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Datacamp Data Scientist Interview Questions

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

20questions
~3htotal time
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1
A/B Testing & ExperimentationStart here. 4 questions · ~32 min
Design Test for New FeatureMedium

Design an A/B test for a new platform feature, including success metrics, power, guardrails, and a clear ship decision.

experiment designfeature evaluationA/B TestingDDatacamp
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchDDatacamp
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2
Product Sense6 questions · ~48 min
Product Metric Reflecting Skill MasteryMedium

Tests metric design tied to user learning outcomes.

product metricsdesignDDatacamp
Evaluate Learning Path FeatureMedium

Assesses product impact and measurement strategy.

user experienceDDatacamp
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3
Behavioral & Leadership5 questions · ~40 min
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4
More topics5 questions · ~40 min
Diagnose Engagement DropHard

Identify the causes of a quarterly engagement decline through metric validation, decomposition, segmentation, and trend analysis.

MetricsDiagnosisuser engagementDDatacamp
Optimizing Large Transaction Table JoinsHard

Explain how to tune a slow PostgreSQL query that joins several large transaction tables using indexes, join strategy, and partitioning.

JoinsperformancesqlDDatacamp
Explain Backpropagation in Neural NetworksMedium

Evaluates understanding of neural network training mechanics.

Neural NetworksbackpropagationMachine LearningDDatacamp
Metric for A/B Test SignificanceMedium

Evaluates understanding of statistical metrics and how they connect to experiment outcomes.

Statistical SignificanceA/B TestingDDatacamp
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL Retention Over 90 DaysMedium
Practice
Practice drill

Write a SQL query to calculate the retention rate of users who engaged with a specific document category over the last 90 days at Scribd. Treat a user as r...

Date FunctionsJoinssqlScribd
Second Attempt Score Per UserEasy
Practice
Practice drill

Use ROW_NUMBER to return each student's second score on a specified Khan Academy exercise.

Data Analysissqluser engagementKhan Academy
Write a SQL QueryMedium
Practice
Practice drill

Summarize annual user engagement with a left join, aggregation, and NULL-safe duration handling.

null handlingJoinssql queryNBCUniversalCCourseraMeta Platforms
The finish line: interview-readyComplete all 20 questions plus 3 hands-on drills to finish this plan.