Data CleaningVery Hard
How do you make an ETL pipeline idempotent?
Seen at: Stripe · Meta · Airbnb
Your daily pipeline sometimes runs twice (retry, manual re-run). When it does, revenue numbers double-count. How do you fix?
Draft your answer
Saved to this browser only. Try it before you peek at the model answer.
Reveals the model answer and the self-score rubric.