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~4h total · Updated weekly · Last refresh Aug 9

PayU Data Scientist Interview Questions

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

Handling Imbalanced Fraud LabelsMedium

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

Cross-ValidationFeature EngineeringSupervised Learning
PayU
Logistic Regression Intuition
Medium

Tests understanding of logistic regression and its probabilistic interpretation.

Feature EngineeringSupervised LearningGradient Descent
PayU
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Central Limit Theorem in Practice
Medium

Assesses understanding of CLT and how you apply it in real work.

Central Limit Theoremstatistics fundamentals
PayU
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Estimating Marketing Campaign ROI
Medium

Assesses ability to build ROI estimates from data and assumptions.

roi
PayU
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Common Pitfalls in Experiment Results
Hard

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

PeekingNovelty EffectSample Ratio Mismatch
PayU
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SQL Basics: Indexes and Joins
Medium

Assesses foundational SQL knowledge for querying and performance considerations.

Joinssql
PayU
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Real-Time Transaction Anomaly Detection
Hard

Tests system design skills for real-time anomaly detection on transaction streams.

anomaly detection
PayU