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Updated weekly · Last refresh Aug 30

State Street Data Scientist Interview Questions

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

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1
Machine LearningStart here. 8 questions · ~64 min
Bias-Variance Tradeoff in PracticeMedium

Explain the bias-variance tradeoff and how it guides model choice, regularization, and generalization performance.

Cross-ValidationBias-Variance TradeoffRegularizationState Street
Handling Missing Values in MLEasy

Explain practical strategies for handling missing values in a supervised learning workflow, from diagnosis to modeling and validation.

Cross-ValidationFeature EngineeringRegularizationState Street
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2
Metrics3 questions · ~24 min
Diagnose a Customer Satisfaction DropMedium

Investigate a sudden drop in customer satisfaction and separate leading signals from the final NPS readout.

NPSLeading IndicatorsDiagnosisState Street
Investigate User Engagement DeclineMedium

Investigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.

RetentionDiagnosisEngagement MetricsState Street
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3
More topics7 questions · ~56 min
Choosing Classification Evaluation MetricsEasy

Explain which classification metrics to use and how metric choice depends on the business objective and error tradeoffs.

PrecisionAccuracyRecallState Street
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchState Street
Designing Experiments for StrategiesHard

Tests experimental design for evaluating investment strategies with sound statistical methodology.

ExperimentationHypothesis TestingA/B TestingState Street
Role of a Data ScientistEasy

Tests understanding of the Data Scientist role in financial services and how it delivers value.

User NeedsValue PropositionProduct VisionState Street
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The finish line: interview-readyComplete all 18 questions to finish this plan.