Meta-arguments overview in Terraform - Cheat Sheet & Quick Revision

Recall & Review

beginner

What are meta-arguments in Terraform?

Meta-arguments are special arguments that can be used inside Terraform resource blocks to control how resources behave, like loops, conditions, or dependencies.

beginner

Name three common meta-arguments in Terraform.

Common meta-arguments include count (to create multiple instances), for_each (to create resources from a map or set), and depends_on (to specify resource dependencies).

beginner

How does the count meta-argument work?

The count meta-argument tells Terraform how many copies of a resource to create. For example, count = 3 creates three identical resources.

intermediate

What is the purpose of depends_on in Terraform?

depends_on tells Terraform to create or update a resource only after certain other resources are done. It helps control the order of operations.

intermediate

When should you use for_each instead of count?

Use for_each when you want to create resources based on a map or set with unique keys, so you can easily reference each resource by its key. count is simpler but only uses numeric indexes.

Which meta-argument creates multiple copies of a resource by number?

A for_each

B count

C depends_on

D lifecycle

count creates multiple copies by number. for_each uses keys, depends_on manages dependencies, and lifecycle controls resource lifecycle.

What does depends_on control in Terraform?

A Resource creation order

B Number of resource copies

C Resource naming

D Resource tags

depends_on controls the order in which Terraform creates or updates resources.

Which meta-argument allows creating resources from a map or set with unique keys?

A count

B depends_on

C provider

D for_each

for_each creates resources from a map or set using unique keys.

Can you use both count and for_each in the same resource block?

A Only if the resource supports it

B Yes, always

C No, they cannot be used together

D Only with depends_on

You cannot use count and for_each together in the same resource block.

What happens if you set count = 0 for a resource?

A Terraform creates zero resources

B Terraform creates default resources

C Terraform throws an error

D Terraform creates one resource

Setting count = 0 means Terraform creates no instances of that resource.

Explain what meta-arguments are in Terraform and give examples.

Think about special settings inside resource blocks that change how many or when resources are created.

Describe the difference between using count and for_each meta-arguments.

Consider how you choose which resources to create and how you refer to them.