Explain data lineage and how you would implement it

This tests your ability to translate a data governance concept into a practical system design for a distributed environment. A great answer first defines lineage (origin, transformations, movement), then outlines an implementation. Propose using a standard like OpenLineage to emit metadata from services and ETL jobs. This data is sent to a backend like Marquez, which builds a graph of dependencies. This allows for visualization and tracing errors back to their source. The red flag is only defining the term or suggesting manual documentation.