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Updated weekly · Last refresh Aug 30

ZoomInfo Data Scientist Interview Questions

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

50questions
~7htotal time
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1
MetricsStart here. 6 questions · ~49 min
Measure Marketing Campaign SuccessEasy

Define campaign success using business KPIs, funnel conversion, acquisition cost, and leading indicators tied to outcomes.

Funnel AnalysisKPIsLeading IndicatorsZoomInfo
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2
Model Evaluation7 questions · ~58 min
Evaluate Regression with RMSE and MAEEasy

Explain how to evaluate a regression model with RMSE and MAE, and how to interpret the tradeoff between average and large errors.

RegressionMAERMSEZoomInfo
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3
Pipelines7 questions · ~58 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 WranglingZoomInfo
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4
Machine Learning7 questions · ~58 min
Tune Model HyperparametersMedium

Choose hyperparameters for a supervised model using cross-validation and regularization tradeoffs.

Hyperparameter TuningCross-ValidationRegularizationZoomInfo
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5
NLP6 questions · ~49 min
Classify Customer Feedback SentimentMedium

Build a sentiment classifier for customer feedback using modern text preprocessing and transformer fine-tuning.

Text ClassificationSentiment AnalysisTokenizationZoomInfo
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6
Product Sense4 questions · ~33 min
Prioritize Features for a New ProductMedium

A framework for deciding which features should ship first when building a new product.

Feature PrioritizationUser Needsproduct developmentZoomInfo
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7
More topics13 questions · ~107 min
Power Analysis for Experiment PlanningMedium

Reason about power analysis when planning an experiment and choosing sample size.

ExperimentationPower AnalysisSample SizeZoomInfo
Compare Periods with LAG and LEADMedium

Explain how LAG and LEAD compare current rows to previous or next periods in time-series SQL analysis.

Window FunctionsLag/LeadDate FunctionsZoomInfo
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Top Products by Sales RevenueEasy
Practice
Practice drill

Find the top 10 products by total sales revenue using joins, aggregation, and a CTE.

RankingGroup ByAggregationsRTXiSmile TechnologiesCatalina
Compare Campaign Performance PeriodsMedium
Practice
Practice drill

Use CASE WHEN and GROUP BY to compare Rippling Spend campaign metrics before and after launch.

Date FunctionsCase WhenAggregationsZoomInfoRipplingQuora
Monthly Conversion Rate by ChannelMedium
Practice
Practice drill

Calculate monthly channel conversion rates using date_trunc, conditional aggregation, a CTE, and a channel dimension join.

Date FunctionsGroup ByAggregationsZoomInfo
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.