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Updated weekly · Last refresh Aug 30

Ernst & Young Data Analyst Interview Questions

The questions to prepare for a Ernst & Young Data Analyst interview. Questions from real interview reports rank first. Updated weekly.

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1
SQL & Data ManipulationStart here. 12 questions + 3 drills · ~126 min
Window Function vs GROUP BYMedium
Recently asked

Tests correct choice of SQL aggregation patterns for different analytical needs.

Window FunctionsGroup BysqlErnst & Young
Handling Missing or Inconsistent DataMedium
Recently asked

Tests data cleaning judgment and strategies for maintaining analysis integrity at scale.

data cleaningdata handlingdata integrityErnst & Young
Pandas for Data ManipulationMedium
Recently asked

Tests practical Python tooling choices and reasoning for data manipulation workflows.

pandasData ManipulationpythonErnst & Young
Analyze Customer Purchase Trends with Window FunctionsEasy
Practice
Recently asked
Practice drill

Calculate the monthly spending trends for customers using window functions and joins.

The Home DepotAvisoWorld Wide Technology
Average Vehicle Idle Time by ZoneHard
Practice
Practice drill

Use joins, a CTE, and aggregations to calculate average vehicle idle minutes in a specific geographic zone.

JoinsData ManipulationsqlWaymo
Top Clinics by Patient VolumeMedium
Practice
Practice drill

Rank Oracle Health EHR clinics by distinct completed patients using aggregation and ROW_NUMBER().

Window Functionsquery optimizationsqlOOracle Health
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2
Statistics & Probability9 questions · ~72 min
Backtest Results InterpretationMedium
Recently asked

Tests ability to translate backtest outputs into business-relevant conclusions and risks.

Model EvaluationErnst & Young
Model Robustness and OverfittingMedium
Recently asked

Tests statistical thinking, validation strategy, and overfitting mitigation techniques.

Statistical SignificanceModel EvaluationoverfittingErnst & Young
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3
Behavioral & Leadership17 questions · ~136 min
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4
More topics3 questions · ~24 min
Data Cleaning with PythonMedium
Recently asked

Tests hands-on Python data cleaning skills and practical handling of messy datasets.

data cleaningData ManipulationpythonErnst & Young
Metrics for Backtest PerformanceMedium
Recently asked

Tests ability to choose appropriate performance metrics and interpret them for strategy assessment.

MetricsModel EvaluationErnst & Young
Evaluating Success of Business StrategyMedium
Recently asked

Tests KPI selection, measurement design, and linking analytics to business outcomes.

business strategysuccess metricsErnst & Young
The finish line: interview-readyComplete all 41 questions plus 3 hands-on drills to finish this plan.