6.1 Courses:

• Django: Django for Beginners (Book by William S. Vincent)
• Express.js: The Complete Node.js Developer Course (Udemy)
• Spring Boot: Spring Framework 5 (Udemy)
• Ruby on Rails: The Odin Project (Open-source curriculum)

6.2 Documentation:

• Django: Django Official Documentation
• Express.js: Express.js Official Docs
• Spring Boot: Spring Boot Documentation
• Flask: Flask Docs
• Rails: Ruby on Rails Guides

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7. 💡 Tips for Mastery

• Start Small: Build basic CRUD apps and scale up.
• Read the Docs: Documentation is your best friend.
• Practice: The more projects you build, the better.
• Contribute: Consider contributing to open-source projects built on your chosen framework.

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8. 🌍 Where Web Frameworks Are Used

• Django: Used by platforms like Instagram, Pinterest, and NASA.
• Express.js: Used by companies like Uber and IBM for API services.
• Spring Boot: Popular in banking systems and enterprise-level applications.
• Flask: Used by LinkedIn and Pinterest for backend services.
• Rails: Shopify, GitHub, and Basecamp were built using Rails.