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

For an interview scenario involving Amazon VPC, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. Amazon VPC provides isolated virtual networking for AWS workloads. In this scenario, for an internet-facing API with private application and database tiers, explain subnet layout, ALB, NAT gateways, route tables, security groups, and database isolation. For production, separate public and private subnets across availability zones, minimize public exposure, use security groups as primary workload firewalls, add VPC endpoints for private AWS service access, and document routing and DNS. 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.