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Updated weekly · Last refresh Aug 30

Sopra Steria Data Scientist Interview Questions

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

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1
Machine LearningStart here. 7 questions · ~61 min
Bagging vs Boosting ExplainedMedium

Explain how bagging and boosting differ, and identify a representative algorithm for each ensemble method.

Ensemble Methodsmodel trainingSupervised LearningSopra Steria
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2
Behavioral & Leadership5 questions · ~43 min
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3
More topics11 questions · ~96 min
Analyze Customer Purchase Trends with Window FunctionsEasy
Practice

Calculate the monthly spending trends for customers using window functions and joins.

Sopra Steria
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 IndicatorsDiagnosisSopra Steria
Choose Regression Evaluation MetricsEasy

Pick the right metrics to evaluate a regression model and explain what each one tells you.

CalibrationMAERMSESopra Steria
Pitfalls in Streaming Experiment AnalysisHard

Identify major online experiment pitfalls and explain how they can bias results in a streaming product A/B test.

Network InterferenceNovelty EffectSample Ratio MismatchSopra Steria
Explaining P Values ClearlyEasy

Explain what a p-value means, how it relates to statistical significance, and how to describe it clearly to non-technical stakeholders.

CommunicationStatistical SignificanceP-ValuesSopra Steria
Design Cold Start RecommendationsHard

Design a recommendation system strategy for new users and new items when interaction history is sparse or missing.

Cold StartFeature StoreRecommendation SystemsSopra Steria
Delivering Value with Poor DataMedium

Tests data quality triage, pipeline design decisions, and pragmatic delivery of client outcomes.

Data Qualitydata integrationQualitySopra Steria
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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 23 questions plus 2 hands-on drills to finish this plan.