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Prep plan
Updated weekly · Last refresh Oct 17

Guardant Health Data Scientist Interview Questions

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

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1
PipelinesStart here. 5 questions · ~40 min
Clean Data for Visual AnalyticsEasy

Describe how you clean and preprocess data so dashboards stay accurate and usable.

Data WranglingETLQualityGuardant Health
Handle Incomplete Pipeline DataMedium

Approach for handling missing, inconsistent, and duplicate data in a pipeline without breaking downstream analytics.

Data WranglingETLQualityGuardant Health
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2
Machine Learning3 questions · ~24 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffGuardant Health
Feature Selection for PredictionMedium

Tests your approach to building predictive models with robust, relevant features.

Cross-ValidationFeature EngineeringBias-Variance TradeoffGuardant Health
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3
More topics4 questions · ~32 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 PropositionGuardant Health
Effective Statistical MethodsMedium

Tests your ability to choose appropriate statistical techniques for real data problems.

RegressionCorrelationHypothesis TestingGuardant Health
Data Drift Concept and VerificationMedium

Tests your ability to detect distribution shifts and validate them with appropriate methods.

CalibrationAUC-ROCThreshold TuningGuardant Health
Investigating Conflicting Model ResultsHard

Tests your model debugging, evaluation, and decision-making under uncertainty.

Cross-ValidationCalibrationAUC-ROCGuardant Health

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