Splat expressions in Terraform - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get all instance IDs from the aws_instance resource.

Terraform

output "instance_ids" {
  value = aws_instance.example[1].id
}

Drag options to blanks, or click blank then click option'

A[*]

B.*

C[.]

D[+]

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot (.) instead of [*] for splat expression

Using incorrect brackets like [.] or [+]

The splat expression aws_instance.example[*].id collects the id attribute from all instances in the resource list.

2fill in blank

medium

Complete the code to get all private IP addresses from multiple aws_instance resources.

Terraform

output "private_ips" {
  value = aws_instance.web[1].private_ip
}

Drag options to blanks, or click blank then click option'

A.*

B[*]

C[]

D[.]

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot-star (.*) which is invalid in Terraform

Using empty brackets [] without asterisk

The splat expression aws_instance.web[*].private_ip returns a list of private IPs from all instances named 'web'.

3fill in blank

hard

Fix the error in the splat expression to correctly get all subnet IDs.

Terraform

output "subnet_ids" {
  value = aws_subnet.example[1].id
}

Drag options to blanks, or click blank then click option'

A[*]

B.*

C.[]

D[.]

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot-star (.*) which is not valid in Terraform

Using dot with brackets like .[] or [.]

The correct splat expression uses [*] to get all IDs from the aws_subnet resource list.

4fill in blank

hard

Fill both blanks to create a list of all security group names from aws_security_group resources.

Terraform

output "sg_names" {
  value = aws_security_group.[1][2].name
}

Drag options to blanks, or click blank then click option'

Aweb

Bdb

C[*]

D.*

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot-star (.*) instead of [*]

Using wrong resource name like db instead of web

Use the resource name web and the splat operator [*] to get all security group names.

5fill in blank

hard

Fill all three blanks to output a list of all tags 'Name' values from aws_instance resources.

Terraform

output "instance_names" {
  value = aws_instance.[1][2].tags[3]
}

Drag options to blanks, or click blank then click option'

Aapp

B[*]

C["Name"]

D.*

Attempts:

3 left

💡 Hint

Common Mistakes

Using dot-star (.*) instead of [*]

Accessing tags.Name instead of tags["Name"]

Using wrong resource name like web instead of app

Use the resource name app, the splat operator [*], and access the tag ["Name"] to get all instance names.