Afiniti Data Scientist Interview Questions
The questions to prepare for a Afiniti Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Compute the probability that two fair six-sided dice add up to 9 by counting favorable outcomes over total outcomes.
Tests probability modeling skills for combinatorial scenarios.
Explain how to handle NULLs, skewed values, and outliers when preparing an analysis dataset using SQL.
Explain INNER, LEFT, RIGHT, FULL OUTER, CROSS, and SELF JOINs with examples and when to use each.
Find the second-highest distinct employee salary using PostgreSQL DISTINCT, filtering, and descending order.
Use salary ordering and row numbering to return employees ranked 4th through 11th by lowest salary.
Use DENSE_RANK and a department join to find employees earning the fourth-lowest distinct salary.
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Explain how feature engineering improves supervised model performance and how to validate its impact with proper evaluation.
Explain precision vs recall and when business context should push you to optimize one metric over the other.
Assesses product awareness and ability to connect ML work to business context.
Assesses understanding of A/B testing risks and how to avoid misleading results.