AWS Certified Solutions Architect – Associate (SAA-C03) — Question 246

A company recently migrated its web application to AWS by rehosting the application on Amazon EC2 instances in a single AWS Region. The company wants to redesign its application architecture to be highly available and fault tolerant. Traffic must reach all running EC2 instances randomly.

Which combination of steps should the company take to meet these requirements? (Choose two.)

Answer options

• A. Create an Amazon Route 53 failover routing policy.
• B. Create an Amazon Route 53 weighted routing policy.
• C. Create an Amazon Route 53 multivalue answer routing policy.
• D. Launch three EC2 instances: two instances in one Availability Zone and one instance in another Availability Zone.
• E. Launch four EC2 instances: two instances in one Availability Zone and two instances in another Availability Zone.

Correct answer: C, E

Explanation

The correct answer is C and E because using an Amazon Route 53 multivalue answer routing policy allows for random distribution of traffic across multiple EC2 instances, enhancing availability. Additionally, launching four EC2 instances across two Availability Zones provides redundancy and fault tolerance, ensuring that if one zone fails, the application can still operate from the other zone. Options A and B do not meet the requirement for random traffic distribution, and D does not provide enough instances for high availability.