Your question is Uptime During Major Migration. 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).
What is your strategy for maintaining system uptime during a major version migration?
Explain how you would plan the migration, coordinate stakeholders, validate system health, and respond if the rollout causes service degradation. Address deployment sequencing, monitoring, rollback criteria, and communication.