Top 35
Prep plan
Updated weekly · Last refresh Aug 30

Affine Data Scientist Interview Questions

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

35questions
~5htotal time
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1
SQL & Data ManipulationStart here. 4 questions + 2 drills · ~54 min
2
Machine Learning12 questions · ~101 min
Random Forest vs Gradient BoostingMedium

Compare Random Forest and Gradient Boosting, then choose the right ensemble for a supervised learning task.

Ensemble MethodsBias-Variance TradeoffSupervised LearningAffine
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3
Model Evaluation3 questions · ~25 min
R-squared vs Adjusted R-squaredEasy

Tests understanding of regression fit metrics and when to use adjusted measures.

Model MetricsAffine
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4
Behavioral & Leadership8 questions · ~68 min
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5
More topics8 questions · ~68 min
Interpreting Significance in ExperimentsMedium

Explain statistical significance in experiments and how p-values and confidence intervals guide interpretation.

Confidence IntervalsStatistical SignificanceP-ValuesAffine
Define Metrics for a Customer TestHard

Define the primary metric, guardrails, and power for a customer-facing A/B test before deciding whether to ship.

ExperimentationGuardrail MetricsA/B TestingAffine
Approach an NLP Classification ProjectEasy

Outline a practical NLP workflow, from tokenization and TF-IDF baselines to text classification and F1-based evaluation.

Language ModelsText ClassificationTokenizationAffine
Diagnose a Metric Drop After LaunchMedium

Investigate why a key KPI moved the wrong way after a product change and separate signal from noise.

Lagging IndicatorsLeading IndicatorsDiagnosisAffine
Churn Reduction Problem FramingHard

Tests end-to-end problem framing, target definition, and experimentation thinking for churn.

Hypothesis TestingAffine
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The finish line: interview-readyComplete all 35 questions plus 2 hands-on drills to finish this plan.