Count vs for_each decision in Terraform - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create multiple instances using count.

Terraform

resource "aws_instance" "example" {
  count = [1]
  ami           = "ami-123456"
  instance_type = "t2.micro"
}

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

A3

Bfor_each

C1

Dmap

Attempts:

3 left

💡 Hint

Common Mistakes

Using for_each instead of count when a number is expected.

Passing a map or list directly to count.

The count argument expects a number to specify how many instances to create.

2fill in blank

medium

Complete the code to create resources using for_each with a map.

Terraform

resource "aws_s3_bucket" "example" {
  for_each = [1]
  bucket   = each.key
  acl      = "private"
}

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A["bucket1", "bucket2"]

B3

Ccount

D{"bucket1" = "value1", "bucket2" = "value2"}

Attempts:

3 left

💡 Hint

Common Mistakes

Using a list instead of a map for for_each when keys are needed.

Using count instead of for_each for maps.

The for_each argument expects a map or set of strings to iterate over keys or values.

3fill in blank

hard

Fix the error in the code by choosing the correct for_each value.

Terraform

resource "aws_security_group_rule" "example" {
  for_each = [1]
  type        = "ingress"
  from_port   = 80
  to_port     = 80
  protocol    = "tcp"
  cidr_blocks = [each.value]
}

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

A{"rule1" = "0.0.0.0/0", "rule2" = "10.0.0.0/16"}

B["0.0.0.0/0", "10.0.0.0/16"]

C2

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using a list instead of a map for for_each.

Using count instead of for_each.

for_each requires a map or set of strings to iterate with keys and values.

4fill in blank

hard

Fill both blanks to create multiple resources with count and reference the index.

Terraform

resource "aws_instance" "example" {
  count = [1]
  ami           = "ami-123456"
  instance_type = "t2.micro"
  tags = {
    Name = "instance-$[2]"
  }
}

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

A3

Bcount.index

Cfor_each

Deach.key

Attempts:

3 left

💡 Hint

Common Mistakes

Using for_each with count.index.

Using each.key with count.

Use count to specify number of instances and count.index to reference each instance's index.

5fill in blank

hard

Fill all three blanks to create resources using for_each and access keys and values.

Terraform

resource "aws_s3_bucket" "example" {
  for_each = [1]
  bucket   = [2]
  acl      = "private"
  tags = {
    Environment = [3]
  }
}

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

A{"dev" = "dev-bucket", "prod" = "prod-bucket"}

Beach.key

Ceach.value

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using count instead of for_each.

Mixing each.key and each.value incorrectly.

Use a map for for_each, then access keys with each.key and values with each.value.