Pelmorex Data Scientist Interview Questions
The questions to prepare for a Pelmorex Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Calculate total completed session duration per user and return the top three users in PostgreSQL.
Calculate a three-day moving average of active-client revenue using aggregation and SQL window functions.
Identify purchased products with the highest non-null discount in each category, including ties.
Starbucks
MeeshoIdentify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
Evaluates experimental design choices for measuring impact of push notifications.
A framework for prioritizing AI product features based on user value, feasibility, evaluation quality, and trade-offs.
Investigate a 15% engagement decline by decomposing the metric, isolating root causes, and proposing actions.
Assesses rigor in statistical assumptions, testing, and interpretation of results.
Assesses structured root-cause analysis for engagement metric declines.
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