Your question is Depth of Application Security. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about a time you handled application security work at a deep, expert level, even when the role was not explicitly AppSec-focused.
Describe one specific hands-on example rather than giving general security principles. Explain the system, your personal contribution, the threat model, the controls you implemented, and how you verified that the controls reduced risk. Include measurable outcomes, difficult trade-offs, collaboration with engineering or operations, and what you would improve in hindsight.