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Hennepin County, Minnesota Software Engineer Interview Questions

The questions to prepare for a Hennepin County, Minnesota Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
PipelinesStart here. 3 questions · ~24 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityHennepin County, Minnesota
Legacy Data Migration ConsistencyHard

Approach for keeping data consistent during a legacy-to-new-platform migration, including validation, replay safety, and reconciliation.

ETLData ModelingQualityHennepin County, Minnesota
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2
Execution32 questions · ~256 min
Balance Debt Against Feature DeliveryMedium

Explain how you would balance technical debt reduction with feature delivery when stakeholders want visible progress but engineering risk is rising.

Trade-offsRisk AssessmentScope ManagementHennepin County, Minnesota
Escalate and Contain Critical BugEasy

Describe how you handled a critical bug by assessing risk, aligning stakeholders, defining severity, and driving containment to resolution.

Success CriteriaRisk AssessmentQualityHennepin County, Minnesota
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3
SQL & Data Manipulation4 questions + 3 drills · ~62 min
Optimize SQL for Large DatasetsMedium

Evaluates your SQL performance tuning skills for reporting and operational workloads.

JoinsData WranglingAggregationsHennepin County, Minnesota
Case Management Database SchemaHard

Evaluates your data modeling skills for a case management domain with correctness and scalability needs.

JoinsAggregationsData ModelingHennepin County, Minnesota
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
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
Resolve Conflicting Customer AttributesMedium
Practice
Practice drill

Use joins, CTEs, and row ranking to resolve conflicting customer profile values across ACME House systems.

JoinsData WranglingQualityRamsey SolutionsACME House
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4
Coding5 questions · ~40 min
Complex Feature With Limited DocsMedium

Evaluates your problem-solving and engineering execution when information is incomplete.

RecursionHash TablesArraysHennepin County, Minnesota
Full-Stack Quality and SecurityMedium

Evaluates your end-to-end engineering practices for quality, security, and maintainability.

Hash TablesArraysStringsHennepin County, Minnesota
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5
Behavioral & Leadership6 questions · ~48 min
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The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.