How would you answer an interview scenario involving Amazon S3 in AWS?

For an interview scenario involving Amazon S3, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. Amazon S3 is durable object storage for files, backups, logs, static assets, and data lakes. In this scenario, for storing user-uploaded documents, explain bucket layout, IAM, encryption, presigned URLs, malware scanning flow, lifecycle policies, and cross-region recovery. For production, block public access unless explicitly required, use IAM roles, enable encryption and versioning where appropriate, apply lifecycle rules, and use presigned URLs for controlled client access. 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.