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Updated weekly · Last refresh Oct 15

PNY Data Scientist Interview Questions

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

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1
Machine LearningStart here. 7 questions · ~64 min
Feature Engineering for New ModelsMedium

Explain a practical framework for feature engineering, from raw data review to validation of feature impact on held-out data.

Feature EngineeringModel EvaluationSupervised LearningPNY
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2
SQL & Data Manipulation4 questions + 1 drill · ~46 min
SQL Join TypesMedium

Assesses your SQL fundamentals for combining datasets correctly.

JoinssqlPNY
SQL and Data Visualization InsightsMedium
Practice
Practice drill

Write SQL to compare listing performance over time and explain the insights and visualization.

analytics toolsJoinssqlAirbnb
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3
Behavioral & Leadership8 questions · ~73 min
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4
More topics7 questions · ~64 min
Statistical Significance in Hypothesis TestingEasy

Explain what statistical significance means and why it matters when interpreting experimental or analytical results.

Hypothesis TestingData AnalysisStatistical SignificancePNY
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 MismatchPNY
Beyond Accuracy for ClassificationMedium

Assesses your understanding of classification metrics and trade-offs for decision-making.

Classificationevaluation metricsPrecisionPNY
Maintain Model PerformanceHard

Tests your monitoring, retraining, and operational discipline for production models at Principal Financial Group.

InfrastructuremonitoringQualityPNY
Diagnosing Metric DropsHard

Tests root-cause analysis and structured debugging of product metric changes.

performance analysisPNY
Design User Engagement MetricMedium

Tests metric design and operationalization for measuring FIRSTNET GLOBAL user engagement.

product metricsdesignuser engagementPNY
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The finish line: interview-readyComplete all 26 questions plus 1 hands-on drill to finish this plan.