Your question is APIs in Real-World Platforms. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
About API's and how it is used in real world platforms
Explain what an API is and how a client uses a REST API in practice. Cover the request and response lifecycle, HTTP methods and status codes, authentication, validation, pagination, versioning, and failure handling. Use one concrete API example and explain the key design and operational trade-offs. Keep the answer focused on HTTP-based APIs and general client-server platforms.