Output declaration syntax in Terraform - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of an output declaration in Terraform?

An output declaration in Terraform shows important information after applying the configuration, like IP addresses or resource IDs, so you can use or see them easily.

beginner

Basic syntax of a Terraform output declaration?

Use the keyword output followed by a name without quotes, then a block with value = and the expression to output.<br>Example:<br>

output "example" {
  value = aws_instance.myserver.id
}

intermediate

Can Terraform outputs have descriptions? Why use them?

Yes, outputs can have a description field to explain what the output means. This helps others understand the purpose of the output when reading the Terraform plan or state.

intermediate

How do you mark an output as sensitive in Terraform?

Add sensitive = true inside the output block to hide the output value from normal display, protecting secrets or private data.

beginner

What happens if you omit the value in an output declaration?

Terraform requires the value field in an output block. Omitting it causes an error because Terraform doesn't know what to show as output.

Which keyword starts an output declaration in Terraform?

A resource

B output

C variable

D provider

The output keyword is used to declare outputs in Terraform.

How do you hide sensitive output values in Terraform?

A Set <code>private = true</code>

B Use <code>hidden = true</code>

C Add <code>sensitive = true</code> inside the output block

D Outputs cannot be hidden

Setting sensitive = true hides the output value from normal display.

What must every Terraform output block include?

A A <code>value</code> field

B A <code>description</code> field

C A <code>type</code> field

D A <code>depends_on</code> field

The value field is required to specify what the output shows.

What is the correct way to reference an AWS instance ID in an output?

A aws_instance.myserver.id

B aws_instance.id.myserver

C myserver.aws_instance.id

D id.aws_instance.myserver

The correct syntax is aws_instance.myserver.id to get the ID attribute.

Why add a description to an output?

A To change the output type

B To make the output required

C To hide the output

D To explain what the output means

Descriptions help users understand the purpose of the output.

Write the syntax for a Terraform output that shows the public IP of a server and includes a description.

Start with output, give it a name, add value and description inside curly braces.

Explain how to protect sensitive information in Terraform outputs and why it is important.

Think about what happens if secret data is shown openly.