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Cowen Interview Questions

The questions to prepare for Cowen interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
StrategyStart here. 6 questions · ~49 min
2
Metrics7 questions · ~57 min
Critical Metrics for Product LaunchMedium

Choose the most important launch metrics, balancing early signals, long-term outcomes, and a clear KPI hierarchy.

KPIsConversion RateLeading IndicatorsCowen
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3
Coding5 questions · ~41 min
Programming Languages and RationaleEasy

Tests your technical fit and your ability to justify language choices based on constraints.

MathArraysStringsCowen
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4
Statistics & Probability6 questions · ~49 min
A/B Testing for Product FeaturesMedium

Explain how to design and evaluate an A/B test for a product feature, including metrics, MDE, sample size, and guardrails.

Hypothesis TestingStatistical SignificanceA/B TestingCowen
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5
Product Sense5 questions · ~41 min
Decide on Feature LaunchMedium

Framework for deciding whether a new customer-facing feature should launch, based on user value, priorities, success criteria, and trade-offs.

Feature PrioritizationUser NeedsMVPCowen
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6
Execution5 questions · ~41 min
Build a Budgeting ModelEasy

Explain how you would create a financial model, align stakeholders on assumptions, and manage risks in the build process.

RoadmappingRisk AssessmentCowen
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7
More topics16 questions · ~131 min
SQL vs NoSQL DifferencesEasy

Tests understanding of database tradeoffs and when to choose each approach.

SubqueriesJoinsData WranglingCowen
Designing for High-Frequency TradingHard

Tests system design skills for low latency, throughput, and correctness in trading workflows.

Feature StoreModel ServingRecommendation SystemsCowen
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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 50 questions plus 3 hands-on drills to finish this plan.