AWS Certified Solutions Architect Associate SAA-C03 Practice Question
A company's application is deployed across multiple EC2 instances in an Auto Scaling group behind an Application Load Balancer. The company requires minimal downtime, even in the event of an Availability Zone outage. Which disaster recovery strategy would BEST ensure that the application remains available?
Implement a Backup and Restore strategy with daily backups.
Configure a Pilot Light environment in another region.
Use an Active-Active deployment across two different cloud service providers.
Extend the Auto Scaling group to multiple Availability Zones within the same region.
Using a Multi-AZ deployment strategy for the Auto Scaling group would ensure that if one Availability Zone becomes unavailable, the other zones can continue to operate, thereby providing high availability. Incorrect answers involve strategies which either do not provide immediate failover (Backup and Restore, Pilot Light) or are not practical for the scenario described (Active-Active deployment is not a strategy but a configuration).
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What is an Auto Scaling group in AWS?
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What are Availability Zones and why are they important?
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Can you explain what high availability means in the context of AWS?