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Updated weekly · Last refresh Oct 17

Guy Carpenter Data Engineer Interview Questions

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

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1
SQL & Data ManipulationStart here. 4 questions + 2 drills · ~56 min
Finding Duplicate RecordsEasy
Practice

Find duplicate customer emails using GROUP BY and HAVING in PostgreSQL.

Group ByHavingAggregationsGuy Carpenter
Write-Heavy vs Read-Heavy WorkloadsMedium

Tests workload-aware database design decisions for reliable, performant data engineering.

sql basicspostgresqlperformanceGuy Carpenter
Indexing and Query OptimizationHard

Tests indexing knowledge and practical performance tuning for large insurance transaction datasets.

Performance TuningindexessqlGuy Carpenter
SQL Query OptimizationMedium
Practice
Practice drill

Optimize a slow PostgreSQL query that aggregates completed transactions while preserving customers with no matching activity.

Performance Tuningdatabase optimizationindexesDDroisysCapgeminiNomura
Top N Without FunctionsMedium
Practice
Practice drill

Return the three highest active employee salary levels, including ties, and explain PostgreSQL indexing and plan tuning.

Performance Tuningdatabase optimizationindexesCiti
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2
More topics7 questions · ~64 min
Handling Architectural Stakeholder ConflictMedium

Tests conflict resolution and influence when a stakeholder challenges an architectural decision with meaningful business or technical stakes.

Conflict ResolutionStakeholder ManagementCommunicationGuy Carpenter
Graph Coding ProblemMedium

Evaluates your ability to reason about graph problems and implement an efficient solution.

coding challengeGuy Carpenter
ORM vs Raw SQL Trade-offsMedium

Tests judgment on abstraction vs control for performance, maintainability, and correctness.

sql experiencetechnical discussionFrameworksGuy Carpenter
Designing a Safe Real-Time APIHard

Tests API design, security, and performance considerations for delivering risk analytics to clients.

rest apissolution designtechnical discussionGuy Carpenter
Django Architecture and ORMMedium

Tests backend framework understanding and how ORM abstractions map to SQL and PostgreSQL behavior.

databasetechnical discussionFrameworksGuy Carpenter
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