Top 29
Prep plan
Updated weekly · Last refresh Aug 30

Cohere Data Scientist Interview Questions

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

29questions
~4htotal time
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1
SQL & Data ManipulationStart here. 5 questions + 1 drill · ~54 min
Average Order Value Per CustomerEasy
Practice

Use GROUP BY and AVG to calculate each Zappos Family customer's average order value.

Data WranglingGroup ByAggregationsCohere
7-Day Rolling Active UsersMedium
Practice

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.

Window FunctionsDate FunctionsRunning TotalsCohere
Analyze Decision Impact by RegionEasy
Practice
Practice drill

Use joins, CASE WHEN, and date filtering to compare outcome rates before and after a decision.

Data WranglingDiagnosisAggregationsHarbourVest Partners
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2
A/B Testing & Experimentation4 questions · ~35 min
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchCohere
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3
Machine Learning4 questions · ~35 min
Implement Transformer AttentionHard

Evaluates your ability to implement transformer attention and reason about correctness.

Cohere
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4
Statistics & Probability4 questions · ~35 min
Ensuring Statistical SignificanceMedium

Assesses your grasp of hypothesis testing, error rates, and experiment design assumptions.

Data AnalysisStatistical SignificanceCohere
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5
Product Sense4 questions · ~35 min
Framework to Diagnose Usage DropMedium

Assesses structured troubleshooting for product usage regressions using data and instrumentation.

root cause analysisDiagnosisCohere
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6
Behavioral & Leadership6 questions · ~53 min
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7
More topics2 questions · ~18 min
Investigate User Engagement DeclineMedium

Investigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.

RetentionDiagnosisEngagement MetricsCohere
Intrinsic Evaluation for HellaSwagHard

Evaluates your approach to intrinsic evaluation for language model benchmarks like HellaSwag.

Language ModelsCohere
The finish line: interview-readyComplete all 29 questions plus 1 hands-on drill to finish this plan.