AWS Certified SysOps Administrator – Associate (legacy) — Question 64

You have started a new job and are reviewing your company's infrastructure on AWS You notice one web application where they have an Elastic Load Balancer
(&B) in front of web instances in an Auto Scaling Group When you check the metrics for the ELB in CloudWatch you see four healthy instances in Availability Zone
(AZ) A and zero in AZ B There are zero unhealthy instances.
What do you need to fix to balance the instances across AZs?

Answer options

• A. Set the ELB to only be attached to another AZ
• B. Make sure Auto Scaling is configured to launch in both AZs
• C. Make sure your AMI is available in both AZs
• D. Make sure the maximum size of the Auto Scaling Group is greater than 4

Correct answer: B

Explanation

The correct answer is B because configuring Auto Scaling to launch instances in both AZs ensures that instances are balanced across the zones. Option A is incorrect as it limits the ELB to a single AZ, which does not address the distribution issue. Option C is not relevant in this context since the availability of the AMI does not impact the current instance distribution. Option D is also incorrect as increasing the maximum size does not directly result in a balanced distribution across AZs.