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Lawrence Berkeley Lab Interview Questions

The questions to prepare for Lawrence Berkeley Lab interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

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1
ExecutionStart here. 6 questions · ~49 min
2
Machine Learning6 questions · ~49 min
Prevent Overfitting in ML ModelsEasy

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

Cross-ValidationBias-Variance TradeoffRegularizationLawrence Berkeley Lab
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3
Metrics6 questions · ~49 min
Using Metrics to Drive DecisionsEasy

Explain how you used a KPI and supporting metrics to diagnose a product issue and make a concrete product decision.

Funnel AnalysisKPIsLeading IndicatorsLawrence Berkeley Lab
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4
Product Sense6 questions · ~49 min
Prioritize Features for a New ProductMedium

A framework for deciding which features should ship first when building a new product.

Feature PrioritizationUser Needsproduct developmentLawrence Berkeley Lab
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5
Coding3 questions · ~24 min
Symmetric vs Asymmetric EncryptionEasy

Explain how symmetric and asymmetric encryption differ in key usage, performance, and common application patterns.

MathArraysLawrence Berkeley Lab
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6
Model Evaluation4 questions · ~32 min
Improve Underperforming Model AccuracyMedium

Approach for diagnosing an underperforming model and improving accuracy through error analysis, feature work, tuning, and bias variance tradeoffs.

Cross-ValidationAccuracyThreshold TuningLawrence Berkeley Lab
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7
More topics19 questions · ~154 min
Handling Missing DataHard

Tests data quality handling and correct treatment of missingness.

Window FunctionsData WranglingCTEsLawrence Berkeley Lab
Recommending with Limited DataMedium

Structured approach for making a strategic recommendation when data is limited and uncertainty is high.

Decision Makinganalytical thinkingProblem SolvingLawrence Berkeley Lab
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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 50 questions plus 3 hands-on drills to finish this plan.