Top 46
Prep plan
Updated weekly · Last refresh Oct 17

Zest AI Data Scientist Interview Questions

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

46questions
~6htotal time
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1
Machine LearningStart here. 13 questions · ~104 min
Bias Variance Tradeoff BasicsEasy

Explain how bias and variance affect generalization, and how model complexity changes the balance.

Cross-ValidationBias-Variance TradeoffSupervised LearningZest AI
Handling Imbalanced Fraud LabelsMedium

Explain how to train and evaluate models on highly imbalanced fraud data without relying on misleading accuracy.

Cross-ValidationFeature EngineeringSupervised LearningZest AI
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2
Product Sense4 questions · ~32 min
Prioritize Features for AI ProductsMedium

A framework for prioritizing AI product features based on user value, feasibility, evaluation quality, and trade-offs.

Feature PrioritizationValue PropositionZest AI
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3
Model Evaluation3 questions · ~24 min
Model Interpretation and Feature ImportanceHard

Evaluates your approach to model explainability and feature attribution for decision-making.

Zest AI
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4
SQL & Data Manipulation5 questions + 3 drills · ~70 min
5
A/B Testing & Experimentation3 questions · ~24 min
A/B Testing Pitfalls in FinanceHard

Tests understanding of experiment validity, risk controls, and statistical pitfalls in regulated domains.

financial servicesA/B TestingZest AI
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6
Behavioral & Leadership14 questions · ~112 min
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7
More topics4 questions · ~32 min
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 IndicatorsDiagnosisZest AI
Regression and Basic StatisticsEasy

Tests your fundamentals in statistical modeling concepts relevant to ML feature and target relationships.

RegressionstatisticsZest AI
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The finish line: interview-readyComplete all 46 questions plus 3 hands-on drills to finish this plan.