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Updated weekly · Last refresh Oct 17

Citizens Data Scientist Interview Questions

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

30questions
~4htotal time
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1
SQL & Data ManipulationStart here. 4 questions + 2 drills · ~54 min
2
Statistics & Probability3 questions · ~25 min
Statistical Significance EvaluationMedium

Tests hypothesis testing intuition, p-values or confidence intervals, and correct interpretation.

Hypothesis TestingStatistical SignificanceP-ValuesCitizens
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3
Machine Learning3 questions · ~25 min
Choosing Most Important FeaturesMedium

Tests feature selection methods and ability to justify choices for a predictive task.

Cross-ValidationFeature EngineeringSupervised LearningCitizens
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4
Product Sense3 questions · ~25 min
What Is a Data Scientist at CitizensEasy

Tests understanding of the role and how you connect data science work to banking outcomes.

User NeedsProduct VisionCitizens
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5
Behavioral & Leadership12 questions · ~101 min
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6
More topics5 questions · ~42 min
Experimentation PitfallsHard

Tests understanding of A/B testing validity and ability to diagnose common experiment failures.

Network InterferenceNovelty EffectSample Ratio MismatchCitizens
Choosing Classification Evaluation MetricsEasy

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

PrecisionAccuracyRecallCitizens
Diagnose a Metric Drop After LaunchMedium

Investigate why a key KPI moved the wrong way after a product change and separate signal from noise.

Lagging IndicatorsLeading IndicatorsDiagnosisCitizens
Design a Feature-Concept A/B StudyHard

Design an A/B test to compare two feature concepts, including hypothesis, metrics, power, and a pre-registered decision rule.

ExperimentationGuardrail MetricsA/B TestingCitizens
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