Top 19
Prep plan
Updated weekly · Last refresh Oct 17
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Datatonic Data Scientist Interview Questions

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

19questions
~3htotal time
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1
MetricsStart here. 4 questions · ~35 min
Separate Retention From Short Term EngagementHard

Assess whether a feature drives durable retention gains or only a temporary spike in usage.

RetentionEngagement MetricsDDatatonic
Measure Core Feature EngagementMedium

Define the metrics that show whether engagement in a core feature is improving.

RetentionDiagnosisEngagement MetricsDDatatonic
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2
Statistics & Probability4 questions · ~35 min
Ensure Statistical SignificanceMedium

Tests your ability to plan experiments with appropriate power, error control, and validation.

experiment designStatistical SignificanceAnalysisDDatatonic
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3
Behavioral & Leadership5 questions · ~43 min
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4
More topics6 questions · ~52 min
SQL Window Functions Moving AverageMedium
Practice

Calculate a three-day moving average of active-client revenue using aggregation and SQL window functions.

Window FunctionsData AnalysissqlDDatatonic
Handle Missing Data in ML ModelsEasy

Choose a missing-data strategy for a supervised learning dataset and evaluate its impact on model quality.

Cross-ValidationFeature EngineeringRegularizationDDatatonic
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 TestingDDatatonic
North-Star Metrics for Subscription AppMedium

Evaluates product sense and metric design for a subscription mobile app in a data context.

product metricsuser engagementDDatatonic
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 MismatchDDatatonic
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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.