Decision Point Data Engineer Interview Questions
The questions to prepare for a Decision Point Data Engineer interview. Questions from real interview reports rank first. Updated weekly.
Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.
Decision PointUse CTEs and DENSE_RANK to find employees earning the second highest distinct active salary.
Decision PointExplain OLTP vs OLAP designs, including schema shape, workload patterns, and when each is appropriate in a data platform.
Decision PointFind the second highest salary in each department without using aggregate functions.
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Cisco Restaurant + BarDesign a real-time event pipeline that can handle millions of events per second with sub-second latency.
Decision PointCompare batch and streaming data processing, including when each fits best in a pipeline.
Decision PointCompare batch and stream processing across latency, complexity, cost, and data quality in a modern analytics pipeline.
Decision PointMerge two sorted arrays into one sorted array using a two-pointer linear scan.
Decision PointTests your ability to design out-of-core or distributed solutions for big data constraints.
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