you can use the command edit my site/ setting.py. It is a python file containing module-level Django settings.
Django uses the SQLite database by default. It is easy for Django users because it doesn’t require any other type of installation. In the case of other databases, you have the following keys in the DATABASE ‘default’ item to match your database connection settings.
Engines: You can change the database by using any of the following: ‘django.db.backends.sqlite3’; ‘django.db.backeneds.mysql’; ‘django.db.backends.postgresql_psycopg2’; ‘django.db.backends.oracle’
Name: The name of your database. If you are using SQLite as your database, the database will be a file on your computer. The name should be an absolute path, including the file name.
You can specify settings like password, host, user, etc. in your database if you are not choosing SQLite as your database.
8. How do you set up static files in Django?
The following steps are to be performed to set up static files in Django:
- Set STATIC_ROOT in settings.py
- Run manage.py collect static
- Set up a Static Files entry on the PythonAnywhere web tab.
9. What is the use of the session framework in Django?
The session framework facilitates the storing and retrieval of arbitrary data on a per-site visitor basis. It stores data on the server-side and abstracts the receiving and sending of cookies. A session can be implemented through a piece of middleware.
Also Read: Django vs Flask – A Comparative Study
10. What is the use of middleware in Django?
Middleware is used for the following reasons:
- Session management.
- Cross-site request forgery protection.
- Use authentication.
- Content Gzipping.
Are you aware of other common Django interview questions? The best websites for Django tutorials? Or how to prepare for Django certification? We’d love to know in the comments.