Django interview questions | Freshers & Experienced

Django follows model-template-view (MTV) architectural pattern.

Difference Between MVT & MVC

MVT: The full form of MVT is Model-View-Template.MVT has a similar approach to that of MVC. Unlike MVC, the MVT itself handles the controllers.

MVC: The full form of MVC is Model-View-Controller. The purpose of MVC is improving code scalability, reducing coupling between code blocks and decoupling.MVC helps the developers to change the visual part of the app and the business logic in a separate way.

Django has a "signal dispatcher" that helps support applications that are decoupled to get informed whenever actions take place elsewhere in a framework. In short, signals allow some senders to inform the set of receivers the action that has occurred. They’re especially beneficial when many parts of code may be involved in the same issues. Django renders a set of inbuilt signals that allows user code to get informed by Django itself of specific actions.

Mixins are in-built class-based views of Django render numerous functionalities but even then some of them can be needed to use separately. For example, a user wants to write a view such that it will provide a template to initiate an HTTP response, but the TemplateView can not be used, then the user will need to provide a template on POST only whereas GET would be doing something completely different. For this cause, Django also renders plenty of mixins that give added discrete functionality.

Class-based views in Django offers a different way to execute views like Python objects as a substitute for functions. It is known that views are callable, and it receives a request while returning a response. It permits you to structure the views and repeat the code by utilizing mixins and inheritance.

Hence, class-based views permit you to answer various HTTP request procedures with various class instance processes sans conditionally bifurcating code within a single or a targeted view function. However, Class-based views do not substitute function-based views although there are points of advantages and differences between function-based and Class-based views.

Django offers a suitable way to produce active HTML pages by the usage of its template methodology. A template comprises static fragments of the aspired HTML output along with few special syntaxes detailed with the instruction regarding the insertion of dynamic contents. Django templates utilize its possessed syntax to assign tags, variables, and expressions, etc. The templates are provided with contexts that are utilized to acquire merit at web pages. Thus, a Django template constitutes variables that in succeeding time can be restored by values when the template has been evaluated with tags that control the template’s logic.