5.1 RESTful APIs

• Learn how to design RESTful APIs for communication between services.
• Explore routing, resource modeling, and status codes.
• Frameworks like Django Rest Framework (DRF) or Express.js are popular for building APIs.

5.2 Asynchronous Programming

• Explore asynchronous programming to handle non-blocking requests.
• Use FastAPI (Python) or Express with async/await for handling I/O-bound operations.

5.3 WebSockets

• Learn about WebSockets for real-time communication (e.g., chat apps).
• Explore tools like Action Cable (Rails) or Socket.io (Express.js).

5.4 API Rate Limiting

• Implement rate limiting to prevent abuse of APIs.
• Use third-party libraries or built-in support in frameworks like Django or Express.