Whatnot Interview Questions

Almost everything reported from Whatnot happens in a single round: 24 of these 26 questions came from a technical screen, with one take-home project and no onsite reports at all. That screen covers more ground than its name suggests. Coding accounts for 9 questions and stays practical, computing the dot product of two vectors and then redoing it when the vectors are sparse, working through adjacent-deletion and sorted-square array problems, or debugging someone else's Python aggregation loop built out of dictionaries and lists. Another 7 are system design, framed around the product itself, such as direct messaging for an e-commerce marketplace. The 7 Data Scientist reports bring experimentation questions of the two-sided kind: whether a discovery boost genuinely helped sellers, or simply moved attention around the feed. Behavioural time is short and tends to be about why this product and what transfers from your last job. 19 questions are medium with 3 easy and 3 hard, so the bar is reachable rather than punishing. Just over half, 56%, can be read without premium; 11 questions open a console and 14 include a written answer.