Correct Answer: BE

Terraform supports both HashiCorp Configuration Language (HCL) and JSON formats for configurations. https://www.terraform.io/docs/configuration/

Correct Answer: BC

Correct Answer: B

The terraform plan command creates an execution plan, which lets you preview the changes that Terraform plans to make to your infrastructure. The plan command alone will not actually carry out the proposed changes, and so you can use this command to check whether the proposed changes match what you expected before you apply the changes or share your changes with your team for broader review. Source: https://www.terraform.io/cli/commands/plan

Correct Answer: D

Implicit and Explicit Dependencies

By studying the resource attributes used in interpolation expressions, Terraform can automatically infer when one resource depends on another. In the example above, the reference to aws_instance.web_server.id creates an implicit

dependency on the aws_instance named web_server.

Terraform uses this dependency information to determine the correct order in which to create the different resources.

# Example of Implicit Dependency

resource "aws_instance" "web_server" {

ami = "ami-b374d5a5"

instance_type = "t2.micro"

}

resource "aws_eip" "web_server_ip" {

vpc = true

instance = aws_instance.web_server.id

}

In the example above, Terraform knows that the aws_instance must be created before the aws_eip.

Implicit dependencies via interpolation expressions are the primary way to inform Terraform about these relationships, and should be used whenever possible. Sometimes there are dependencies between resources that are not visible to

Terraform. The depends_on argument is accepted by any resource and accepts a list of resources to create explicit dependencies for. For example, perhaps an application we will run on our EC2 instance expects to use a specific Amazon S3

bucket, but that dependency is configured inside the application code and thus not visible to Terraform. In that case, we can use depends_on to explicitly declare the dependency:

# Example of Explicit Dependency

# New resource for the S3 bucket our application will use.

resource "aws_s3_bucket" "example" {

bucket = "terraform-getting-started-guide"

acl = "private"

}

# Change the aws_instance we declared earlier to now include "depends_on" resource "aws_instance" "example" {

ami = "ami-2757f631"

instance_type = "t2.micro"

# Tells Terraform that this EC2 instance must be created only after the # S3 bucket has been created.

depends_on = [aws_s3_bucket.example]

}

https://learn.hashicorp.com/terraform/getting-started/dependencies.html

Correct Answer: B

In a parent module, outputs of child modules are available in expressions as module..

.

For example, if a child module named web_server declared an output named instance_ip_address, you could access that value as module.web_server.instance_ip_address.