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Interview Questions Answer

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Interview Questions

Interview Questions And Answer


1. What is Django?

Answer:

Django is a high-level Python web framework that facilitates rapid development and clean, pragmatic design. It follows the MVC (Model-View-Controller) architectural pattern, termed as MTV (Model-Template-View) in Django, emphasizing reusability and DRY (Don't Repeat Yourself) principles.

2. Explain the components of Django architecture.

Answer:

Django architecture consists of:

  • Models: Defines the database schema and manages data.
  • Views: Handles user-facing logic and renders templates.
  • Templates: Provides HTML presentation layer with Django's template language.
  • URL Dispatcher: Routes incoming requests to appropriate views.

3. What are Django ORM and its advantages?

Answer:

Django ORM (Object-Relational Mapping) allows developers to interact with databases using Python objects. Advantages include abstraction from SQL syntax, automatic schema generation, and portability across different database systems.

4. How does Django handle URL routing?

Answer:

Django uses a URL dispatcher to match incoming browser requests with Python functions (views). URLs are defined in urls.py using regular expressions or path syntax, allowing for clean and flexible routing.

5. Explain Django's template language.

Answer:

Django's template language is used to render dynamic HTML templates. It supports template inheritance, filters, tags, and variables to dynamically generate content based on context provided by views.

6. What is Django's admin interface, and how do you customize it?

Answer:

Django provides an automatically generated admin interface based on models defined in admin.py. It allows CRUD (Create, Read, Update, Delete) operations on database records. Customization involves creating ModelAdmin classes to modify display, filters, and actions.

7. How does Django handle security concerns?

Answer:

Django includes built-in protections against common security threats such as SQL injection, cross-site scripting (XSS), and cross-site request forgery (CSRF). It implements secure password hashing, HTTPS enforcement, and user authentication mechanisms.

8. What are Django signals, and how are they used?

Answer:

Django signals allow decoupled applications to get notified when certain actions occur elsewhere in the application. They are used to perform tasks asynchronously in response to events, such as post-save operations on models.

9. Explain Django middleware and give an example.

Answer:

Django middleware is a way to process requests globally before they reach the view layer or after a view has processed them. An example is AuthenticationMiddleware, which handles user authentication and sets the user attribute on the request.

10. How does Django support scalability and deployment?

Answer:

Django supports scalability by allowing deployment to various hosting environments and supporting horizontal scaling. It integrates well with popular deployment platforms like AWS, Heroku, and Docker, facilitating efficient resource management and load balancing.

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