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Fuku Interview Questions

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

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1
CodingStart here. 5 questions · ~45 min
Merge Overlapping Time IntervalsMedium
Practice

Merge overlapping intervals by sorting on start time, then scanning once to combine intersecting ranges.

time complexityAlgorithmsperformance analysisFuku
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2
Product Sense3 questions · ~27 min
Turn Research Into RequirementsMedium

Explain how you run user research and convert feedback into clear, prioritized product requirements.

User Researchfeedback incorporationproduct requirementsFuku
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3
Execution5 questions · ~45 min
Migrate Monolith to MicroservicesHard

Plan a zero-downtime migration from a legacy monolith to microservices while managing risk, sequencing, and stakeholder pressure.

Trade-offsRoadmappingRisk AssessmentFuku
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4
Pipelines8 questions · ~72 min
Build Idempotent Payment API PipelineEasy

Design an idempotent payment API and ETL pipeline that prevents duplicate charges during retries while publishing exactly-once payment events downstream.

InfrastructureIdempotencyQualityFuku
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5
Generative AI & LLMs3 questions · ~27 min
Debugging Unexpected LLM OutputMedium

Tests your debugging approach for LLM behavior, root-cause analysis, and corrective actions.

DebuggingllmFuku
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6
System Design5 questions · ~45 min
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7
More topics21 questions · ~190 min
Metrics for New Product LaunchMedium

Choose a metric hierarchy for a new product launch that covers adoption, customer value, and financial performance.

KPIsLeading IndicatorsDiagnosisFuku
When to Switch to Fine-TuningMedium

Tests your ability to make data-driven decisions about when fine-tuning is worth the cost.

Decision MakingPrompt EngineeringFine-TuningFuku
Evaluating AI Feature SuccessMedium

Tests your ability to define measurable outcomes and evaluation plans for AI features in production.

feature evaluationsuccess metricsFuku
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