Exam 2 Review

Question 1

Where are TF plugins downloaded and stored on the server?

Answer 1

By default, terraform init downloads plugins into a subdirectory of the working directory, .terraform/providers so that each working directory is self-contained.

Question 2

Explicit dependencies in Terraform are dependencies that are explicitly declared in the Terraform configuration. These dependencies are used to control

Answer 2

the order in which Terraform creates, updates, and destroys resources.

Question 3

In Terraform, you can declare explicit dependencies using the depends_on argument in a resource block.

Explain how the depends_on argument works?

Answer 3

The depends_on argument takes a list of resource names and specifies that the resource block in which it is declared depends on those resources.

Question 4

What is the main benefit of using the depends_onargument?

Answer 4

By declaring explicit dependencies, you can ensure that Terraform creates resources in the correct order, so that dependent resources are available before other resources that depend on them.

Question 5

Terraform Cloud supports the following VCS providers as of February 2023:

Answer 5

GitHub
GitLab
BitBucket
Azure DevOps Server

Question 6

From the code below, identify the implicit dependency:

resource "aws_eip" "public_ip" {
    vpc = true
    instance = aws_instance.web_server.id
}
 
resource "aws_instance" "web_server" {
  ami           = "ami-2757f631"
  instance_type = "t2.micro"
  depends_on = [aws_s3_bucket.company_data]
}

Answer 6

The EC2 instance labeled web_server is the implicit dependency as the aws_eip cannot be created until the aws_instance labeled web_server has been provisioned and the id is available.

Note that aws_s3_bucket.company_data is an explicit dependency for the aws_instance.web_server

Question 7

In order to reduce the time it takes to provision resources, Terraform uses parallelism. By default, how many resources will Terraform provision concurrently during a terraform apply?

Answer 7

By default, Terraform will provision resources concurrently with a maximum of 10 concurrent resource operations.

Question 8

terraform apply - refresh-only - this command is used to

Answer 8

reconcile any changes to the real-world resources and update state to reflect those changes.