Dataford
Top 22
Prep plan
Updated weekly · Last refresh Aug 30
E

Extia Data Scientist Interview Questions

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

22questions
~3htotal time
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1
Machine LearningStart here. 4 questions · ~32 min
Preferred Data Processing ToolsEasy
Recently asked

Tests practical engineering choices for data pipelines and justification of tradeoffs.

data processingToolsEExtia
Keeping Up With Data ScienceEasy
Recently asked

Tests continuous learning habits and ability to adopt relevant techniques.

industry trendsprofessional developmentcontinuous learningEExtia
Validate a Complex ModelHard
Recently asked

Tests model explanation depth and rigor of validation methodology.

model validationimplementationEExtia
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2
Behavioral & Leadership13 questions · ~104 min
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3
More topics5 questions · ~40 min
Design an A/B TestMedium
Recently asked

Tests experimental design skills including metrics, randomization, and analysis plan.

experiment designfeature evaluationA/B TestingEExtia
Statistical Significance in PracticeMedium
Recently asked

Tests understanding of statistical significance and correct application in data science decisions.

Hypothesis TestingData AnalysisStatistical SignificanceEExtia
SQL Window Functions UsageMedium
Recently asked

Tests SQL proficiency and ability to apply window functions to real analytical problems.

Window FunctionsData ManipulationsqlEExtia
Diagnose a Metric DropMedium
Recently asked

Tests causal thinking, instrumentation awareness, and troubleshooting of product analytics.

product metricsAnalysisEExtia
Common A/B Testing PitfallsMedium
Recently asked

Tests awareness of experimental threats like bias, leakage, and incorrect randomization.

A/B TestingEExtia

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Window Functions Moving AverageMedium
Practice
Practice drill

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

Window FunctionsData AnalysissqlAAreteMITREGlassdoor
Rolling 7-Day Incident AverageMedium
Practice
Practice drill

Calculate a calendar-aware 7-day average of Samsara incident counts using CTEs and window functions.

Window FunctionsData AnalysissqlSamsara
Rolling 7-Day Average in SQLMedium
Practice
Practice drill

Calculate calendar-aware 7-day sensor anomaly averages per Mercedes-Benz vehicle using daily aggregation and window functions.

Window FunctionsData AnalysissqlMercedes-Benz Group
The finish line: interview-readyComplete all 22 questions plus 3 hands-on drills to finish this plan.