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Prep plan
Updated weekly · Last refresh Aug 30

Digitas Data Scientist Interview Questions

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

50questions
~7htotal time
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1
SQL & Data ManipulationStart here. 10 questions + 2 drills · ~110 min
2
Statistics & Probability10 questions · ~90 min
Marketing Email A/B Test SignificanceEasy

Determine whether a higher email campaign conversion rate is statistically significant using a two-proportion z-test.

Hypothesis TestingStatistical SignificanceP-ValuesDigitas
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3
Machine Learning10 questions · ~90 min
Bagging vs Boosting ExplainedMedium

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

Ensemble Methodsmodel trainingSupervised LearningDigitas
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4
Model Evaluation9 questions · ~81 min
Choose Metrics for Imbalanced DataMedium

Choose the right evaluation metric for an imbalanced dataset and explain why accuracy can mislead.

F1 ScorePrecisionAUC-ROCDigitas
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5
Pipelines3 questions · ~27 min
Cloud AI Deployment Pipeline ExperienceMedium

Discuss experience building cloud-based AI pipelines, including orchestration, processing patterns, infrastructure choices, and data quality controls.

InfrastructureToolsQualityDigitas
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6
More topics8 questions · ~72 min
Measure Marketing Campaign IncrementalityMedium

Design an incrementality test for a new customer marketing campaign with explicit MDE, guardrails, power, and rollout criteria.

ExperimentationHypothesis TestingGuardrail MetricsDigitas
Align Product With User NeedsMedium

A framework for connecting user needs to business goals, then making product decisions with clear trade-offs and measurable outcomes.

User NeedsValue PropositionProduct VisionDigitas
Deep-Dive Churn AnalysisMedium

Assesses approach to diagnosing churn drivers and turning them into actionable insights.

RetentionChurnDiagnosisDigitas
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.