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Updated weekly · Last refresh Aug 30

Google Research Scientist Interview Questions

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

50questions
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1
CodingStart here. 12 questions · ~106 min
Markov Chains and Steady StateMedium
Practice

Simulate an Upstart state-transition model and compute its stationary distribution using iterative matrix multiplication.

Basic AlgorithmsMatrixpythonGoogle
Analyze Algorithm Time and SpaceEasy

Explain how to analyze an algorithm’s time and space complexity and justify the final Big O bounds.

MathArraysGreedyGoogle
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2
Execution8 questions · ~71 min
Operationalize Inclusive Hiring for Google ResearchEasy

Plan a 10-week pilot to improve inclusive hiring for Google Research without slowing interview throughput or violating policy.

Trade-offsSuccess CriteriaRisk AssessmentGoogle
Resume Deep Dive Execution PlanEasy

Explain how to prepare and execute a research scientist resume deep dive with clear priorities, stakeholder awareness, and risk management.

Trade-offsRisk AssessmentScope ManagementGoogle
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3
Machine Learning13 questions · ~115 min
Screen YouTube Spam with BaselinesEasy

Build and compare logistic regression and a simple neural model for YouTube spam classification using text and metadata.

Feature EngineeringDeep LearningSupervised LearningGoogle
Bias-Variance Tradeoff in PracticeMedium
Recently asked

Explain the bias-variance tradeoff and how it guides model choice, regularization, and generalization performance.

Cross-ValidationBias-Variance TradeoffRegularizationGoogle
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4
Model Evaluation4 questions · ~35 min
Evaluate Models in ProductionHard
Recently asked

How to evaluate a production model using calibration, thresholds, and confusion matrix tradeoffs.

CalibrationAccuracyThreshold TuningGoogle
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5
Statistics & Probability12 questions · ~106 min
Incrementality Test Without Full RandomizationHard

Design a credible incrementality test under partial randomization, using quasi-experimental methods and valid statistical inference.

ExperimentationHypothesis TestingCausal InferenceGoogle
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6
More topics1 question · ~9 min
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