Task 2.2: Design Highly Available And/or Fault-Tolerant Architectures SAA-C03 Practice Questions (Page 8)

Questions 36–40

1. 36application · medium

   A company runs a stateless web application on a fleet of Amazon EC2 instances in an Auto Scaling group. The application is deployed using a custom AMI. The operations team has noticed that some instances have drifted from the standard configuration due to manual SSH access and ad-hoc changes. The company wants to ensure that all instances are identical and that any failed instance is replaced with a known-good configuration. What should a solutions architect recommend?

   • AUse AWS Systems Manager to run a script on a schedule that reverts any configuration changes on the instances.
   • BImplement an immutable infrastructure pattern by baking the application configuration into the AMI and using a launch template that always deploys from the latest AMI.
   • CUse AWS Config rules to detect configuration drift and send an alert to the operations team.
   • DDisable SSH access to the instances by removing the key pair from the launch template.
   Reveal Solution Discussion Select an answer first
2. 37foundation · easy

   Which design practice helps mitigate a single point of failure in a web application?

   • ADeploying multiple application instances across multiple Availability Zones
   • BUsing a single large EC2 instance
   • CStoring all data in a single EBS volume
   • DUsing a single NAT gateway
   Reveal Solution Discussion Select an answer first
4. 38foundation · easy

   What is the core principle of immutable infrastructure?

   • AServers are only accessible through a bastion host
   • BServers are updated in place with configuration management tools
   • CServers are never modified after deployment; they are replaced with new ones
   • DServers are kept running indefinitely without updates
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5. 39foundation · easy

   What should you do if your application is being throttled by an AWS service?

   • AChange the AWS Region
   • BImplement exponential backoff and retry logic
   • CDisable the service
   • DIncrease the instance size
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6. 40foundation · easy

   How does immutable infrastructure improve recoverability?

   • ABy making it easier to recreate a known-good state
   • BBy using multiple Availability Zones
   • CBy storing all data on persistent volumes
   • DBy automatically backing up all changes
   Reveal Solution Discussion Select an answer first