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Updated weekly · Last refresh Oct 6

United Nations Data Scientist Interview Questions

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

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1
Product SenseStart here. 5 questions · ~40 min
Prioritize With Limited ResourcesMedium

Framework for deciding what to build first when resources are constrained and trade-offs are unavoidable.

Feature PrioritizationUser NeedsMVPUnited Nations
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2
Machine Learning5 questions · ~40 min
Handling Class Imbalance in ClassificationMedium

Explain practical ways to train and evaluate a classifier when the target classes are highly imbalanced.

model trainingSupervised LearningClass ImbalanceUnited Nations
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3
Pipelines19 questions · ~152 min
Data Quality in ML PipelinesMedium

Approach for maintaining high quality data across ML pipelines, from ingestion through feature generation and model consumption.

Data QualityInfrastructureData WranglingUnited Nations
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4
Statistics & Probability6 questions · ~48 min
Visualizing Literacy and GrowthMedium

Tests communication of statistical relationships to non-technical audiences.

RegressionCorrelationData WranglingUnited Nations
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5
More topics7 questions · ~56 min
Evaluate Model Deployment ReadinessMedium

Framework for deciding if a model is ready for deployment using discrimination, calibration, threshold choice, and business impact.

CalibrationAccuracyThreshold TuningUnited Nations
Use SQL for Data ExtractionEasy

Tests SQL proficiency for building analysis-ready datasets from operational or partner data sources.

JoinsData WranglingAggregationsUnited Nations
Measure Dashboard or Data Product ImpactMedium

Tests ability to define metrics and evaluate whether analytics products drive real-world outcomes.

KPIsLeading IndicatorsDiagnosisUnited Nations
Applying NLP to UN ReportsMedium

Tests your approach to extracting insights from unstructured text in UN reporting contexts.

Text ClassificationTopic ModelingTokenizationUnited Nations
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL for Operational KPI TrackingHard
Practice
Practice drill

Aggregate United Nations regional KPIs across operational tables and calculate month-over-month percentage changes.

Window FunctionsLag/LeadJoinsUnited Nations
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
Cleaning a Messy DatasetMedium
Practice
Practice drill

Filter invalid game events and normalize event names using PostgreSQL string and null handling.

missing valuesdata cleaningnull handlingQuantiumScopelyCarvana
The finish line: interview-readyComplete all 42 questions plus 3 hands-on drills to finish this plan.