1 answer published. Last candidate submission on Jun 15 2026, 12:32pm PDT. Interview question asked to Data Scientists interviewing at Peloton, Yandex, Airbnb and other companies. Original question asked: What’s the hardest data problem you’ve tackled?. Question last reported by a candidate interviewing at Adyen for a Data Scientist interview on Jul 6 2026, 6:46am PDT.