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Prep plan
Updated weekly · Last refresh Aug 30

Otsuka Data Scientist Interview Questions

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

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1
Machine LearningStart here. 4 questions · ~32 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 TradeoffOtsuka
Compare Machine Learning AlgorithmsHard

Tests breadth of ML knowledge and ability to match algorithms to problem constraints.

Unsupervised LearningBias-Variance TradeoffSupervised LearningOtsuka
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2
Statistics & Probability6 questions · ~48 min
Programmatically Handle OutliersEasy

Tests data quality handling and statistical judgment for robust modeling.

outliersRegressionData WranglingOtsuka
Healthcare Statistical AnalysisMedium

Tests ability to apply statistics to healthcare problems and interpret results responsibly.

RegressionHypothesis TestingStatistical SignificanceOtsuka
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3
More topics6 questions · ~48 min
Handling Missing DataHard

Tests data quality handling and correct treatment of missingness.

Window FunctionsData WranglingCTEsOtsuka
Classification Model Performance MetricsEasy

Tests knowledge of classification evaluation metrics and when to use them.

PrecisionAccuracyRecallOtsuka
Role of Associate Director, AI and Data ScientistEasy

Tests understanding of organizational roles and expectations for AI and data leadership at Otsuka.

Value PropositionUse CasesProduct VisionOtsuka
Optimize a Slow SQL QueryHard

Tests your query-tuning skills, including execution plans, indexing, and reducing unnecessary work.

SubqueriesData WranglingCTEsOtsuka
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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 16 questions plus 3 hands-on drills to finish this plan.