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Prep plan
Updated weekly · Last refresh Sep 21
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SumUp Data Scientist Interview Questions

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

19questions
~3htotal time
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1
A/B Testing & ExperimentationStart here. 5 questions · ~43 min
Design Test for New FeatureMedium

Design an A/B test for a new platform feature, including success metrics, power, guardrails, and a clear ship decision.

experiment designfeature evaluationA/B TestingSSumUp
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2
Behavioral & Leadership4 questions · ~35 min
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3
More topics10 questions · ~86 min
Top Merchants QueryEasy
Practice

Use aggregation and joins to return the 10 merchants with the highest transaction counts.

JoinsGroup BysqlSSumUp
Describe an ML Project End to EndMedium

Explain a machine learning project you led, from problem framing through model evaluation and deployment.

Cross-ValidationFeature EngineeringSupervised LearningSSumUp
Analyze New Feature EngagementMedium

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

Leading IndicatorsA/B TestingEngagement MetricsSSumUp
Define Metrics for New FeaturesMedium

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

MetricsFeature Prioritizationuser valueSSumUp
Statistical Methods for A/B TestsMedium

Assesses your toolkit for analyzing experiments, including tests and effect estimation.

Data AnalysisSSumUp
Good Code PracticesEasy

Assesses coding discipline, readability, and maintainability in data science work.

best practicescode qualitytechnical knowledgeSSumUp
Handling Missing and Dirty SQL DataMedium

Explain how to profile, clean, and standardize missing or dirty data before analysis.

Data WranglingCase WhenQualitySSumUp
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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
The finish line: interview-readyComplete all 19 questions plus 2 hands-on drills to finish this plan.