If a resource in the root module references an output from a child module, what does Terraform do?

It creates both in parallel because there is no explicit dependency.

It creates the root resource first, then the module resources.

It creates the module resources first, then the root resource.

It fails because you cannot reference module outputs in the root module.

How does Terraform determine the order in which resources are created or destroyed?

By the dependency graph built from references between resources and modules

By the order resources are defined in the state file

By the order they appear in the configuration files

By the alphabetical order of resource names

A module creates an AWS security group and outputs its ID. A separate resource in the root configuration creates an EC2 instance that uses this security group ID. The developer writes the following code: resource "aws_instance" "web" { ami = "ami-123456" instance_type = "t2.micro" vpc_security_group_ids = [module.sg.security_group_id] } What will happen when Terraform applies this configuration?

The security group module will be created before the EC2 instance.

Both resources will be created in parallel.

The EC2 instance will be created before the security group module.

Terraform will fail because the output reference is invalid.

HashiCorp Certified:Terraform Authoring and Operations Professional

Domain 4Objective 2

4b TERRAFORM-AUTHORING-AND-OPERATIONS-PROFESSIONAL Practice Questions (Page 2)

Part of the Create, maintain, and use Terraform modules domain, which makes up ~13% of our current practice bank. HashiCorp does not publish an official question count, but from its 240-minute exam (~95–160 total, ~12–21 in this domain), expect 3–5 from this objective — we provide 16 practice questions to prepare you well beyond it. (estimate)

16questions here

4free pages

5concepts

Questions 6–10

6foundation · easy
If a resource in the root module references an output from a child module, what does Terraform do?
Select an answer first
7foundation · easy
How does Terraform determine the order in which resources are created or destroyed?
Select an answer first
8foundation · easy
How do you reference an output named `vpc_id` from a module block named `network`?
Select an answer first
9foundation · easy
In a Terraform configuration, which argument inside a module block specifies where Terraform should download the module code from?
Select an answer first
10application · medium
A module creates an AWS security group and outputs its ID. A separate resource in the root configuration creates an EC2 instance that uses this security group ID. The developer writes the following code: resource "aws_instance" "web" { ami = "ami-123456" instance_type = "t2.micro" vpc_security_group_ids = [module.sg.security_group_id] } What will happen when Terraform applies this configuration?
Select an answer first

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4b TERRAFORM-AUTHORING-AND-OPERATIONS-PROFESSIONAL Practice Questions (Page 2)

Questions 6–10

If a resource in the root module references an output from a child module, what does Terraform do?

How does Terraform determine the order in which resources are created or destroyed?

How do you reference an output named `vpc_id` from a module block named `network`?

In a Terraform configuration, which argument inside a module block specifies where Terraform should download the module code from?

Keep studying — Create, maintain, and use Terraform modules