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Updated weekly · Last refresh Sep 9

Lam Research Data Scientist Interview Questions

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

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1
PipelinesStart here. 4 questions · ~33 min
Large Dataset Analysis PipelineEasy

Discuss a large-scale data analysis project with focus on the pipeline, tooling, and data quality approach.

ToolsData ModelingQualityLam Research
Data Integration Tools ExperienceEasy

Discuss the data integration tools you have used and how they fit into ETL, orchestration, and data quality workflows.

InfrastructureToolsETLLam Research
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2
Machine Learning3 questions · ~25 min
Tune Hyperparameters for Model SelectionMedium

Choose hyperparameters with cross-validation and validation metrics, while balancing bias, variance, and overfitting.

Hyperparameter TuningCross-ValidationRegularizationLam Research
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3
Behavioral & Leadership4 questions · ~33 min
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4
More topics8 questions · ~66 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 PropositionLam Research
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 TestingLam Research
Analyze a Successful CampaignEasy

Describe how you would evaluate a successful marketing campaign using funnel KPIs, conversion, and ROI.

KPIsDiagnosisEngagement MetricsLam Research
Validating Predictive ModelsMedium

Tests model validation strategy, metrics selection, and avoiding data leakage.

Cross-ValidationAUC-ROCAccuracyLam Research
Optimizing Slow SQL QueriesMedium

Tests your ability to diagnose and improve SQL performance using query and indexing strategies.

Window FunctionsJoinsAggregationsLam Research
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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 19 questions plus 3 hands-on drills to finish this plan.