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Mercari Interview Questions

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

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1
ExecutionStart here. 5 questions · ~41 min
Balancing Speed Quality and ScopeHard

Describe a time you had to choose between speed, quality, and scope, and how you aligned stakeholders around the trade-off.

Trade-offsRisk AssessmentScope ManagementMercari
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2
Product Sense5 questions · ~41 min
Balance User Needs and GoalsMedium

Explain how you balanced user needs with business goals in a product decision, including trade-offs and outcomes.

Feature PrioritizationUser NeedsValue PropositionMercari
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3
Pipelines4 questions · ~32 min
Scaling Data Pipelines EffectivelyMedium

Approach for building data pipelines that scale in throughput, reliability, and operational visibility.

InfrastructureETLMercari
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4
Machine Learning5 questions · ~41 min
Handle Imbalanced Classification DataMedium

Build a classifier for a highly imbalanced dataset and choose metrics, sampling, and thresholds that fit the minority class.

Cross-ValidationFeature EngineeringSupervised LearningMercari
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5
Statistics & Probability4 questions · ~32 min
Statistical vs Practical SignificanceMedium

Explain why a statistically significant experiment result may still be too small to matter for product or business decisions.

Confidence IntervalsExperimentationHypothesis TestingMercari
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6
Model Evaluation4 questions · ~32 min
Discuss Model Evaluation TechniquesMedium

Explain your approach to model evaluation, including how you choose and interpret metrics for different ML problems.

PrecisionAccuracyRecallMercari
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7
More topics23 questions · ~187 min
Tell Me About YourselfEasy

Tests your ability to deliver a clear, relevant introduction tailored to the role at Aqr.

Competitive AnalysisGo-to-MarketMercari
Marketplace Health Metrics FrameworkEasy

Define a practical metric framework for tracking growth, marketplace balance, operations, and profitability in a marketplace business.

KPIsDiagnosisLTVMercari
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Daily Session Funnel Conversion RatesHard
Practice
Practice drill

Calculate daily session-level funnel conversion rates using CTEs, CASE WHEN, and date functions.

User NeedsData WranglingAggregations
Conversion Rate Per CityMedium
Practice
Practice drill

Calculate Practo booking conversion by city using a LEFT JOIN, COUNT DISTINCT, and percentage aggregation.

Conversion RateData Analysissql queriesPracto
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
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