Exam AWS Certified Solutions Architect - Professional SAP-C02 topic 1 question 164 discussion

launch config is replaced by launch template hence is not advisible, option A rulled out. C is wrong because launch template cannot be updated. D is also wrong for the same reason

As an alternative to manually specifying the instance types, you can specify the attributes that an instance must have, and Amazon EC2 will identify all the instance types with those attributes. This is known as attribute-based instance type selection. For example, you can specify the minimum and maximum number of vCPUs required for your instances, and EC2 Fleet will launch the instances using any available instance types that meet those vCPU requirements.

Correct answer: B

Option B

Option B

When you use attribute-based instance type selection, you allow AWS to diversify the instances across different instance types within a specified instance family or similar characteristics. This helps in reducing the risk of Spot Instance termination due to capacity issues or price fluctuations.

B Amazon EC2 Auto Scaling can select from a wide range of instance types for launching Spot Instances. This meets the Spot best practice of being flexible about instance types, which gives the Amazon EC2 Spot service a better chance of finding and allocating your required amount of compute capacity.

key word "spot instance launch failure"-> attribute based selection

its a b

b-b-b-b-bb-b- Creating a new launch template version allows for making changes to the template without disrupting the existing instances. Using attribute-based instance type selection enables the Auto Scaling group to automatically select the most suitable instance type based on the defined attributes, such as availability zone, instance family, or instance size. By leveraging attribute-based instance type selection, the Auto Scaling group can adapt to changing Spot Instance availability and launch instances in zones with higher availability, reducing launch failures. Updating the launch template with this new version ensures that new instances launched by the Auto Scaling group utilize the improved instance selection process, thereby enhancing reliability.

B. Create a new launch template version that uses attribute-based instance type selection.

https://docs.aws.amazon.com/autoscaling/ec2/userguide/create-asg-instance-type-requirements.html#use-attribute-based-instance-type-selection-prerequisites

Confused between B and D , will choose B

b is correct https://aws.amazon.com/blogs/aws/new-attribute-based-instance-type-selection-for-ec2-auto-scaling-and-ec2-fleet/

B is correct