Be honest about what you got wrong, not just external factors. Show how the failure changed your approach going forward.
The best answers show genuine accountability, not blaming others. Look for: what signals they missed, how they identified the failure, what they did about it (pivot, sunset, iterate), and specific lessons applied to future work. Candidates who claim no failures lack self-awareness.
Crucial question. Ability to fail, learn, and iterate is core to product management. Red flag: blaming engineering, market timing, or stakeholders without self-reflection.