AWS Certified Solutions Architect – Associate (SAA-C03) — Question 980

A solutions architect is designing a disaster recovery (DR) strategy to provide Amazon EC2 capacity in a failover AWS Region. Business requirements state that the DR strategy must meet capacity in the failover Region.

Which solution will meet these requirements?

Answer options

• A. Purchase On-Demand Instances in the failover Region.
• B. Purchase an EC2 Savings Plan in the failover Region.
• C. Purchase regional Reserved Instances in the failover Region.
• D. Purchase a Capacity Reservation in the failover Region.

Correct answer: D

Explanation

On-Demand Capacity Reservations guarantee that Amazon EC2 capacity is reserved in a specific Availability Zone, ensuring the resources are available during a failover event. Regional Reserved Instances and Savings Plans provide billing discounts but do not offer capacity guarantees. On-Demand Instances are subject to real-time availability and do not guarantee capacity when needed during a disaster.