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OA, Data Challenge, and a Four-Round Power Day

Capital OneData Scientist · Onsite · Oct 2025

At the end of July, a friend referred me for a Capital One SDA position. Then nothing for about a month. 9/5: The recruiter emailed with the OA, valid for one week. The OA wasn't hard but the time was tight — 70 minutes for 15 questions, 14 multiple choice and 1 SQL. The first seven questions used one CSV, the eighth was the SQL question, and the last seven used four more CSVs where you had to me…

Shared by a candidate · reported Oct 2025. Interview formats change; use it as a guide, not a script.