Top 45
Prep plan
Updated weekly · Last refresh Oct 17

SIXT Data Scientist Interview Questions

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

45questions
~6htotal time
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1
A/B Testing & ExperimentationStart here. 6 questions · ~50 min
2
Machine Learning7 questions · ~58 min
Handling Imbalanced Fraud LabelsMedium

Explain how to train and evaluate models on highly imbalanced fraud data without relying on misleading accuracy.

Cross-ValidationFeature EngineeringSupervised LearningSIXT
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3
Product Sense7 questions · ~58 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 valueSIXT
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4
Metrics4 questions · ~33 min
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 IndicatorsDiagnosisSIXT
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5
Behavioral & Leadership13 questions · ~109 min
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6
More topics8 questions · ~67 min
Interpreting Significance in ExperimentsMedium

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

Confidence IntervalsStatistical SignificanceP-ValuesSIXT
RAG System for Customer SupportHard

Evaluates system design choices for retrieval, generation, and quality control in a support use case.

customer supportRAGSIXT
SQL Window Functions for Period ComparisonMedium
Practice

Compare each location's monthly revenue with its prior month using a window function.

Window FunctionsLag/LeadDate FunctionsSIXT
Evaluate LLMs for QualityMedium

Tests your approach to evaluating LLM quality, reliability, and business readiness.

generative aiSIXT
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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 45 questions plus 2 hands-on drills to finish this plan.