DS Technical SkillsProblem Solving

How do you build automated sanity checks into an Airflow DAG to verify that the extraction layer pulled the exact expected number of records?

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Interview question asked to Data Scientists interviewing at Grubhub, Prezi, Databricks and other companies. Original question asked: How do you build automated sanity checks into an Airflow DAG to verify that the extraction layer pulled the exact expected number of records?.