Your question is Designing ETL Pipelines From Scratch. 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).
Describe your process for designing an ETL (Extract, Transform, Load) pipeline from scratch.
Explain how you would clarify requirements, select ingestion and storage technologies, model data, implement transformations, and orchestrate dependencies. Cover incremental loading, idempotency, schema evolution, data quality, testing, observability, failure recovery, security, and backfilling. Provide a practical design using named technologies and representative code or SQL.