An Application Running on Amazon EC2 Instances in an Auto

question 784

Multiple Choice

An application running on Amazon EC2 instances in an Auto Scaling group across multiple Availability Zones was deployed using an AWS CloudFormation template. The SysOps team has patched the Amazon Machine Image (AMI) version and must update all the EC2 instances to use the new AMI. How can the SysOps Administrator use CloudFormation to apply the new AMI while maintaining a minimum level of active instances to ensure service continuity?

• A) Run the aws cloudfomation update-stack command with the - rollback-configuration option Run the aws cloudfomation update-stack command with the - rollback-configuration option
• B) Update the CloudFormation template with the new AMI ID, then reboot the EC2 instances
• C) Deploy a second CloudFormation stack and use Amazon Route 53 to redirect traffic to the new stack
• D) Set an AutoScalingUpdate policy in the CloudFormation template to update the stack. Set an AutoScalingUpdate policy in the CloudFormation template to update the stack.

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Definitions:

Babinski Sign

A reflex indicated by upward movement of the big toe when the sole of the foot is stimulated, used to assess neurological function.

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Tongue Blade

A tool used in medical examinations to depress the tongue and allow for a better view of the throat and mouth.