Your question is Image Upload API Review. 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).
Review a technical design document for uploading images and serving them in all resolutions with minimal latency, and suggest changes.
Asked in the Round 4 (TDD review) stage. This is an architecture design discussion with follow-ups on each suggestion, including which cache and eviction policy to use, and how browser caching handles different images with the same name.