Reply Data Scientist Interview Questions
The questions to prepare for a Reply Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Calculate each user's 7-day rolling transaction average and daily spend rank using PostgreSQL window functions.
ReplyFind the second highest salary in each department without using aggregate functions.
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Cisco Restaurant + BarCalculate client-level rolling 7-day engagement and rank clients within each Gartner segment.
GartnerDefine a framework to measure whether a new observability dashboard feature is delivering real value and sustained adoption.
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Define the primary metric, guardrails, and power for a customer-facing A/B test before deciding whether to ship.
ReplyTests core ML understanding and ability to explain concepts accurately.
ReplyAssesses understanding of when Bayesian methods are preferable in hypothesis testing.
ReplyInvestigate why a key KPI moved the wrong way after a product change and separate signal from noise.
ReplyEvaluates your deep understanding of Transformer mechanics and LLM training workflows.
ReplyTests your ability to align evaluation metrics and thresholds with business costs and risk.
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