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GrubMarket Interview Questions

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

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1
Machine LearningStart here. 6 questions · ~49 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffGrubMarket
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2
Metrics6 questions · ~49 min
Measure Marketing Campaign SuccessEasy

Define campaign success using business KPIs, funnel conversion, acquisition cost, and leading indicators tied to outcomes.

Funnel AnalysisKPIsLeading IndicatorsGrubMarket
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3
Execution12 questions · ~98 min
Describe a Challenging ProjectEasy

Share a challenging project, your role, the risks and trade-offs you managed, and the final outcome.

Trade-offsRoadmappingRisk AssessmentGrubMarket
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4
Strategy4 questions · ~33 min
Develop a New Market GTM StrategyEasy

Approach for building a go-to-market strategy for a new market or solution.

Competitive AnalysisGo-to-MarketGrowth StrategyGrubMarket
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5
A/B Testing & Experimentation3 questions · ~24 min
Power Analysis for Survey ExperimentHard

Determine sample size and power for a customer survey or experiment, including MDE, guardrails, and a disciplined decision rule.

MDEPower AnalysisSample SizeGrubMarket
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6
Statistics & Probability3 questions · ~24 min
Choosing a Significance TestEasy

Explain how to choose an appropriate significance test based on metric type, study design, and the null hypothesis.

Confidence IntervalsHypothesis TestingStatistical SignificanceGrubMarket
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7
More topics15 questions · ~122 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityGrubMarket
Align Team on Goals and CustomersMedium

How to keep a team aligned to product goals while staying close to customer needs.

Stakeholder ManagementUser NeedsProduct VisionGrubMarket
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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
Identify Funnel Bottlenecks in OnboardingHard
Practice
Practice drill

Use joins, CTEs, and aggregations to find the weakest step in an onboarding funnel and estimate lost conversions.

Funnel AnalysissqlDiagnosisAtlassianRevolut
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
The finish line: interview-readyComplete all 49 questions plus 3 hands-on drills to finish this plan.