Exam AWS Certified Solutions Architect - Associate SAA-C03 topic 1 question 281 discussion

A: By using Multi-AZ deployment, the company can achieve an RPO of less than 1 second because the standby instance is always in sync with the primary instance, ensuring that data changes are continuously replicated.

Read Replicas: Read Replicas are asynchronous and support read scalability. It is uese to improve performance. Read Replicas can be in the same region or in a different region for disaster recovery purposes, but this involves manual intervention, which means Read Replicas do not provide automatic failover and requires DNS updates and application changes Multi-AZ: Multi-AZ maintains a synchronous standby replica of the primary instance in a different Availability Zone within the same region. Multi-AZ deployments provide high availability and automatic failover. Option A is better choice with respect to below statement, "the company sets a standard that requires a recovery point objective (RPO) of less than 1 second for all its production databases."

Solução Detalhada: Configure o grupo de segurança do EC2 com uma regra de entrada para permitir conexões apenas do grupo de segurança do ALB. A AWS permite essa associação dinâmica, o que garante que apenas o tráfego legítimo roteado pelo ALB possa chegar às instâncias. Essa é uma prática recomendada e atende ao objetivo de restringir o acesso às instâncias do EC2.

Correct answer is A

Same question old from SAA-C02 08.2021 https://www.examtopics.com/discussions/amazon/view/61072-exam-aws-certified-solutions-architect-associate-saa-c02/

C. Configure the DB instance in one Availability Zone, and create multiple read replicas in a separate Availability Zone. Here's why: Read Replicas: By configuring read replicas in a separate Availability Zone, you can leverage asynchronous replication to replicate data from the primary DB instance to the read replicas with minimal latency. This setup allows for near real-time data replication and can help achieve a low RPO. In contrast, Multi-AZ deployments (Option A) provide high availability by maintaining a standby replica but may not guarantee an RPO of less than 1 second due to synchronous replication and failover considerations. Options B and D are not directly related to achieving a low RPO for the databases.

I'm unsure with A, because the term RPO is not only applied to datacenter outages. Say, an application error corrupts the database, or an administrator accidentally overwrites all records. With answer A, Multi-AZ, these changes would be instantly copied to the replica. Only reason why A might still be correct is that the other answers don't make much more sense. B has nothing to do with RPO at all C could lose more than 1 second since read replicas are asynchronous D could be part of a solution but the CDC ask alone won't help

option A doesn't provide Data integrity only achieved in Option D using CDC.

Used for DR. Every single change is replicated in a standby AZ. If we lose the main AZ, (uses the same DNS name) standby becomes automatic failover and the new main DB.

Answer is A High availability = Multi AZ

My vote is A

Agree with A

Multi-AZ is a synchronous communication with the Master in "real time" and fail over will be almost instant.

correct is A

A should be correct

should be A

Correct Answer is A