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Ernst & Young U.S. LLP Data Analyst Interview Questions

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

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1
SQL & Data ManipulationStart here. 5 questions + 3 drills · ~70 min
Understanding Common Table Expressions (CTEs)Medium
Recently asked

Explain what CTEs are and their advantages in SQL queries.

CTEsEErnst & Young U.S. LLP
Customer Orders: LEFT vs INNER JOINEasy
Recently asked

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

JoinsData WranglingGroup ByEErnst & Young U.S. LLP
Handling Nulls in JoinsMedium
Recently asked

Tests your approach to null handling and join logic to ensure correct results.

null handlingJoinsdata integrityEErnst & Young U.S. LLP
Optimizing Slow QueriesHard
Recently asked

Tests performance troubleshooting, query optimization techniques, and data-aware decision making.

Performance Tuningdatabase optimizationsqlEErnst & Young U.S. LLP
JOINs, WHERE, and HAVINGMedium

Tests your SQL knowledge of filtering and joining logic using subqueries.

SubqueriesJoinssqlEErnst & Young U.S. LLP
Finding Missing Numbers in SQLEasy
Practice
Practice drill

Find missing employee numbers in a fixed sequence using PostgreSQL generate_series and a left join.

sqlEErnst & Young U.S. LLP
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
Unify CRM and Google Analytics ViewHard
Practice
Practice drill

Merge CRM orders with GA events via an identity map to build a customer-level view using joins, window functions, and monthly rollups.

SubqueriesJoinsData WranglingArtefact

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2
Behavioral & Leadership8 questions · ~64 min
Resolving Conflict on a Client AccountMedium
Recently asked

Tests conflict resolution in a high-stakes team setting, including direct communication, stakeholder alignment, and ownership of the outcome.

Conflict ResolutionimpactCommunicationEErnst & Young U.S. LLP
Maintaining Integrity Under Delivery PressureEasy
Recently asked

Tests integrity in execution: whether you uphold standards under pressure, communicate transparently, and take ownership for the outcome.

Stakeholder ManagementCommunicationOwnershipEErnst & Young U.S. LLP
Explaining Complex Analysis to Nontechnical StakeholdersMedium
Recently asked

Tests communication of complex analytics to nontechnical stakeholders, with emphasis on influence, clarity, and driving action from insights.

Stakeholder ManagementCommunicationtechnicalEErnst & Young U.S. LLP
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The finish line: interview-readyComplete all 13 questions plus 3 hands-on drills to finish this plan.