Dataford
Top 21
Prep plan
Updated weekly · Last refresh Aug 30

Moz Data Scientist Interview Questions

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

21questions
~3htotal time
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1
Machine LearningStart here. 8 questions · ~64 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 TradeoffMoz
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2
Metrics3 questions · ~24 min
Analyze Dataset for FindingsMedium

Tests structured exploratory analysis and how you translate insights into a clear narrative.

KPIsData WranglingDiagnosisMoz
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3
Pipelines3 questions · ~24 min
Build ETL for Large-Scale ModelingHard

Tests ETL design, data quality, scalability, and how you prepare data for ML.

SchedulingETLBatch ProcessingMoz
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4
More topics7 questions · ~56 min
Use A/B Testing for Product FeaturesMedium

Tests ability to design experiments, choose metrics, and interpret results correctly.

Confidence IntervalsStatistical SignificanceA/B TestingMoz
Evaluate Classification Model PerformanceEasy

Tests selection of appropriate classification metrics and validation practices.

PrecisionAccuracyRecallMoz
Recommendation System for New ProductMedium

Tests product-oriented ML design, modeling choices, and evaluation approach for recommendations.

User NeedsMVPUse CasesMoz
Handling Missing DataEasy

Tests practical data cleaning decisions and impact on downstream analysis quality.

Data WranglingCase WhenAggregationsMoz
Microservices vs MonolithMedium

Assesses understanding of system architecture trade-offs relevant to data science platforms.

architecturemicroservicesMoz
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Rolling 30-Day Active UsersHard
Practice
Practice drill

Calculate daily rolling 30-day active users from a BCG event log using CTEs, date intervals, and distinct aggregation.

Window FunctionsDate FunctionsRunning TotalsAnthropicAtlassianThe Boston Consulting Group
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Analyze Decision Impact by RegionEasy
Practice
Practice drill

Use joins, CASE WHEN, and date filtering to compare outcome rates before and after a decision.

Data WranglingDiagnosisAggregationsHarbourVest Partners
The finish line: interview-readyComplete all 21 questions plus 3 hands-on drills to finish this plan.