Your question is Complex ETL Pipeline Architecture. 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).
You're discussing a pipeline you built from the ground up and want to explain the architecture clearly. The interviewer is looking for how you structure ingestion, transformation, orchestration, and operational controls in a production ETL system.
Walk me through the architecture of the most complex ETL pipeline you have designed from scratch.