Web Application Development with Django

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Questions and Answers

Which layer of the MVC framework is primarily responsible for data manipulation and retrieval?

Model (correct)

Router

Controller

View

In web applications, which HTTP method is typically used to delete a resource?

DELETE (correct)

PUT

POST

GET

What does a 404 status code signify in web server communication?

Request accepted, processing initiated

Server error occurred

Resource not found (correct)

Unauthorized access

Which framework is categorized as client-side among the following?

Angular Signup and view all the answers

What is the primary purpose of routing in web applications?

To navigate between different views or resources Signup and view all the answers

Which of the following operations does not fall under CRUD functionality?

Navigate Signup and view all the answers

Which server-side framework is developed using Ruby?

Ruby on Rails Signup and view all the answers

What is the role of the Controller in the MVC architecture?

To handle user inputs and update the model accordingly Signup and view all the answers

What HTTP method is typically used to retrieve data from a server?

GET Signup and view all the answers

Which status code indicates that the server can not find the requested resource?

404 Signup and view all the answers

What operation does the HTTP PUT method typically perform?

Update an existing resource Signup and view all the answers

In the context of web server communication, what is the role of a Web API?

It connects the frontend and backend. Signup and view all the answers

What is a common use case for the DELETE HTTP method?

Removing a record from the database. Signup and view all the answers

When designing a RESTful API, which aspect is crucial for ensuring its usability?

Ensuring compliance with standards like response codes. Signup and view all the answers

What is typically returned from the backend to the frontend in a Web API?

JSON blobs Signup and view all the answers

Which HTTP method would you use to send data to the server to create a new resource?

POST Signup and view all the answers

What does the HTTP protocol primarily allow clients to do?

Request and retrieve documents from the web server Signup and view all the answers

Which HTTP method is used to update existing data in the database?

POST Signup and view all the answers

Which of the following operations is NOT part of the CRUD functionality?

Format Signup and view all the answers

What does a status code of 404 represent in an HTTP response?

Requested resource is not found Signup and view all the answers

In the context of web applications, what does routing refer to?

Determining how to respond to a client request Signup and view all the answers

Which command is used to start a new Django project?

django-admin startproject hello_django Signup and view all the answers

What is the primary purpose of using the DELETE method in HTTP?

To remove data from the database Signup and view all the answers

Which of the following commands is used to run a Django development server?

python manage.py runserver Signup and view all the answers

Study Notes

Model-View-Controller (MVC)

MVC is a design pattern used for building web applications.
Divides application into three interconnected components: Model (data), View (user interface), and Controller (business logic).

Object Relational Modelling (ORM)

ORM connects database tables to programming classes.
Facilitates database interaction by representing database tables as classes, columns as properties, and rows as objects.
Enables queries to be executed as methods.
Most modern web frameworks, including Django, utilize ORM principles.

Web Frameworks

Frameworks are often language-specific, intending to simplify development.
Commonly used frameworks include:
- Python: Django
- Java: Spring
- PHP: Laravel
- Ruby: Ruby on Rails
Two primary types of web frameworks:
- Server-Side: Django, Ruby on Rails
- Client-Side: Angular, React, Vue
Focus on server-side frameworks for Web Application Development (WAD).

Setting Up Django

Create a new folder for the project.
Navigate into the folder and ensure that Python 3 is installed.
Install Django using:
- pip3 install django or pip install django.
Start a new Django project named "hello_django":
- Use command django-admin startproject hello_django.
Change into the project folder using cd hello_django.
Run the server with python manage.py runserver.
Access the web application via http://127.0.0.1:8000.

HTTP Protocol

HTTP is fundamental for server communication, allowing retrieval of HTML, images, and documents.
Supports methods for CRUD operations:
- Create: POST
- Read: GET
- Update: POST (edited data)
- Delete: DELETE

Dynamic Websites

Dynamic websites can update content through a Content Management System or a database.
Enable easier updates, such as catalog prices or news announcements.
Can integrate with other systems for functionalities like e-commerce and booking.

API and Backend Connection

APIs serve as the connection layer between the frontend and backend.
Utilize API calls (POST, GET, PUT) to transmit data, usually in formats like JSON.
Service architecture governs application logic and data handling.

Web API Characteristics

Must emphasize usability and compliance with standards (response codes, etc.).
Attention to security and API version management is crucial.
RESTful API design principles should be followed to ensure standardization.

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Description

This quiz covers key concepts of web application development, focusing on the MVC architecture, Object Relational Modelling (ORM), and popular web frameworks like Django. Test your knowledge on how these components interact to create efficient web applications.