EDF Data Scientist Interview Questions
The questions to prepare for a EDF Data Scientist interview. Questions from real interview reports rank first. Updated weekly.
Explain how to test whether an observed experiment lift is real using hypothesis testing, p-values, and confidence intervals.
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Explain common online experimentation pitfalls and how to design, analyze, and decide in ways that avoid false wins.
EDFTests SQL window function mastery for time-based aggregations and customer-level metrics.
EDFRank the top 3 completed rides per vehicle per day using joins, a CTE, and ROW_NUMBER.
WaymoUse ROW_NUMBER() to keep the earliest created_at 'Repl created' per entity and return out-of-order duplicates to delete.
Replit
QuantcastCompute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.
Gain Digital
TCS
Zest AIBuild a sentiment classifier for customer feedback using modern text preprocessing and transformer fine-tuning.
EDFOutline the first checks to diagnose a sudden drop in a core product metric, starting with data quality, scope, and decomposition.
EDFTests system design for forecasting, including data sources, modeling choices, and deployment considerations.
EDFTests ability to choose appropriate evaluation metrics for different modeling goals.
EDF