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AWS Solutions Architect – Associate
Question 7 of 10
DESIGN RESILIENT ARCHITECTURES
A stateless web application must remain available if one Availability Zone fails. Which architecture best meets this requirement?
A · One larger EC2 instance in a single Availability Zone
B · An Auto Scaling group across multiple Availability Zones behind an Application Load Balancer
C · Multiple EC2 instances in one Availability Zone with nightly snapshots
D · One EC2 instance with two attached EBS volumes
Correct. This is the most resilient design.
Distributing instances across Availability Zones removes a single-zone failure point, while the load balancer routes traffic to healthy instances.
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