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Updated weekly · Last refresh Aug 30

OSF HealthCare Data Engineer Interview Questions

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

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1
PipelinesStart here. 9 questions · ~83 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityOSF HealthCare
Design Scalable Pipeline InfrastructureHard

Design the core pipeline infrastructure for a new project, with attention to orchestration, data quality, idempotency, and future scale.

InfrastructureToolsQualityOSF HealthCare
Explain ETL in Data EngineeringEasy

Explain the ETL process, why it matters, and how it fits into a practical data pipeline.

ETLOrchestrationQualityOSF HealthCare
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2
More topics5 questions · ~46 min
Merge Two Sorted Linked ListsEasy
Practice

Merge two sorted singly linked lists into one sorted list by relinking existing nodes.

RecursionLinked ListsSortingOSF HealthCare
Optimizing Slow SQL QueriesHard

Tests performance troubleshooting, indexing, query plans, and SQL optimization skills.

Window FunctionsJoinsAggregationsOSF HealthCare
SQL and Querying LanguagesEasy

Tests breadth and depth of querying skills used to extract data for OSF HealthCare reporting.

JoinsData WranglingAggregationsOSF HealthCare
Time Complexity and OptimizationMedium

Tests algorithm analysis and your ability to improve performance based on complexity.

ArraysSortingGreedyOSF HealthCare
Motivation and Team FitMedium

Assesses motivation for healthcare and your approach to handling team situations at OSF HealthCare.

team fitOSF HealthCare

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Readmission RateMedium
Practice
Practice drill

Calculate the CHOP 30-day readmission rate using date filtering and conditional aggregation.

Date FunctionsJoinsAggregationsChildren's Hospital of PhiladelphiaOSF HealthCareProvidence
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
The finish line: interview-readyComplete all 14 questions plus 3 hands-on drills to finish this plan.