Faculty.ai Data Scientist Interview Questions
The questions to prepare for a Faculty.ai Data Scientist interview. Questions from real interview reports rank first. Updated daily.
Explain how NULL values affect JOIN results, when LEFT JOIN is safer, and how to handle NULLs correctly in PostgreSQL.
Count valid daily interactions and return the top three users using aggregation and deterministic ranking.
Calculate each user's seven-day rolling average of daily events using PostgreSQL window functions.
BounteousFFreelancerBBoston Tech IndiaCalculate each user's daily and cumulative Reddit comment count, including dates with no activity.
RedditUse a two-proportion z-test and power analysis to explain p-value and statistical power for an onboarding A/B test.
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Describe a machine learning project, from problem framing and feature work to model training and evaluation.
Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
Framework for choosing a feature's primary success metric and guardrails before launch.
Explain which classification metrics to use and how metric choice depends on the business objective and error tradeoffs.
Diagnose a post-release KPI drop by separating instrumentation issues from real behavior changes and tracing the problem through the metric hierarchy.
Tests core ML understanding of error decomposition and generalization.