Your question is Idempotent Incremental Pipelines. 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).
How would you design an idempotent pipeline with incremental loading?
Asked in the L1 stage. Focus on how you would make repeated runs safe, load only new or changed data, and recover from partial failures without duplicating records or missing updates.