Most interview prep focuses on rehearsing answers to common questions: 'Tell me about yourself,' 'What's your greatest weakness,' 'Why do you want this role?' But experienced interviewers use these as setups — the real evaluation happens in the follow-up.
When you give a polished answer about leading a project, the interviewer probes: 'What was the biggest disagreement on that team, and how did you handle it?' or 'If you could redo that project, what would you change?'
These follow-ups test whether your initial answer was genuine experience or rehearsed talking points. 90% of candidates stumble here because they only prepared the surface-level answers.