A top investment bank is in the process of building a new Forex trading platform. To ensure high availability and scalability, you designed the trading platform to use an Elastic Load Balancer in front of an Auto Scaling group of On-Demand EC2 instances across multiple Availability Zones. For its database tier, you chose to use a single Amazon Aurora instance to take advantage of its distributed, fault-tolerant, and self-healing storage system. In the event of system failure on the primary database instance, what happens to Amazon Aurora during the failove

Following are the solution to the given question:

Explanation:

Initially, Aurora will try and establish a new DB instance in the same AZ as the previous example. When Aurora can do it, he will try to create a new DB instance in another AZ.

Aurora will try and construct a new DB instance in the same disponibility zone as the original example if there is not an Amazon Aurora Replica (i.e. single instance) that does not execute Aurora Serverless. The replacement of the original example was better managed and may not work if there is, for example, an issue that impacts broadly the entire Access Service.

The best answer to this question is B according to e2020 guys and gals (: