As part of a new project, you just created a regional Aurora MySQL cluster in ap-southeast-2 from the AWS console. There are several Aurora database replicas that ensure that the Aurora cluster is highly available and durable. About the Aurora database replicas, which statement is correct? (Select TWO.)

Answer options:

A.The replicas can share both the read and write traffic.
B.The replicas are located in different availability zones in the same region as the primary database which is ap-southeast-2.
C.By default, there is only one replica generated in each availability zone.
D.Aurora automatically fails over to an Aurora Replica if the primary DB instance becomes unavailable.
E.Replicas are configured with smaller storage volume than the primary DB instance to save cost.

Correct Answer – B, D
An Amazon Aurora DB cluster consists of primary DB instances and Aurora Replicas. Check the details in
https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.Overview.html.
Option A is incorrect: Because the replicas can only serve the read traffic.
Option B is CORRECT: Because the replicas spread in different availability zones to ensure that the database still works even if one availability zone has an outage.
Option C is incorrect: Because there is no such limitation, and each Aurora DB cluster can have up to 15 Aurora Replicas in addition to the primary DB instance.
Option D is CORRECT: This is a key feature of Aurora Replica.
Option E is incorrect: Because Aurora Replica is configured with the same storage volume as the primary DB instance, according to the above link.