What is Infrastructure as Code in Terraform - Interactive Quiz & Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define an AWS S3 bucket resource.

Terraform

resource "aws_s3_bucket" "my_bucket" {
  bucket = [1]
}

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

Abucket_name

Bmy_bucket

C"my-unique-bucket-name"

D"bucket"

Attempts:

3 left

💡 Hint

Common Mistakes

Not using quotes around the bucket name.

Using an undefined variable name.

The bucket name must be a string in quotes to be valid in Terraform.

2fill in blank

medium

Complete the code to specify the AWS provider version.

Terraform

terraform {
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = [1]
    }
  }
}

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

A"~> 2.0"

B"= 4.0"

C"^ 3.0"

D"latest"

Attempts:

3 left

💡 Hint

Common Mistakes

Using an invalid version format.

Using "latest" which is not recommended.

The version constraint "~> 2.0" means compatible with 2.x versions.

3fill in blank

hard

Fix the error in the resource block by completing the missing argument.

Terraform

resource "aws_instance" "example" {
  ami           = "ami-12345678"
  instance_type = [1]
}

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

A"micro.t2"

B"t2.micro"

Ct2.micro

Dmicro

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting quotes around the instance type.

Using incorrect instance type names.

The instance_type must be a string with quotes, e.g., "t2.micro".

4fill in blank

hard

Fill both blanks to create a security group with an ingress rule allowing HTTP traffic.

Terraform

resource "aws_security_group" "web_sg" {
  name        = "web_sg"
  description = "Allow HTTP inbound"

  ingress {
    from_port   = [1]
    to_port     = [2]
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

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

A80

B22

C443

D8080

Attempts:

3 left

💡 Hint

Common Mistakes

Using SSH port 22 instead of HTTP port 80.

Using different ports for from_port and to_port.

HTTP traffic uses port 80, so both from_port and to_port should be 80.

5fill in blank

hard

Fill all three blanks to define an output that shows the public IP of an AWS instance.

Terraform

output "instance_ip" {
  value = [1].[2].[3]
}

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

Aaws_instance

Bexample

Cpublic_ip

Dprivate_ip

Attempts:

3 left

💡 Hint

Common Mistakes

Using private_ip instead of public_ip.

Mixing resource names or types incorrectly.

The output references the resource aws_instance.example.public_ip to show the instance's public IP address.

Practice

1. What does Infrastructure as Code mean in simple terms?

easy

A. Using physical servers instead of cloud

B. Manually clicking buttons in the cloud console

C. Writing text files to create and manage cloud resources

D. Writing code only for applications, not infrastructure

Solution

1. Step 1: Understand the concept of Infrastructure as Code

   It means using code or text files to define and manage infrastructure instead of manual steps.

2. Step 2: Compare options with this definition

   Only Writing text files to create and manage cloud resources describes writing text files to manage cloud resources, matching the concept.

3. Final Answer:

   Writing text files to create and manage cloud resources -> Option C

4. Quick Check:

   Infrastructure as Code = writing text files [OK]

Hint: Think: code controls infrastructure, not manual clicks [OK]

Common Mistakes:

• Confusing manual setup with code-based setup
• Thinking Infrastructure as Code means only coding apps
• Assuming physical servers are Infrastructure as Code

2. Which of these is a correct Terraform resource block syntax?

easy

A. resource "aws_instance" "web" { ami = "ami-123" instance_type = "t2.micro" }

B. resource aws_instance web { ami = ami-123 instance_type = t2.micro }

C. resource "aws_instance" web { ami = "ami-123" instance_type = "t2.micro" }

D. resource "aws_instance" "web" ( ami = "ami-123", instance_type = "t2.micro" )

Solution

1. Step 1: Recall Terraform resource block syntax

   It requires the keyword resource, resource type and name in quotes, then braces with key-value pairs.

2. Step 2: Check each option for correct syntax

   resource "aws_instance" "web" { ami = "ami-123" instance_type = "t2.micro" } uses quotes for type and name, braces, and key-value pairs with equals and quotes correctly.

3. Final Answer:

   resource "aws_instance" "web" { ami = "ami-123" instance_type = "t2.micro" } -> Option A

4. Quick Check:

   Correct Terraform resource syntax = resource "aws_instance" "web" { ami = "ami-123" instance_type = "t2.micro" } [OK]

Hint: Look for quotes around type and name, and braces {} [OK]

Common Mistakes:

• Missing quotes around resource type or name
• Using parentheses instead of braces
• Not quoting string values

3. Given this Terraform snippet:

resource "aws_s3_bucket" "bucket" {
  bucket = "my-bucket"
  acl    = "private"
}

What will Terraform do when applied?

medium

A. Create a public S3 bucket named 'my-bucket'

B. Throw a syntax error due to missing region

C. Delete the S3 bucket named 'my-bucket'

D. Create a private S3 bucket named 'my-bucket'

Solution

1. Step 1: Analyze the resource block

   The resource defines an AWS S3 bucket named 'my-bucket' with ACL set to 'private'.

2. Step 2: Understand the effect of ACL 'private'

   This means the bucket will be created with private access, not public.

3. Final Answer:

   Create a private S3 bucket named 'my-bucket' -> Option D

4. Quick Check:

   ACL 'private' means private bucket [OK]

Hint: ACL 'private' means bucket is not public [OK]

Common Mistakes:

• Assuming default is public
• Thinking missing region causes syntax error
• Confusing create with delete actions

4. This Terraform code has an error:

resource "aws_instance" "web" {
  ami = "ami-123"
  instance_type = t2.micro
}

What is the error?

medium

A. Missing resource name

B. Missing quotes around instance_type value

C. Wrong resource type

D. Missing equals sign after ami

Solution

1. Step 1: Check the instance_type line

   The value t2.micro is not in quotes, but it should be a string.

2. Step 2: Confirm correct syntax for string values

   Terraform requires string values to be in quotes, so missing quotes cause an error.

3. Final Answer:

   Missing quotes around instance_type value -> Option B

4. Quick Check:

   String values need quotes in Terraform [OK]

Hint: String values always need quotes in Terraform [OK]

Common Mistakes:

• Forgetting quotes around string values
• Thinking resource name is missing
• Assuming equals sign is missing

5. You want to create two identical AWS EC2 instances using Terraform without repeating code. Which feature helps you do this efficiently?

hard

A. Using a for_each or count loop in the resource block

B. Manually copying the resource block twice

C. Writing separate Terraform files for each instance

D. Using different resource types for each instance

Solution

1. Step 1: Understand the goal to avoid repetition

   We want to create multiple similar resources without copying code.

2. Step 2: Identify Terraform features for repetition

   Terraform supports 'count' and 'for_each' to create multiple instances from one block.

3. Step 3: Evaluate options

   Using a for_each or count loop in the resource block uses these features, while others involve manual repetition or incorrect methods.

4. Final Answer:

   Using a for_each or count loop in the resource block -> Option A

5. Quick Check:

   Loops in Terraform = efficient resource creation [OK]

Hint: Use count or for_each to repeat resources without copy-paste [OK]

Common Mistakes:

• Copy-pasting resource blocks manually
• Creating separate files unnecessarily
• Using different resource types for same resource