You currently have an Autoscaling group that has the following settings.

Answer options:

A.Change the Instance type in the current launch configuration. Change the Desired value of the Autoscaling Group to 4. Ensure the new instances are launched.
B.Delete the current Launch configuration. Create a new launch configuration with the new instance type and add it to the Autoscaling Group. This will then launch the new instances.
C.Make a copy of the Launch configuration. Change the instance type in the new launch configuration. Attach that to the Autoscaling Group. Change the maximum and Desired size of the Autoscaling Group to 4. Once the new instances are launched, change the Desired and maximum size back to 2.
D.Change the desired and maximum size of the Autoscaling Group to 4. Make a copy of the Launch configuration. Change the instance type in the new launch configuration. Attach that to the Autoscaling Group. Change the maximum and Desired size of the Autoscaling Group to 2.

Answer – C
You should make a copy of the launch configuration, add the new instance type. The change the Autoscaling Group to include the new instance type. Then change the Desired number of the Autoscaling Group to 4 so that instances of new instance type can be launched. Once launched, change the desired size back to 2 so that Autoscaling will delete the instances with the older configuration. Note that the assumption here is that the current instances are equally distributed across multiple AZ’s because Autoscaling will first use the AZRebalance process to terminate instances.
Option A is invalid because you cannot make changes to an existing Launch configuration.
Option B is invalid because if you delete the existing launch configuration, your application will not be available. You need to ensure a smooth deployment process.
Option D is invalid because you should change the desired size to 4 after attaching the new launch configuration.
For more information on Changing the Launch Configuration for an Auto Scaling Group, please visit below AWS Docs:
https://docs.aws.amazon.com/autoscaling/ec2/userguide/change-launch-config.html
For more information on Autoscaling Suspend and Resume, please visit the below URL:
http://docs.aws.amazon.com/autoscaling/latest/userguide/as-suspend-resume-processes.html