Your question is ETL Transformations You Built. 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).
Explain the transformations you worked on in your ETL pipelines.
Discuss a practical example from your experience, covering source-to-target mapping, cleansing, standardization, joins, aggregations, derived fields, incremental processing, and data quality checks. Explain which technologies you used, how the pipeline was orchestrated, and how you handled failures, duplicates, schema changes, and validation of the target data.