How would you answer an interview scenario involving Azure Service Bus in Microsoft Azure?

For an interview scenario involving Azure Service Bus, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. Azure Service Bus is an enterprise message broker offering queues, topics, subscriptions, sessions, and dead-lettering. In this scenario, for an order workflow with billing and notifications, explain queue versus topic design, retries, duplicate handling, dead-letter processing, and message contract evolution. For production, design consumers to be idempotent, configure lock duration and retries, monitor dead-letter queues, use sessions only when ordering is required, and keep message contracts versionable. I would then explain the main alternatives and tradeoffs, identify likely failure modes, and describe how I would validate the solution through testing, observability, security controls, and recovery or rollback planning.