Chapter 12: Common Use-Case Scenarios

1. C. The five pillars of the Well-Architected Framework are reliability, performance efficiency, security, cost optimization, and operational excellence. Resiliency is not one of them.

2. A, D. Security is about protecting the confidentiality, integrity, and availability of data. Granting each AWS user their own IAM username and password makes it possible to ensure the confidentiality of data. Enabling S3 versioning protects the integrity of data by maintaining a backup of an object. Deleting an empty S3 bucket doesn’t help with any of these. It’s not possible to create a security group rule that denies access to unused ports since security groups deny any traffic that’s not explicitly allowed.

3. C, D. Preventing the accidental termination of an EC2 instance in the Auto Scaling group can avoid overburdening and causing performance issues on the remaining instance, especially during busy times. Using CloudFront can help improve...