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Interview questions · hard
Solve the Dutch National Flag problem in one pass. How would you handle it?
What's the role of surrogate keys in dimensional modeling?
Explain how Spark groups transformations into stages. What causes a stage boundary?
How do you set up CI/CD for a PySpark ETL workflow?
How is resource allocation handled in YARN?
Design a data model to track orders, payments, and shipping — handle changes in customer address
Design a data pipeline to ingest and process clickstream data in near real-time
How does HDFS handle fault tolerance?
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