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Updated weekly · Last refresh Aug 30

PRGX Global Data Scientist Interview Questions

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

22questions
~3htotal time
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1
Machine LearningStart here. 12 questions · ~98 min
Regression vs Classification BasicsEasy

Explain how regression and classification differ, including target type, outputs, and how you evaluate each.

Feature EngineeringSupervised LearningPRGX Global
Prevent Overfitting in ML ModelsEasy

Explain how to reduce overfitting using regularization, validation, and model selection.

Cross-ValidationBias-Variance TradeoffRegularizationPRGX Global
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2
Model Evaluation4 questions · ~33 min
Validate Model GeneralizationMedium

How to validate that a model will generalize to unseen data using holdouts, cross-validation, and calibration checks.

Hyperparameter TuningCross-ValidationBias-Variance TradeoffPRGX Global
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3
More topics6 questions · ~49 min
Motivation for Data Engineering WorkEasy

Explain what drives your interest in data engineering, grounded in user needs and the value created by reliable data systems.

Jobs to Be DoneUser NeedsValue PropositionPRGX Global
A/B Testing for Product FeaturesMedium

Explain how to design and evaluate an A/B test for a product feature, including metrics, MDE, sample size, and guardrails.

Hypothesis TestingStatistical SignificanceA/B TestingPRGX Global
SQL Query Performance TuningMedium

Tests query optimization skills and practical understanding of data access patterns.

JoinsData WranglingAggregationsPRGX Global
Deriving Actionable InsightsMedium

Tests exploratory analysis, metric thinking, and translating findings into business actions.

KPIsLeading IndicatorsDiagnosisPRGX Global
Fine-Tuning LLMsHard

Evaluates your understanding of LLM fine-tuning and practical experience applying it.

Language ModelsFine-TuningPRGX Global
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 22 questions plus 3 hands-on drills to finish this plan.