● Free · no signup · ~5 min
Try a system design drill
One focused, interview-style prompt. Write a short answer and an AI interviewer grades it in seconds.
The prompt
Design the API for uploading and serving large video files. Specify endpoints and how you handle large/resumable uploads.
Files up to 5 GBResumable uploads required
Your answerFill in each line — schema, bullets, or prose.
Endpoints ◯·Request / response shape ◯·Idempotency / pagination ◯
No diagram needed for a drill — that's what the full interview is for.