Latest Django Interview Questions

Django interview questions

Python Django interview questions and answers

Django is a free and open-source web framework written in Python and Based on the model-view-template architectural pattern. Django web framework is a set of components that help you to develop websites earlier and easier.

While building a website, you always need a similar set of components: a way to handle user authentication (signing up, signing in, signing out), a management panel for your website.

Fortunately, other people long ago noticed that the same problem is faced by developers while making a website, so they teamed up and created frameworks that give you ready-made components to use and Django is one of them.

Top Django interview questions and answers are given below.

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Django interview questions

Signal are inbuilt utility in Django. They allow to execute some piece of code based on some action or event is occurred in framework something like a new user register, on delete of a record.
Below is the list of some inbuilt signal in Django.

  • pre_save and post_save.
  • pre_delete and post_delete
  • pre_request and post_request
  • pre_request and post_request

Following points are specified by the Django Field Class type: –

  • It specifies the database column type.
  • It also specifies the default HTML widget which is availed while we render the form field.
  • The requirements of the minimal validation which is used in Django admin is also specified by the field class.

Django supports 3 types of inheritance. They are

  • Abstract base classes
  • Multi-table Inheritance
  • Proxy models

Features available in Django web framework are:

  • Admin Interface (CRUD)
  • Templating
  • Form handling
  • Internationalization
  • Session, user management, role-based permissions
  • Object-relational mapping (ORM)
  • Testing Framework
  • Fantastic Documentation

Django follows MVC -MVT architecture. MVT  stand for Model View Template design Pattern which is little bit different from MVC (Model View Controller ) Pattern.

You can use {{ request.path }} and {{ request.get_full_path }} to get current page URI in Django template.

A mixin is a special kind of multiple inheritances in Python. There are two main situations where mixins are used:

  • You want to provide a lot of optional features for a class.
  • You want to use one particular feature in a lot of different classes.

Read More from https://stackoverflow.com/questions/533631/what-is-a-mixin-and-why-are-they-useful

In Django Context is a dictionary with variable names in the form of key and value like {varible1: 101, varible2: 102},when we pass this context to the template render method, {{ varible1 }} would be replaced with 101 and {{ varible2 }} with 102 in your template.

Setting Session in Django

request.session['key'] = 'value'

Unset Session in Django

del request.session['key']

By running below command on Terminal.You can check installed version of Django Framework.

py -m django --version

Iterators are used for traversing an object in Python which implements iterator protocol. It consists of two methods __iter__() and next().
In Django, a good use of iterator is when you are processing results that take up a large amount of available memory (lots of small objects or fewer large objects).
For more clarification please read when to use and when to not use iterator() in the Python Django ORM
https://stackoverflow.com/questions/12681653/when-to-use-or-not-use-iterator-in-the-django-orm

Installing using pip is the recommended way to install Django Framework. Below are the steps to install official release of Django with pip

  • Install pip.
  • Configure virtualenv and virtualenvwrapper
  • Once virtual environment is created and activated, enter the command pip install Django to install Django

Few caching strategies that are available in Django are as follows:

  • File system caching
  • In-memory caching
  • Using Memcached
  • Database caching

Template can create formats like XML,HTML and CSV(which are text-based formats). In general terms template is a simple text file. It is made up of variables that will later be replaced by values after the template is evaluated and has tags which will control template’s logic.