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Prep plan
Updated weekly · Last refresh Aug 30

Airwallex Data Scientist Interview Questions

The questions to prepare for a Airwallex Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

36questions
~5htotal time
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1
SQL & Data ManipulationStart here. 5 questions + 2 drills · ~63 min
2
Statistics & Probability5 questions · ~43 min
Statistical vs Practical SignificanceMedium

Explain why a statistically significant experiment result may still be too small to matter for product or business decisions.

Confidence IntervalsExperimentationHypothesis TestingAirwallex
Statistical Significance and Confidence IntervalsEasy

Explain how statistical significance and confidence intervals are interpreted in a product experiment.

Confidence IntervalsHypothesis TestingStatistical SignificanceAirwallex
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3
Machine Learning4 questions · ~34 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 TradeoffAirwallex
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4
Metrics4 questions · ~34 min
Analyze Campaign Metrics That MatterEasy

Explain how you evaluated a marketing campaign using funnel, efficiency, and business outcome metrics.

KPIsLeading IndicatorsDiagnosisAirwallex
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5
A/B Testing & Experimentation4 questions · ~34 min
Diagnose Sample Ratio Mismatch TestMedium

Design an onboarding A/B test with explicit SRM detection, power analysis, guardrails, and a decision rule for whether results are valid.

ExperimentationStatistical SignificanceSample Ratio MismatchAirwallex
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6
Behavioral & Leadership10 questions · ~86 min
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7
More topics4 questions · ~34 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 valueAirwallex
Design Real-Time Sensor Event PipelineHard

Design a real-time pipeline for sensor events that transforms data and feeds a UI with low latency.

Stream ProcessingOrchestrationDependenciesAirwallex
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The finish line: interview-readyComplete all 36 questions plus 2 hands-on drills to finish this plan.