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Django Interview Questions

Django is a free, open-source web framework written in Python programming language. If you are seeking for making a career in Django, you may encounter plenty of Django interview questions and answers during the interview. Preparing for Django interview can be difficult. It can, however, be made easier with these expert-authored Django interview questions and answers.

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Beginner

Django is a free and open source web application framework written in python. Django is named after Django Reinhardt, Jazz guitarist. It adheres to DRY principle and follows MVC architectural pattern.

Django follows MVC pattern (Model-View-Controller), also referred to as MTV (Model-Template-View). 

Model – describes database schema 

Views – Controls what user can view. It retrieves data from the table and passes it to the template which is rendered to Browser eventually.

Template – Determines how the user sees it. 

Controller – controls the entire flow of models and data.

  1.  Admin Interface
  2.  Forms
  3.  Templating
  4.  The session, user management
  5.  Object-relational Mapping (ORM)

Django has inbuilt session management which maintains visitor basis data. Session data is in 

stored in the server and passed to the client on HTTP response-request cookie object.

In settings.py, STATIC_ROOT defines the path of file location.

It is a function that helps request/response object before/after the process. It can be used for session management, user authentication, CSRF.

It is one of the utility, helps in execute codes based on action or event. An event can be triggered before/after table values.

File system, In-memory, Memcache & Database caching

Abstract base class, Multi-table inheritance, Proxy models

When a user requests a page, Django determines whether the request URL pattern is mentioned in URLs.py. Once the regex matches, Django calls the corresponding view. HttpRequest is passed as an argument to that view function and the implementation part is executed further.

Receiver: It specifies the callback function which will be connected to the signal.
Sender: It specifies a particular sender to receive a signal from.

Object Relational Mapping is a tool that let user query and manipulate data from database using an object paradigm.  

It is a list of strings representing the host/domain names that the Django site can serve. It is a security measure to prevent HTTP attacks.

CSRF – Cross Site Request Forgery. Csrf tokens could also be sent to a client by an attacker due to session fixation or other vulnerabilities or guessed via a brute-force attack, rendered on a malicious page that generates thousands of failed requests.

Advanced

Filter and get are used to find matched values from the tables. However, if there is no match found for the criteria, get() throws error, filter display empty result. Filter retrieves more than one result whereas get() is used to retrieve one matched data.

It fetches all related records for data from multiple tables at one go. Further processing, won't hittable again. This helps in improving performance.

If we define a column with attributes primary_key=True, will assign a primary key. By default, the auto-increment column is set with the primary key. 

auto_now – updates current time when an object is created. auto_now_add is updated with current time whenever an object got saved.

Django supports SHA algorithm. It is a one-way encryption method, which means the password cannot be decrypted until the user types the same password data.

Description

Django is a free, open-source web framework written in Python programming language. This framework is based on Model-View-Template (MVT) architectural pattern. Django is a high-level framework that motivates fast and clean development and pragmatic design. Django is popular due to the friendly features it offers to both the beginners and advanced developers. Django makes it easier to build web applications with less code complexity. The framework is robust and can be used for building any kind of websites in the world. 
 
Django is designed to handle the challenges like-

  • the intensive deadlines of a newsroom and
  • the stringent requirements of the experienced web developers

Today, Django is being used to develop the top website categories like Business & Industry, Arts & Entertainment, Shopping Internet & Telecom and so on.
 
If you are seeking for making a career in Django, you may encounter plenty of Django interview questions and answers during the interview. Preparing for Django interview can be difficult. It can, however, be made easier with these expert-authored Django interview questions and answers. 
 
These top interview questions and answers in Django can be beneficial for the freshers and experienced individuals alike. Also, Django interview questions will not only make your concepts clear but also help you in cracking the interview and land your dream job. 
 

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