Top 28
Prep plan
Updated weekly · Last refresh Aug 30

Chenega Data Scientist Interview Questions

The questions to prepare for a Chenega Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

28questions
~4htotal time
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1
A/B Testing & ExperimentationStart here. 3 questions · ~24 min
Power Analysis for Survey ExperimentHard

Determine sample size and power for a customer survey or experiment, including MDE, guardrails, and a disciplined decision rule.

MDEPower AnalysisSample SizeChenega
Primary vs Guardrail MetricsEasy

Explain how a primary metric differs from a guardrail metric and how both are used in A/B test decisions.

ExperimentationGuardrail MetricsA/B TestingChenega
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2
Machine Learning10 questions · ~80 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 TradeoffChenega
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3
SQL & Data Manipulation3 questions + 3 drills · ~54 min
4
Behavioral & Leadership6 questions · ~48 min
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5
More topics6 questions · ~48 min
Improve Subscription Customer RetentionMedium

Framework for diagnosing churn and prioritizing product changes to improve retention in a subscription service.

User NeedsUse CasesProduct VisionChenega
Balancing Accuracy and InterpretabilityMedium

Tests tradeoff thinking between model performance and explainability for decision-making.

PrecisionAccuracyRecallChenega
Testing Statistical SignificanceEasy

Tests statistical reasoning for deciding whether results reflect real signal versus noise.

Hypothesis TestingStatistical SignificanceP-ValuesChenega
Defining Retention MetricsMedium

Tests product analytics thinking and metric design for retention outcomes.

North Star MetricRetentionLeading IndicatorsChenega
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The finish line: interview-readyComplete all 28 questions plus 3 hands-on drills to finish this plan.