Resource types and names in Terraform - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Identify the correct resource type in Terraform

Which of the following is the correct resource type for creating an AWS S3 bucket in Terraform?

A bucket_aws_s3

B aws_bucket_s3

C s3_aws_bucket

D aws_s3_bucket

💡 Hint

Resource types in Terraform usually start with the provider name, followed by the resource name.

The correct resource type for an AWS S3 bucket is aws_s3_bucket. It starts with the provider 'aws' followed by the resource 's3_bucket'.

❓ Configuration

intermediate

Determine the valid resource name in Terraform

Which of the following is a valid resource name in Terraform?

A my resource

B 1myresource

C my-resource_1

D myResource!

💡 Hint

Resource names must start with a letter or underscore and can contain letters, digits, underscores, and dashes.

Option C is valid because it starts with a letter and contains only letters, digits, underscores, and dashes. Option C starts with a digit, which is invalid. Option C contains a space, and Option C contains an exclamation mark, both invalid characters.

❓ Architecture

advanced

Predict the resource count after applying Terraform configuration

Given the following Terraform configuration snippet, how many AWS EC2 instances will be created?

resource "aws_instance" "web" {
  count = 3
  ami           = "ami-12345678"
  instance_type = "t2.micro"
}

resource "aws_instance" "db" {
  count = 2
  ami           = "ami-87654321"
  instance_type = "t2.micro"
}

A 5

B 3

C 1

D 2

💡 Hint

Count defines how many instances of a resource are created.

The 'web' resource creates 3 instances and the 'db' resource creates 2 instances. Total instances = 3 + 2 = 5.

❓ security

advanced

Identify the security risk in resource naming

Which resource naming practice can lead to a security risk in Terraform configurations?

A Using short, generic resource names

B Using descriptive names that reveal sensitive environment details

C Using only lowercase letters and numbers in names

D Using underscores instead of dashes in resource names

💡 Hint

Think about what information might be exposed unintentionally.

Using descriptive names that reveal sensitive environment details (like 'prod-db-password') can expose information to unauthorized users. Generic names or neutral naming conventions reduce this risk.

❓ service_behavior

expert

Analyze the effect of resource renaming in Terraform state

What happens if you rename a resource block's name in Terraform configuration without using state commands?

Original:
resource "aws_s3_bucket" "mybucket" {
  bucket = "example-bucket"
}

Renamed:
resource "aws_s3_bucket" "mybucket_renamed" {
  bucket = "example-bucket"
}

A Terraform will try to create a new bucket and delete the old one

B Terraform will update the existing bucket in place

C Terraform will ignore the change and do nothing

D Terraform will merge both resources into one

💡 Hint

Think about how Terraform tracks resources in its state file.

Terraform tracks resources by their type and name. Renaming a resource makes Terraform think the old resource was removed and a new one added. It plans to delete the old resource and create a new one unless you use state commands to rename it in the state.