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ZS Associates Data Engineer Interview Questions

The questions to prepare for a ZS Associates Data Engineer interview. Questions from real interview reports rank first. Updated daily.

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1
PipelinesStart here. 3 questions · ~30 min
Spark, Python, SQL Big DataHard

Explain your practical experience with Spark, Python, SQL, distributed processing, and big data pipeline development.

ZZS Associates
Design SCD Type 1 and 2Medium

Design and implement SCD Type 1 and Type 2 dimensions with history tracking, idempotent loads, and data quality controls.

slowly changing dimensionsData ModelingBackfillingZZS Associates
Design an End-to-End Data PipelineMedium

Approach for designing an end-to-end data pipeline from ingestion through transformation, storage, and downstream consumption.

data pipelinedesigningestionZZS Associates
2
More topics3 questions · ~30 min
SQL Above Department AverageEasy
Practice

Identify Amazon employees earning above their department average using aggregation, a derived table, and joins.

ZZS Associates
Customer Orders: LEFT vs INNER JOINEasy

Explain how INNER JOIN and LEFT JOIN differ, and when to use each for matched-only versus all-left-row analysis.

JoinsData WranglingGroup ByZZS Associates
Team Role and Project ContributionEasy

Evaluates ownership, collaboration, prioritization, and measurable contribution to team delivery.

achievementaccountabilitycollaborationZZS Associates

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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
Top Customers by Net SalesMedium
Practice
Practice drill

Compute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.

SubqueriesJoinsData WranglingGain DigitalTCSZest AI
Top Daily Rides by VehicleMedium
Practice
Practice drill

Rank the top 3 completed rides per vehicle per day using joins, a CTE, and ROW_NUMBER.

Window FunctionsJoinsData WranglingWaymoCruise
The finish line: interview-readyComplete all 6 questions plus 2 hands-on drills to finish this plan.