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Gappify Interview Questions

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

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1
ExecutionStart here. 5 questions · ~42 min
Roadmap With Competing PrioritiesHard

Build and execute an engineering roadmap when product, reliability, and platform priorities compete for the same team capacity.

RoadmappingScope ManagementPrioritizationGappify
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2
Metrics4 questions · ~34 min
Investigate User Engagement DeclineMedium

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

RetentionDiagnosisEngagement MetricsGappify
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3
A/B Testing & Experimentation3 questions · ~25 min
Handle Peeking in Customer ExperimentsHard

Decide how to analyze an experiment when results are checked repeatedly and multiple comparisons may inflate false positives.

PeekingExperimentationStatistical SignificanceGappify
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4
Sales & Customer5 questions · ~42 min
Mock Discovery Call for Pain PointsMedium

Tests discovery skills, questioning, and translating accounting pain into a compelling sales narrative.

Pain PointsGappify
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5
System Design5 questions · ~42 min
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6
Coding3 questions · ~25 min
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7
More topics25 questions · ~211 min
Compare Signup Cohorts by RetentionHard
Practice

Use CTEs, joins, and date logic to compare 30-day activity rates across monthly signup cohorts.

Window FunctionsDate FunctionsCTEsGappify
Pivoting Strategy From Customer SignalsMedium

Describe how you used market or customer data to change course, and how you made the new strategy credible and measurable.

EstimationCompetitive AnalysisGrowth StrategyGappify
Testing Engagement Change for NoiseMedium

Decide whether a change in user engagement is statistically real using hypothesis testing and confidence intervals.

Confidence IntervalsHypothesis TestingStatistical SignificanceGappify
Using Customer Feedback to ImproveMedium

Assesses your customer-driven iteration process and impact on product outcomes.

customer feedbackproduct improvementuser experienceGappify
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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
Compare User Retention by CohortHard
Practice
Practice drill

Use CTEs, joins, and month-based aggregation to calculate cohort retention over time from signup and activity data.

Window FunctionsDate FunctionsCTEsWorkdayAmazon Development Center U.S.The Sparks Foundation
Detect Post-Launch Customer Behavior ShiftsMedium
Practice
Practice drill

Use CTEs, joins, and conditional aggregation to compare customer orders before and after a product launch.

Window FunctionsDate FunctionsCTEsQuoraMotiveIntuit
The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.