Default values in Terraform - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a default value in Terraform variables?

A default value is a preset value assigned to a variable. It is used when no other value is provided during deployment.

beginner

How do you define a default value for a variable in Terraform?

Use the 'default' argument inside the variable block. For example:<br>

variable "region" {<br>  type    = string<br>  default = "us-west-1"<br>}

beginner

What happens if you do not provide a value for a variable without a default in Terraform?

Terraform will prompt you to enter a value during deployment because it has no default to fall back on.

beginner

Why are default values useful in Terraform configurations?

They simplify deployments by providing common values automatically, reducing the need for manual input every time.

intermediate

Can default values be overridden in Terraform? How?

Yes, default values can be overridden by providing a value through command line flags, environment variables, or variable files.

What keyword is used to set a default value for a variable in Terraform?

A default

B value

C set

D initial

The 'default' keyword assigns a default value to a variable in Terraform.

If a variable has a default value, what happens when you do not provide a value during deployment?

A Terraform prompts for input

B Terraform uses the default value

C Terraform throws an error

D Terraform skips the variable

Terraform automatically uses the default value if no other value is provided.

Which of these is NOT a way to override a default variable value in Terraform?

A Passing a command line flag

B Setting an environment variable

C Using a variable file

D Editing the Terraform binary

Editing the Terraform binary is not a valid way to override variable values.

What type of variable must you provide a value for if it has no default?

A Required variable

B Optional variable

C Output variable

D Local variable

Variables without defaults are required and must be given a value.

Why might you want to use default values in Terraform variables?

A To disable variables

B To make deployment slower

C To reduce manual input and simplify deployment

D To prevent any changes to variables

Default values help reduce manual input and make deployments easier.

Explain how default values work in Terraform variables and why they are helpful.

Think about what happens if you don't provide a value.

Describe the ways you can override a default variable value in Terraform.

Consider different methods to provide values when running Terraform.