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Updated weekly · Last refresh Aug 30

Resupply Data Scientist Interview Questions

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

20questions
~3htotal time
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1
A/B Testing & ExperimentationStart here. 6 questions · ~48 min
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchResupply
Design A/B Test for Donation FlowMedium

Evaluates your experimental design approach for product changes affecting donors.

experiment designResupply
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2
Product Sense3 questions · ~24 min
Define Metrics for New FeaturesMedium

Define a success metric for a new feature that captures real user value, not just raw usage.

MetricsFeature Prioritizationuser valueResupply
Balance Conversion and RetentionHard

Framework for deciding when to favor short-term conversion gains versus long-term retention in a product decision.

Feature PrioritizationUser NeedsValue PropositionResupply
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3
SQL & Data Manipulation4 questions + 3 drills · ~62 min
Join Donor Lifecycle TablesMedium

Evaluates your SQL skills for building end-to-end analytical views.

data relationshipsJoinsResupply
Time Zone Aggregation PitfallsMedium

Assesses your awareness of data correctness issues in time-based aggregation.

Data QualityResupply
Top Users by Recent Transaction VolumeMedium
Practice
Practice drill

Find the top 3 users by completed transaction volume in the last 30 days using joins and aggregation.

Data Analysisquery optimizationsqlTTier 1 BankRevolutChime
SQL Data Quality ChecksHard
Practice
Practice drill

Detect missing fields, duplicate transaction keys, invalid amounts, and merchant reference issues with PostgreSQL CTEs and joins.

Data Qualitynull handlingdata integritySigmoid
Second Attempt Score Per UserEasy
Practice
Practice drill

Use ROW_NUMBER to return each student's second score on a specified Khan Academy exercise.

Data Analysissqluser engagementKhan Academy
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4
Behavioral & Leadership5 questions · ~40 min
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5
More topics2 questions · ~16 min
Investigate User Engagement DeclineMedium

Investigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.

RetentionDiagnosisEngagement MetricsResupply
Define and Validate MetricsMedium

Tests your approach to selecting, validating, and operationalizing metrics for product decisions.

product metricsResupply
The finish line: interview-readyComplete all 20 questions plus 3 hands-on drills to finish this plan.