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B Lab Global Interview Questions

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

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~7htotal time
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1
SQL & Data ManipulationStart here. 3 questions + 2 drills · ~47 min
2
Coding7 questions · ~62 min
Reverse a String in PythonEasy
Practice

Reverse a string in Python using character traversal and return the reversed result.

StringsfunctionspythonB Lab Global
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3
Pipelines6 questions · ~53 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityB Lab Global
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4
Execution9 questions · ~80 min
Plan a Phased Operations RolloutMedium

Plan a phased rollout for a new operational initiative with clear stages, success criteria, and risk controls.

Launch Planningphased rolloutsProject ManagementB Lab Global
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5
Metrics8 questions · ~71 min
Critical Metrics for Product LaunchMedium

Choose the most important launch metrics, balancing early signals, long-term outcomes, and a clear KPI hierarchy.

KPIsConversion RateLeading IndicatorsB Lab Global
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6
Strategy7 questions · ~62 min
Analyze a New Product CategoryHard

Approach for analyzing whether a new product category is worth entering and how to size and frame the opportunity.

Competitive AnalysisGrowth StrategyMarket SizingB Lab Global
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7
More topics10 questions · ~89 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 MismatchB Lab Global
Build a User Feedback ProcessEasy

A structured approach for gathering user feedback, synthesizing it, and turning it into product decisions.

User ResearchUser NeedsPain PointsB Lab Global
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.