Top 22
Prep plan
Updated weekly · Last refresh Aug 30

Pathloom Data Scientist Interview Questions

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

22questions
~3htotal time
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1
SQL & Data ManipulationStart here. 3 questions + 2 drills · ~46 min
2
Statistics & Probability3 questions · ~26 min
Evaluating Observed Lift SignificanceMedium

Explain how to test whether an observed experiment lift is real using hypothesis testing, p-values, and confidence intervals.

Confidence IntervalsStatistical SignificanceP-ValuesPathloom
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3
Machine Learning4 questions · ~35 min
Experience with ML TechniquesEasy

Describe your hands-on experience applying supervised learning, feature engineering, and model evaluation in real projects.

Cross-ValidationFeature EngineeringSupervised LearningPathloom
Improving Model Quality with TuningMedium

Explain how to tune hyperparameters to improve validation performance while controlling overfitting and underfitting.

Hyperparameter TuningRegularizationGradient DescentPathloom
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4
Behavioral & Leadership7 questions · ~61 min
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5
More topics5 questions · ~44 min
Discovery UI Metrics and GuardrailsMedium

Define primary and guardrail metrics for a discovery UI test, with power, MDE, and a pre-registered analysis plan.

ExperimentationGuardrail MetricsA/B TestingPathloom
Analyze New Feature EngagementMedium

Assess a new feature using adoption, activation, repeat usage, and retention metrics tied to user value.

Leading IndicatorsA/B TestingEngagement MetricsPathloom
Finding Purchase Trends to Lift SalesMedium

Tests your ability to derive actionable business insights from customer purchase behavior.

User NeedsUse CasesProduct VisionPathloom
Diagnose Conversion Drop Post LaunchMedium

Diagnose why conversion fell from 4.8% to 3.1% after a launch by breaking the metric across funnel steps, cohorts, and segments.

Funnel AnalysisConversion RateDiagnosisPathloom
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The finish line: interview-readyComplete all 22 questions plus 2 hands-on drills to finish this plan.