RELX Data Scientist Interview Questions
The questions to prepare for a RELX Data Scientist interview. Questions from real interview reports rank first. Updated weekly.
Calculate each active RpmGlobal Enterprise Planning user's 30-day rolling average of daily activity.
RELXExplain how INNER JOIN and LEFT JOIN differ in returned rows, NULL behavior, and performance considerations in PostgreSQL.
RELXIdentify likely duplicate ScienceDirect sessions using a self-join and conditional aggregation.
ElsevierUse ROW_NUMBER to return each student's second score on a specified Khan Academy exercise.
Khan AcademyIdentify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
RELXDesign an end-to-end A/B test for a pricing page, including MDE, guardrails, analysis plan, and a ship decision.
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Explain what a p-value means, how it relates to statistical significance, and how to describe it clearly to non-technical stakeholders.
RELXAssesses your awareness of false positives and error-rate control in experimentation.
RELXA framework for deciding which features should ship first when building a new product.
RELXDefine a success metric for a new feature that captures real user value, not just raw usage.
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