Top 34
Prep plan
Updated weekly · Last refresh Oct 17

DataScientest Data Scientist Interview Questions

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

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1
A/B Testing & ExperimentationStart here. 4 questions · ~34 min
2
Statistics & Probability3 questions · ~25 min
Interpreting Significance in ExperimentsMedium

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

Confidence IntervalsStatistical SignificanceP-ValuesDataScientest
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3
Machine Learning8 questions · ~68 min
Handling Missing Data in MLMedium

Explain practical strategies for handling missing data and how to validate that the chosen approach improves model performance.

Feature EngineeringData WranglingSupervised LearningDataScientest
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4
Behavioral & Leadership9 questions · ~76 min
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5
More topics10 questions · ~85 min
Evaluate Imbalanced Classification ModelMedium

How to evaluate a classification model when the classes are heavily imbalanced.

PrecisionAUC-ROCRecallDataScientest
Batch vs Streaming Data ProcessingEasy

Compare batch and streaming data processing, including when each fits best in a pipeline.

Stream ProcessingETLBatch ProcessingDataScientest
Diagnose KPI Drop After ReleaseMedium

Diagnose a post-release KPI drop by separating instrumentation issues from real behavior changes and tracing the problem through the metric hierarchy.

KPILeading IndicatorsDiagnosisDataScientest
Designing Product MetricsMedium

Assesses product sense and metric design aligned to user value and business goals.

North Star MetricKPIsProduct VisionDataScientest
SQL for Data AnalysisMedium

Assesses practical SQL skills for transforming and extracting insights from data.

JoinsData WranglingAggregationsDataScientest
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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 34 questions plus 2 hands-on drills to finish this plan.