Exam AWS Certified SysOps Administrator - Associate topic 1 question 210 discussion

The ans can either be A or B since failover routing policy is necessary. I resolve to A because Cname cannot resolve domain/apex name only alias can achive that

Hint: Alias record gets associated with ALB so def. option A!..

C C. Store the data in S3 Standard for the first 90 days. Set up an S3 Lifecycle rule to move the data to S3 Glacier Flexible Retrieval after 90 days. Explanation: First 90 Days: S3 Standard provides high availability and low latency, which meets the requirement of providing access to the data in milliseconds during the first 90 days when the data is infrequently accessed but must remain highly available. After 90 Days: S3 Glacier Flexible Retrieval is a cost-effective storage class designed for long-term data archiving with retrieval times typically within a few hours, meeting the requirement of retrieval time under 5 hours. This option provides a significant cost saving compared to S3 Standard while still ensuring that data can be retrieved relatively quickly.

A Route 53 failover routing

Alias allow duplicate record name which is the case here

To configure automatic failover to the secondary Region for an application that is deployed to two AWS Regions in an active-passive configuration, the following steps should be taken: Configure Route 53 alias records that point to each ALB in the two Regions. Choose a failover routing policy, such as Failover or Geolocation. Set Evaluate Target Health to Yes to ensure that Route 53 only responds to DNS queries with healthy ALB endpoints.

Active / Standby = one region active at a time. Health checks and Route53.