Top 21
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Updated weekly · Last refresh Aug 30

GM Financial Data Engineer Interview Questions

The questions to prepare for a GM Financial Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

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1
SQL & Data ManipulationStart here. 7 questions + 3 drills · ~86 min
Clustered vs Non-Clustered IndexesMedium

Explain how clustered and non-clustered indexes differ in storage, lookup behavior, and query performance.

JoinsData WranglingGM Financial
Optimizing Slow Sales QueriesEasy

Explain how to diagnose and optimize a slow SQL query using execution plans, indexing, and simpler query patterns.

JoinsData WranglingAggregationsGM Financial
Ensuring Data Quality at ScaleMedium

Assesses your data validation, consistency controls, and quality practices at scale.

Data Qualitylarge datasetsdata integrityGM Financial
Handling Production Query TimeoutsMedium

Assesses your incident response and performance troubleshooting for production SQL workloads.

sqlGM Financial
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Contact Center Agent Performance MetricsHard
Practice
Practice drill

Compute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.

ETLAggregationsData ModelingADP
Weekly Service KPI by TeamMedium
Practice
Practice drill

Analyze weekly service delivery performance by team using joins, a CTE, date aggregation, and KPI calculations.

KPIJoinssqlDeloitteReputation
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2
Pipelines5 questions · ~40 min
Describe a Complex Transformation PipelineMedium

Explain a complex ETL transformation you built, including the main challenges and how you handled them.

ETLData ModelingQualityGM Financial
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityGM Financial
Zero-Downtime Data MigrationHard

Tests your ability to plan and execute safe, low-risk data migrations.

system integrationETLdata migrationGM Financial
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3
Behavioral & Leadership9 questions · ~72 min
Leading an Ambiguous Data ProjectMedium

Tests ownership and stakeholder management in leading a data project from vague problem definition through delivery and measurable impact.

impactLeadershipOwnershipGM Financial
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The finish line: interview-readyComplete all 21 questions plus 3 hands-on drills to finish this plan.