Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 46 discussion

If answer C confuses you, know that RDS is a managed service and AWS handles the scaling part. You don't get to choose an ASG.

B will work for this use case in my opinion.

B is true answer here

Multi-AZ mainly for high availability which is not the concern in this question. This question asking about scalability therefore, Read Replica is a valid option. https://aws.amazon.com/rds/features/read-replicas/ To add read-replicas into auto-scaling group, search "Add replica auto scaling" in https://aws.amazon.com/getting-started/hands-on/aurora-autoscaling-with-readreplicas/

Agreed with B

I would be go for B

Once you see high availability, think Application load balancer, Autoscaling group and multi-AZ

B is the correct answer

B is right

Explanation: You can create a read replica as a Multi-AZ DB instance. Amazon RDS creates a standby of your replica in another Availability Zone for failover support for the replica. Creating your read replica as a Multi-AZ DB instance is independent of whether the source database is a Multi-AZ DB instance. CORRECT: "Create a Multi-AZ RDS Read Replica of the production RDS DB instance" is the correct answer. INCORRECT: "Create a Single-AZ RDS Read Replica of the production RDS DB instance. Create a second Single-AZ RDS Read Replica from the replica" is incorrect. Read replicas are primarily used for horizontal scaling. The best solution for high availability is to use a Multi-AZ read replica. INCORRECT: "Create a cross-region Multi-AZ deployment and create a read replica in the second region" is incorrect as you cannot create a cross- region Multi-AZ deployment with RDS. INCORRECT: "Use Amazon Data Lifecycle Manager to automatically create and manage snapshots" is incorrect as using snapshots is not the best solution for high availability.

B. Create a Multi-AZ RDS Read Replica of the production RDS DB instance.

With Multi-AZ, the replication is SYNCHRONOUS, but for Read-Replica, the replication is ASYNCHRONOUS. So, now the replication is SYNCHRONOUS or ASYNCHRONOUS for Multi-AZ Read Replica?

Answer B. HA => Multi AZ. Performance => Read Replica

B for sure. Multi AZ for high availability

Option A is wrong as hourly snapshots help provide backup and not reduce load Option C is wrong as RDS does not support Auto Scaling for Read Replicas. Option D is wrong as Single AZ Read Replica does not provide High Availability. B it is

it's B

Ans = B