Welcome to your interview.
The question is on your right: Describe a Successful Project. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
You are discussing a project you personally led end to end and consider successful. The interviewer wants to understand how you defined success, aligned stakeholders, drove execution, and handled trade-offs rather than just the final outcome.
Can you provide an example of a successful project you led?