You are writing a CloudFormation template to configure multiple AWS resources including an application load balancer. You need to launch the load balancer in two availability zones that have more free IP resources. How would you configure the load balancer in the CloudFormation template?

Answer options:

A.Specify two subnets IDs that belong to two availability zones in the template.
B.Specify the availability zone names in the template such as ap-southeast-2a and ap-southeast-2b.
C.Use the availability zone IDs in the template such as apse2-az1 and apse2-az2.
D.No actions required as CloudFormation automatically selects two availability zones that have more resources for the load balancer.

Correct Answer – A
Option A is CORRECT: Because you need to use Subnets or SubnetMappings for the application load balancer resources in CloudFormation. Subnets from at least two availability zones must be specified for application load balancers.
Option B is incorrect: Availability zone names should not be used in this scenario.
Option C is incorrect: Because you should use Subnets or SubnetMappings rather than the availability zone IDs.
Option D is incorrect: Because you must specify either Subnets or SubnetMappings for application load balancer resources.
Reference:
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-elasticloadbalancingv2-loadbalancer.html