A software company recently migrated one of its applications to the AWS platform. The application is deployed in region ap-southeast-1. For the disaster recovery strategy, the DevOps team has used a warm-standby solution and created another functional environment in region ap-southeast-2. When there is a failure of the production system and a failover is required, which steps can be regarded as appropriate recovery steps? (Select TWO.)

Answer options:

A.Create custom AMIs and start the application in Amazon EC2 instances.
B.Adjust Auto Scaling groups to accommodate the increased traffic.
C.Use EBS Lifecycle Manager to create EBS snapshots regularly.
D.Select tools to backup data into AWS S3. Enable encryption for sensitive data.
E.Check Amazon Route 53 to make sure that all traffic is routed to region ap-southeast-2.

Correct Answer – B, E
Refer to https://aws.amazon.com/blogs/aws/new-whitepaper-use-aws-for-disaster-recovery/ for the AWS disaster recovery blueprint. It should be noted that the warm standby solution is an extension to the pilot light. The standby is fully functional. However, the environment uses a minimum size of servers to save cost.
Option A is incorrect: Because for warm standby, AMI should be already in place, and EC2 instances are already launched.
Option B is CORRECT: Because warm standby usually uses a smaller number of instances so adjusting ASG will be needed in these scenarios.
Option C is incorrect: Because this belongs to the Backup & Restore disaster recovery strategy.
Option D is incorrect: Because this is one step of Backup & Restore.
Option E is CORRECT: Because in Route 53, the DNS records may need to be changed manually or a health check has been configured to help failover automatically. This is a key step to ensure the site is recovered properly.
 How to use Route53 health check for DNS failover: https://aws.amazon.com/premiumsupport/knowledge-center/route-53-dns-health-checks/
Other DR documents : https://aws.amazon.com/blogs/startups/large-scale-disaster-recovery-using-aws-regions/