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Updated weekly · Last refresh Sep 18

AArete Data Engineer Interview Questions

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

11questions
~2htotal time
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1
PipelinesStart here. 5 questions · ~53 min
Handle Late Data in BatchMedium

Approach for handling late-arriving records in a batch ETL pipeline without breaking correctness or forcing full reloads.

Batch ProcessingIdempotencyDependenciesAArete
Handling a Production Pipeline FailureEasy

Describe a real production pipeline failure, how you diagnosed and fixed it, and what changes you made around orchestration, quality, and reruns.

InfrastructureIdempotencyQualityAArete
Data Lake vs Data WarehouseEasy

Tests data platform tradeoffs and recommendation skills for client needs at AArete.

InfrastructureToolsData ModelingAArete
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2
Coding3 questions · ~32 min
Top K Frequent Transaction TypesMedium
Practice

Aggregate transaction frequencies and return the top K types using a bounded min-heap.

Hash TablesaggregationCodingAArete
Cycle Detection in Dependency GraphHard

Tests algorithmic thinking for dependency graphs and correctness of cycle detection.

RecursionQueueGraphsAArete
Optimize Quadratic ScriptHard

Tests time complexity analysis and practical optimization strategies for large datasets.

Hash TablesArraysGreedyAArete
3
More topics3 questions · ~32 min
Rolling Average with Window FunctionsEasy
Practice

Calculate each Impact Recruitment Group consultant's three-day rolling average of completed placements.

Window FunctionssqlAArete
Healthcare Admissions Data ModelHard

Tests dimensional modeling and schema design for healthcare event data.

JoinsData WranglingData ModelingAArete
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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
SQL Window Functions Moving AverageMedium
Practice
Practice drill

Calculate a three-day moving average of active-client revenue using aggregation and SQL window functions.

Window FunctionsData AnalysissqlAAreteEEvalueserveSShyena Tech Yarns
SQL Window Functions Rolling AverageMedium
Practice
Practice drill

Calculate three-day rolling average sales by region using aggregation, joins, and PostgreSQL window functions.

Window FunctionssqlAAreteSSweetwaterKohl's
The finish line: interview-readyComplete all 11 questions plus 2 hands-on drills to finish this plan.