Xero Data Scientist Interview Questions
The questions to prepare for a Xero Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Calculate per-user engagement totals and active days over inclusive rolling 30-day windows using PostgreSQL window functions.
XeroFind the second-highest distinct transaction amount using a subquery in PostgreSQL without LIMIT.
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NPCIUse LEFT JOINs and COUNT DISTINCT to count games with under 10 hours of playtime for each console.
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NateraExplain hypothesis testing and choose between parametric and non-parametric methods based on assumptions, measurement scales, and sample characteristics.
XeroExplain statistical power and why low-power product experiments can miss real effects and lead to weak decisions.
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Identify major online experimentation pitfalls and explain practical mitigations for SRM, network effects, peeking, and novelty.
XeroBuild a classifier for a highly imbalanced dataset and choose training and evaluation methods that surface rare positives.
XeroApproach for identifying, prioritizing, and launching a new feature that increases user engagement.
XeroTests your ability to build diagnostic analytics and drive investigation from signals to causes.
XeroTests your ability to write maintainable Python for transforming nested JSON data.
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