A Company Has a Mission-Critical Application on AWS That Uses

question 247

Multiple Choice

A company has a mission-critical application on AWS that uses automatic scaling. The company wants the deployment lifecycle to meet the following parameters: • The application must be deployed one instance at a time to ensure the remaining fleet continues to serve traffic. • The application is CPU intensive and must be closely monitored. • The deployment must automatically roll back if the CPU utilization of the deployment instance exceeds 85%. Which solution will meet these requirements?

• A) Use AWS CloudFormation to create an AWS Step Functions state machine and Auto Scaling lifecycle hooks to move to one instance at a time into a wait state. Use AWS Systems Manager automation to deploy the update to each instance and move it back into the Auto Scaling group using the heartbeat timeout.
• B) Use AWS CodeDeploy with Amazon EC2 Auto Scaling. Configure an alarm tied to the CPU utilization metric. Use the CodeDeployDefault.OneAtAtime configuration as a deployment strategy. Configure automatic rollbacks within the deployment group to roll back the deployment if the alarm thresholds are breached.
• C) Use AWS Elastic Beanstalk for load balancing and AWS Auto Scaling. Configure an alarm tied to the CPU utilization metric. Configure rolling deployments with a fixed batch size of one instance. Enable enhanced health to monitor the status of the deployment and roll back based on the alarm previously created.
• D) Use AWS Systems Manager to perform a blue/green deployment with Amazon EC2 Auto Scaling. Configure an alarm tied to the CPU utilization metric. Deploy updates one at a time. Configure automatic rollbacks within the Auto Scaling group to roll back the deployment if the alarm thresholds are breached.

---

Definitions:

Sensory Information

Data that is collected by the senses (sight, hearing, taste, touch, and smell) and sent to the brain for processing.

Electrical Signal

A form of signal in which electric current or voltage represents the information being transmitted.

Neuron

A neuron is a nerve cell that is the basic building block of the nervous system, involved in the transmission of electrical impulses.

Agonist

A chemical or drug that binds to receptors in the brain and causes a biological response.