Welcome to your interview.
The question is on your right: Safe Updates in Blockchain Systems. 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.
What are the risks of deploying updates in a blockchain-based environment, and how do you mitigate them?