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Unknowns Interview Questions

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

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1
CodingStart here. 6 questions · ~66 min
2
SQL & Data Manipulation5 questions · ~55 min
Second Highest Trader SalaryEasy
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Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingUnknowns
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3
Pipelines5 questions · ~55 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityUnknowns
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4
Execution5 questions · ~55 min
Project Challenges and SolutionsEasy

Describe an embedded project challenge, how you mitigated risk, managed stakeholders, and made trade-offs to deliver.

Trade-offsRisk AssessmentScope ManagementUnknowns
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5
Statistics & Probability5 questions · ~55 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 TestingUnknowns
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6
Strategy5 questions · ~55 min
Tell Me About YourselfEasy

Craft a concise self-introduction that highlights fit, communication style, and relevance for an Account Executive role.

brand cultureBusiness AcumenCompetitive AnalysisUnknowns
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7
More topics19 questions · ~211 min
Using Metrics to Drive DecisionsEasy

Explain how you used a KPI and supporting metrics to diagnose a product issue and make a concrete product decision.

Funnel AnalysisKPIsLeading IndicatorsUnknowns
Approach User Research in DesignEasy

Explain a practical approach to user research in the design process, from understanding user needs to turning findings into design decisions.

Jobs to Be DoneUser ResearchUser NeedsUnknowns
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