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Updated weekly · Last refresh Sep 22
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Just Eat Takeaway Data Scientist Interview Questions

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

21questions
~3htotal time
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1
MetricsStart here. 3 questions · ~25 min
First Checks for Metric DropsEasy

Outline the first checks to diagnose a sudden drop in a core product metric, starting with data quality, scope, and decomposition.

Lagging IndicatorsLeading IndicatorsDiagnosisJJust Eat Takeaway
Designing a User Retention MetricMedium

Evaluates ability to define retention metrics that reflect user behavior accurately.

user retentionJJust Eat Takeaway
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2
A/B Testing & Experimentation6 questions · ~49 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 TestingJJust Eat Takeaway
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3
Product Sense4 questions · ~33 min
Restaurant Recommendation Success MetricMedium

Evaluates ability to define success metrics for Just Eat Takeaway recommendation outcomes.

JJust Eat Takeaway
Delivery Speed vs Delivery Cost Trade-offsMedium

Assesses product and modeling trade-off thinking for delivery operations at Just Eat Takeaway.

Trade-offsdelivery speedJJust Eat Takeaway
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4
Behavioral & Leadership5 questions · ~41 min
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5
More topics3 questions · ~25 min
Testing Engagement Change for NoiseMedium

Decide whether a change in user engagement is statistically real using hypothesis testing and confidence intervals.

Confidence IntervalsHypothesis TestingStatistical SignificanceJJust Eat Takeaway
RANK vs DENSE_RANK in LeaderboardsEasy

Explain how RANK() and DENSE_RANK() handle ties differently in ordered SQL results such as leaderboards.

Window FunctionsRankingData WranglingJJust Eat Takeaway
Handling Missing and Dirty SQL DataMedium

Explain how to profile, clean, and standardize missing or dirty data before analysis.

Data WranglingCase WhenQualityJJust Eat Takeaway

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
SQL: Deduplicate Latest RecordsMedium
Practice
Practice drill

Deduplicate customer records with ROW_NUMBER, retaining the latest record and reporting duplicate counts.

Window Functionsdata cleaningRankingIBMNewWave Telecom & Technologies
Remove Duplicates Keeping LatestMedium
Practice
Practice drill

Delete duplicate contact records while retaining the most recently updated row for each email address.

Window Functionsdata cleaningRankingBNSF RailwayRevature
Top Credit Score Applicants by StateMedium
Practice
Practice drill

Identify the highest-credit-score 5% of applicants within each state using percentiles and window ranking.

Window FunctionsJoinsRankingAmerican Credit Acceptance
The finish line: interview-readyComplete all 21 questions plus 3 hands-on drills to finish this plan.