21 Correct Answer: A

22 Correct Answer: A

23 Correct Answer: BD
Reference:
https://www.terraform.io/guides/core-workflow.html

24 Correct Answer: B
The terraform taint command manually marks a Terraform-managed resource as tainted, forcing it to be destroyed and recreated on the next apply.
Reference:
https://www.terraform.io/docs/cli/commands/taint.html

25 Correct Answer: B
Reference:
https://www.terraform.io/docs/extend/guides/v1-upgrade-guide.html