Which command add existing resources into Terraform state?

1. A. Terraform init
2. B. Terraform plan
3. C. Terraform refresh
4. D. Terraform import
5. E. All of these

Correct Answer: D
This is the command that can add existing resources into Terraform state, by matching them with the corresponding configuration blocks in your files.

You want to know from which paths Terraform is loading providers referenced in your Terraform configuration (* files). You need to enable additional logging messages to find this out. Which of the following would achieve this?

1. A. Set verbose for each provider in your Terraform configuration
2. B. Set the environment variable TF_LOG_TRACE
3. C. Set the environment variable TF_LOG_PATH
4. D. Set the environment variable TF_log_TRACE

Correct Answer: B
This will enable additional logging messages to find out from which paths Terraform is loading providers referenced in your Terraform configuration files, as it will set the log level to TRACE, which is the most verbose and detailed level.

Changing the Terraform backend from the default "local" backend to a different one after performing your first terrafom apply is:

1. A. Optional
2. B. Impossible
3. C. Mandatory
4. D. Discouraged

Correct Answer: D
Changing the Terraform backend after performing the initial terraform apply is technically possible but strongly discouraged. This is because changing backends can lead to complexities in state management, requiring manual intervention such as state migration to ensure consistency. Terraform's documentation and best practices advise planning the backend configuration carefully before applying Terraform configurations to avoid such changes.References = This guidance is consistent with Terraform's official documentation, which recommends careful consideration and planning of backend configurations to avoid the need for changes.

How would you reference the "name???? value of the second instance of this resource?

1. A. aws_instance.web(2),name
2. B. element(aws_instance.web, 2)
3. C. aws_instance-web(1)
4. D. aws_instance_web(1),name
5. E. Aws_instance,web,* , name

Correct Answer: D
In Terraform, when you use the count meta-argument, you can reference individual instances using an index. The indexing starts at 0, so to reference the "name" value of the second instance, you would use aws_instance.web[1].name. This syntax allows you to access the properties of specific instances in a list generated by the count argument.
References:
✑ Terraform documentation on count and accessing resource instances: Terraform Count

Why would you use the -replace flag for terraform apply?

1. A. You want Terraform to ignore a resource on the next apply
2. B. You want Terraform to destroy all the infrastructure in your workspace
3. C. You want to force Terraform to destroy a resource on the next apply
4. D. You want to force Terraform to destroy and recreate a resource on the next apply

Correct Answer: D
The -replace flag is used with the terraform apply command when there is a need to explicitly force Terraform to destroy and then recreate a specific resource during the next apply. This can be necessary in situations where a simple update is insufficient or when a resource must be re-provisioned to pick up certain changes.