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Health Catalyst Interview Questions

The questions to prepare for Health Catalyst interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

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1
SQL & Data ManipulationStart here. 6 questions · ~56 min
2
Coding5 questions · ~47 min
Check If Two Strings Are AnagramsEasy
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Determine whether two strings are anagrams using frequency counting in linear time.

Hash Tablestime complexityStringsHealth Catalyst
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3
Pipelines6 questions · ~56 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityHealth Catalyst
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4
Execution6 questions · ~56 min
Describe a Challenging ProjectEasy

Share a challenging project, your role, the risks and trade-offs you managed, and the final outcome.

Trade-offsRoadmappingRisk AssessmentHealth Catalyst
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5
Machine Learning3 questions · ~28 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffHealth Catalyst
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6
Metrics5 questions · ~47 min
Using Metrics to Drive DecisionsEasy

Explain how you used a KPI and supporting metrics to diagnose a product issue and make a concrete product decision.

Funnel AnalysisKPIsLeading IndicatorsHealth Catalyst
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7
More topics19 questions · ~178 min
Staying Current on Industry TrendsEasy

A practical approach for tracking industry trends, competitor moves, and market changes in a way that informs strategy decisions.

EstimationCompetitive AnalysisGrowth StrategyHealth Catalyst
Design Feature Drift Monitoring SystemHard

Design a production ranking system with robust feature drift monitoring across batch and real-time features at high QPS.

Feature StoreFeature DriftModel ServingHealth Catalyst
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