SAP-C02 Question 83
Select 4A retail company runs an e-commerce platform on AWS. To meet business continuity requirements, they have a Recovery Time Objective (RTO) of 2 hours and a Recovery Point Objective (RPO) of 15 minutes. Their architecture includes EC2 instances in a single Availability Zone, an RDS database with automated backups enabled, and S3 for storing product images. Which combination of actions should the company take to meet their RTO and RPO requirements in case of a disaster?
- A
Enable multi-AZ deployment for the RDS database.
- B
Set up cross-region replication for the S3 bucket storing product images.
- C
Use EC2 Auto Scaling groups across multiple Availability Zones.
- D
Increase the frequency of RDS automated backups to every 15 minutes.
- E
Implement a warm standby architecture in a secondary region.
Show answer and explanation
Correct answers: A, B, C, E
Explanation
To meet the RTO of 2 hours and RPO of 15 minutes, the company needs to ensure fault tolerance, high availability, and replication of critical data. Multi-AZ for RDS and cross-region replication for S3 ensure data durability and availability within the RPO limits. Using EC2 Auto Scaling across multiple AZs and implementing a warm standby architecture in a secondary region address the RTO by reducing the time required to recover the application and infrastructure during a disaster. Increasing the frequency of RDS backups alone is insufficient to meet the RPO because backups are not real-time and restoration could exceed the 15-minute window.
- A. Correct.
Enabling multi-AZ deployment for the RDS database ensures high availability and quick failover in case of an Availability Zone failure, helping meet the 2-hour RTO.
- B. Correct.
Setting up cross-region replication for S3 ensures that the product images are replicated almost in real-time to another region, helping meet the 15-minute RPO.
- C. Correct.
Using EC2 Auto Scaling groups across multiple Availability Zones provides fault tolerance and ensures that instances can quickly spin up in a different zone, reducing downtime.
- D. Incorrect.
Increasing the frequency of RDS automated backups does not directly meet the RPO requirement because automated backups are not continuous and restoring from a backup could take longer than 15 minutes.
- E. Correct.
Implementing a warm standby architecture in a secondary region ensures that critical resources are already running in another region, enabling a faster restoration of services and meeting the RTO requirement.