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Updated weekly · Last refresh Oct 17

Alibaba Group Data Scientist Interview Questions

The questions to prepare for a Alibaba Group Data Scientist interview. Questions from real interview reports rank first. Updated daily.

33questions
~4htotal time
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1
Machine LearningStart here. 7 questions · ~57 min
Detect Rare Payment FraudMedium

Build an imbalanced binary classifier for payment fraud detection using cost-sensitive learning, threshold tuning, and precision-recall evaluation.

Cross-ValidationFeature EngineeringSupervised LearningAlibaba Group
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2
A/B Testing & Experimentation3 questions · ~24 min
Primary vs Guardrail Metric ChoiceMedium

Choose a primary success metric and guardrails for a game experiment, then explain how that choice drives power, analysis, and ship decisions.

ExperimentationGuardrail MetricsA/B TestingAlibaba Group
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3
SQL & Data Manipulation4 questions + 3 drills · ~62 min
SQL Window FunctionsMedium

Evaluates SQL proficiency with window functions and practical use cases.

Window FunctionssqlAlibaba Group
Rank Merchants by Daily SalesMedium
Practice
Practice drill

Rank merchants within each product category and day by aggregated sales volume using PostgreSQL window functions.

Window FunctionsData ManipulationRankingAlibaba Group
Top Categories SQL With Edge CasesMedium
Practice
Practice drill

Find daily top-performing product categories, preserving ties and treating null category or revenue values safely.

Date Functionsnull handlingRankingAlibaba Group
Top Purchasing Categories QueryMedium
Practice
Practice drill

Write a SQL query to find the top three purchasing categories for users who registered in the last thirty days at Alibaba Group. Use completed purchases w...

Date FunctionsJoinssqlAlibaba Group
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4
Behavioral & Leadership11 questions · ~89 min
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5
More topics8 questions · ~65 min
Explain Transformer Self-AttentionHard

Explain how transformer self-attention works, including its role in sequence modeling and why it scales better than RNNs.

Neural NetworksLanguage ModelsDeep LearningAlibaba Group
Interpreting P Values in TestingEasy

Explain what a p-value means in hypothesis testing and how it relates to statistical significance.

Hypothesis TestingStatistical SignificanceP-ValuesAlibaba Group
Diagnose KPI Drop After ReleaseMedium

Diagnose a post-release KPI drop by separating instrumentation issues from real behavior changes and tracing the problem through the metric hierarchy.

KPILeading IndicatorsDiagnosisAlibaba Group
E-commerce Product Metrics DesignMedium

Tests product sense and your ability to define measurable, reliable metrics for launches.

Metricsuser valueProduct VisionAlibaba Group
Project Walkthrough and ArchitectureMedium

Tests your ability to explain end-to-end ML/data project design choices and tradeoffs.

Decision Makingtechnical experienceAlibaba Group
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The finish line: interview-readyComplete all 33 questions plus 3 hands-on drills to finish this plan.