Asked to find out whether you can hold responsibility without either collapsing or deflecting. The common failure is choosing a 'failure' that is secretly a success.
Write your answer in 150-250 words using situation, action, result and what changed afterwards. Choose something that actually went wrong and that you owned.
100 points, 60% to pass.
The interviewer is testing ownership and learning, not the size of the disaster. Answers that pick a disguised success ('I worked too hard') fail immediately. The strongest answers name the decision that was wrong, take responsibility without theatrical self-blame, and show a specific later behaviour that changed as a result.