Your question is File Upload Validation and Tracking. 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).
Design a website where a user uploads a file/folder (e.g. identity documents), it is validated by a third-party service taking 2-3 seconds, stored in the system, and the user gets back a tracking link.
Asked in the HLD round stage. Focus on metadata in DB vs bytes in S3, handling the delay and UX, and API shape. Reported follow-ups: How will you handle the validation delay and give a good user experience? What do the APIs look like?