XenonStack Data Engineer Interview Questions
The questions to prepare for a XenonStack Data Engineer interview. Questions from real interview reports rank first. Updated daily.
Evaluates how you design reliable scheduling, dependencies, and execution for ETL workflows.
Assesses your tradeoffs for running data pipelines in serverless environments.
Assesses your understanding of Spark APIs and when to choose PySpark versus native Spark.
Tests your ability to build resilient data pipelines with robust error handling.
Evaluates end-to-end pipeline design skills, tradeoffs, and problem-solving under complexity.
Compare Python lists and tuples, including mutability, performance, and when each should be used.
Explain how UNION and UNION ALL differ when combining result sets, especially around duplicate handling and performance.
Compare BFS and DFS graph traversal, including order, data structures, and when each is preferred.
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Rewrite a slow PostgreSQL loan payment query to reduce scanned rows while preserving the required aggregated results.
Biz2Credit
AmeripriseEEltro Cyberchrome PrivateCalculate a three-day moving average of active-client revenue using aggregation and SQL window functions.
Identify department maximum salaries, rank ties, and count assigned projects using PostgreSQL joins and window functions.
IBM