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WinZO Interview Questions

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

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1
CodingStart here. 12 questions · ~104 min
2
A/B Testing & Experimentation4 questions · ~35 min
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchWinZO
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3
Metrics4 questions · ~35 min
First Checks for Metric DropsEasy

Outline the first checks to diagnose a sudden drop in a core product metric, starting with data quality, scope, and decomposition.

Lagging IndicatorsLeading IndicatorsDiagnosisWinZO
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4
Product Sense11 questions · ~95 min
Define Metrics for New FeaturesMedium

Define a success metric for a new feature that captures real user value, not just raw usage.

MetricsFeature Prioritizationuser valueWinZO
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5
Execution6 questions · ~52 min
Prioritize Work With Limited CapacityMedium

Prioritize competing engineering requests when capacity is constrained and stakeholders want different outcomes.

Trade-offsScope ManagementPrioritizationWinZO
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6
Behavioral & Leadership3 questions · ~26 min
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7
More topics10 questions · ~87 min
Calculate 30-Day User RetentionHard
Practice

Use CTEs, joins, and date filtering to calculate 30-day retention by signup cohort from login and feature usage data.

Window FunctionsDate FunctionsAggregationsWinZO
Ensure Statistical SignificanceMedium

Tests your approach to achieving reliable inference in experiments.

experiment designStatistical SignificanceWinZO
App Problems and Market GuesstimateHard

Evaluates problem framing, analytical thinking, and estimation methodology under ambiguity.

guesstimationMarket SizingWinZO
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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.