How would you answer an interview scenario involving Azure Key Vault in Microsoft Azure?

For an interview scenario involving Azure Key Vault, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. Azure Key Vault stores secrets, keys, and certificates securely. For production, use managed identities, least-privilege RBAC, separate vaults by environment, secret rotation, logging, and private networking where needed. 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.