Growth

Answer "what is your greatest weakness" by naming one real, non-fatal weakness, then spending most of your time on the concrete steps you are taking to fix it and the evidence it is working. Skip the humble-brag ("I'm a perfectionist"). The interviewer is testing self-awareness, not looking for flaws.

Answer "tell me about a time you failed" with a real failure you owned: what went wrong, your honest role in it, what you did to recover, and the specific lesson that changed how you work. Pick a genuine miss - not a disguised humble-brag - and spend most of your answer on what you learned and applied.