Top 35
Prep plan
Updated weekly · Last refresh Aug 30

Lambda Data Scientist Interview Questions

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

35questions
~5htotal time
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1
Model EvaluationStart here. 9 questions · ~72 min
Detecting Model OverfittingEasy

Explain how to identify overfitting by comparing training and holdout performance and checking whether the model generalizes.

Cross-ValidationLog LossAccuracyLambda
Validate Suspected Classification OverfittingEasy

Assess whether a large train-to-validation gap indicates overfitting in an imagery triage classifier and recommend how to validate it.

Cross-ValidationBias-Variance TradeoffAccuracyLambda
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2
Machine Learning10 questions · ~80 min
Handling Missing and Noisy DataEasy

Explain a practical approach for handling missing values and noisy observations in a supervised learning dataset.

Cross-ValidationFeature EngineeringSupervised LearningLambda
Handle Missing Data in Hiring ModelsEasy

Build a candidate placement prediction model and explain how to handle missing values across mixed feature types in training and production.

Cross-ValidationFeature EngineeringSupervised LearningLambda
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3
Pipelines9 questions · ~72 min
Benchmarking GPU Memory UsageMedium

Tests your ability to measure and compare memory footprints to guide model and batch-size decisions.

InfrastructureToolsQualityLambda
Diagnosing CPU Bottlenecks in PyTorchHard

Tests your performance debugging skills and your ability to pinpoint bottlenecks in the input pipeline.

InfrastructureToolsQualityLambda
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4
Product Sense5 questions · ~40 min
Explain Research to Non-TechnicalEasy

Tests your communication clarity and ability to translate technical work into business value.

User NeedsValue PropositionProduct VisionLambda
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5
More topics2 questions · ~16 min
Classify Generative AI Research UpdatesEasy

Fine-tune a transformer to classify generative AI news and research updates into 5 categories for an internal knowledge-tracking workflow.

Language ModelsText ClassificationDeep LearningLambda
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The finish line: interview-readyComplete all 35 questions to finish this plan.