Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 274 discussion

Guys, sorry but I don't really have time to deepdive as my exam is soon. Based on chatGPT and my previous study the answer should be B "Create Amazon Machine Images (AMIs) to back up the EC2 instances. Copy the AMIs to a secondary AWS Region. Automate infrastructure deployment in the secondary Region by using AWS CloudFormation," would likely be the most suitable solution for the given requirements. This option allows for the creation of Amazon Machine Images (AMIs) to back up the EC2 instances, which can then be copied to a secondary AWS region to provide disaster recovery capabilities. The infrastructure deployment in the secondary region can be automated using AWS CloudFormation, which can help to reduce the amount of time and resources needed for deployment and management.

Option B would be the most operationally efficient solution for implementing a DR solution for the application, meeting the requirement of an RTO of less than 4 hours and using the fewest possible AWS resources during normal operations. By creating Amazon Machine Images (AMIs) to back up the EC2 instances and copying them to a secondary AWS Region, the company can ensure that they have a reliable backup in the event of a disaster. By using AWS CloudFormation to automate infrastructure deployment in the secondary Region, the company can minimize the amount of time and effort required to set up the DR solution.

OPtion E : Automate infrastructure deployment in the secondary Region by using terraform and ditch AWS CloudFormation 😬🤪.

A is not "most operationally efficient" C and D do not meet the "use the fewest possible AWS resources during normal operations" requirement

Option D suggests launching EC2 instances in a secondary Availability Zone (AZ), but AZs are not separate AWS Regions. While it provides high availability within a Region, it doesn't offer geographic redundancy, which is essential for disaster recovery.

needs to use the fewest possible AWS resources during normal operations = backup & restore

Create Amazon Machine Images (AMIs) to back up the EC2 instances. Copy the AMIs to a secondary AWS Region. Automate infrastructure deployment in the secondary Region by using AWS CloudFormation

B SHOULD BE RIGHT

Option A: Add complexity and management overhead. Option B: Creating AMIs for backup and using AWS CloudFormation for infrastructure deployment in the secondary Region is a more streamlined and automated approach. CloudFormation allows you to define and provision resources in a declarative manner, making it easier to maintain and update your infrastructure. This solution is more operationally efficient compared to Option A. Option C: could be expensive and not fully aligned with the requirement of using the fewest possible AWS resources during normal operations. Option D: might not be sufficient for meeting the DR requirements, as Availability Zones are still within the same AWS Region and might be subject to the same regional-level failures.

Please I would really appreciate clarification with this question. The community has voted 100% that the right answer is B. However, option D is shown to be the correct answer. So, who sets the correct answer? Which one should new comers like myself believe? the community's or the other (which am guessing is set by the moderators???) Please help.

C may satisfy the requirement of using the fewest possible AWS resources during normal operations, it may not be the most operationally efficient or cost-effective solution in the long term.

So Weird , they have product for this > Elastic Disaster Recovery , but option is not given .

https://docs.aws.amazon.com/zh_cn/whitepapers/latest/disaster-recovery-workloads-on-aws/disaster-recovery-options-in-the-cloud.html#backup-and-restore

the answer should be B --->recovery time objective (RTO) of less than 4 hours. https://docs.aws.amazon.com/zh_cn/whitepapers/latest/disaster-recovery-workloads-on-aws/disaster-recovery-options-in-the-cloud.html#backup-and-restore