Reddit Data Scientist Interview Questions
The questions to prepare for a Reddit Data Scientist interview. Questions from real interview reports rank first. Updated weekly.
Use CTEs, joins, and date filtering to calculate 30-day retention by signup cohort from login and feature usage data.
RedditCompute median post scores per active Reddit community using a CTE, join, filtering, and percentile_cont.
RedditUse CTEs, aggregation, and a window function to find last week's top advertiser and its daily revenue.
RedditInvestigate why a key KPI moved the wrong way after a product change and separate signal from noise.
RedditSign up to see every question
Create a free account to unlock this list and practice real interview questions.
Explain statistical significance in experiments and how p-values and confidence intervals guide interpretation.
RedditTests product sense and metric design for balancing engagement and experience on Reddit.
RedditDesign a feed-ranking A/B test with explicit power, guardrails, and a mitigation plan for peeking, SRM, novelty, and network interference.
RedditTests NLP preprocessing and frequency extraction from user text similar to Reddit content.
RedditAssesses foundational machine learning knowledge relevant to the Data Scientist role.
Reddit