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Cohesity Applied Scientist Interview Questions

The questions to prepare for a Cohesity Applied Scientist interview. Questions from real interview reports rank first. Updated daily.

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1
CodingStart here. 3 questions · ~25 min
Explain Time Complexity of Array SearchEasy

Explain how to analyze the time complexity of a common array search solution and justify the Big O result.

MathArraysSearchingCohesity
Optimizing Sorting for Large DatasetsMedium

Explain how to choose and optimize sorting approaches for large datasets based on memory, data distribution, and stability requirements.

ArraysSortingGreedyCohesity
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2
Machine Learning5 questions · ~41 min
Build a Predictive Model from DataMedium

Build a supervised model from a dataset, from feature prep through validation and deployment choices.

Cross-ValidationFeature EngineeringSupervised LearningCohesity
Handling Missing Data in MLMedium

Explain practical strategies for handling missing data and how to validate that the chosen approach improves model performance.

Feature EngineeringData WranglingSupervised LearningCohesity
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3
Statistics & Probability3 questions · ~25 min
Hypothesis Testing in Applied ScienceMedium

Tests statistical reasoning and ability to design evidence-based experiments.

Hypothesis TestingStatistical SignificanceP-ValuesCohesity
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4
Behavioral & Leadership5 questions · ~41 min
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5
More topics4 questions · ~33 min
Model Performance EvaluationHard

Explain how to select metrics, validate predictions, and analyze errors when evaluating a machine learning model.

model performanceevaluation metricsPrecisionCohesity
End-to-End ML ProjectHard

Tests ability to deliver applied ML from data to production in a real product context.

Feature StoreFeature DriftModel ServingCohesity
Monitor Model Performance Over TimeMedium

Approach for continuously monitoring a deployed model and keeping performance stable as data changes.

CalibrationAccuracyThreshold TuningCohesity
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