Terraform fmt for formatting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to format Terraform files using the correct command.

Terraform

terraform [1]

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

Aapply

Binit

Cplan

Dfmt

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'apply' instead of 'fmt' which runs changes instead of formatting.

Using 'init' which initializes Terraform but does not format files.

The terraform fmt command formats Terraform configuration files to a canonical format and style.

2fill in blank

medium

Complete the command to format Terraform files recursively in all subdirectories.

Terraform

terraform fmt [1]

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

A-list

B-recursive

C-check

D-diff

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-list' which only lists files that would be formatted.

Using '-check' which only checks formatting without changing files.

The -recursive flag tells terraform fmt to format files in the current directory and all subdirectories.

3fill in blank

hard

Fix the error in the command to check formatting without changing files.

Terraform

terraform fmt [1]

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

A-check

B-diff

C-write=true

D-recursive

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-write=true' which actually writes changes to files.

Using '-diff' which shows differences but does not check status.

The -check flag checks if files are formatted correctly without modifying them.

4fill in blank

hard

Fill both blanks to format files and show differences without writing changes.

Terraform

terraform fmt [1] [2]

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

A-diff

B-recursive

C-check

D-write=false

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-check' instead of '-diff' which only checks formatting.

Omitting '-recursive' which limits formatting to current folder.

Using -recursive formats all files in subdirectories, and -diff shows the differences without changing files.

5fill in blank

hard

Fill all three blanks to check formatting recursively and prevent writing changes.

Terraform

terraform fmt [1] [2] [3]

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

A-recursive

B-check

C-write=false

D-diff

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-write=true' which would modify files.

Omitting '-recursive' which skips subfolders.

The flags -recursive, -check, and -write=false together check formatting in all folders without modifying files.

Practice

1. What is the main purpose of the terraform fmt command?

easy

A. To check for syntax errors in Terraform files

B. To deploy infrastructure to the cloud

C. To automatically format Terraform configuration files for readability

D. To destroy all Terraform-managed resources

Solution

1. Step 1: Understand the role of terraform fmt

   This command is designed to clean up and standardize the formatting of Terraform files, making them easier to read and maintain.

2. Step 2: Differentiate from other commands

   Unlike commands that deploy or destroy resources, terraform fmt only changes the file layout without affecting infrastructure.

3. Final Answer:

   To automatically format Terraform configuration files for readability -> Option C

4. Quick Check:

   Formatting = Readability [OK]

Hint: Remember: fmt = format code, not deploy or destroy [OK]

Common Mistakes:

• Confusing fmt with terraform apply
• Thinking fmt checks syntax errors
• Assuming fmt manages resources

2. Which of the following is the correct way to run terraform fmt on all files in the current directory?

easy

A. terraform fmt

B. terraform fmt -recursive

C. terraform fmt -all

D. terraform fmt --format-all

Solution

1. Step 1: Recall default behavior of terraform fmt

   By default, running terraform fmt without flags formats all Terraform files in the current directory.

2. Step 2: Check other options

   Options like -recursive exist to format subdirectories, but -all and --format-all are invalid flags.

3. Final Answer:

   terraform fmt -> Option A

4. Quick Check:

   Default fmt formats current directory [OK]

Hint: No flags needed to format current folder files [OK]

Common Mistakes:

• Using invalid flags like -all or --format-all
• Confusing recursive flag with default behavior
• Expecting fmt to format files outside current directory by default

3. Given this Terraform snippet before formatting:

resource "aws_instance" "example" {
ami = "ami-123456"
instance_type= "t2.micro"
}

What will terraform fmt do to this code?

medium

A. Add comments explaining each line

B. Add spaces around the equals sign and indent the block properly

C. Remove the resource block entirely

D. Change the resource type to "aws_server"

Solution

1. Step 1: Identify formatting issues

   The snippet lacks spaces around the equals sign and proper indentation inside the resource block.

2. Step 2: Understand what terraform fmt fixes

   It adds spaces around operators and indents blocks correctly but does not change resource types or add comments.

3. Final Answer:

   Add spaces around the equals sign and indent the block properly -> Option B

4. Quick Check:

   Fmt fixes spacing and indentation [OK]

Hint: Fmt fixes spacing and indentation, not content [OK]

Common Mistakes:

• Thinking fmt changes resource types
• Expecting fmt to add comments
• Assuming fmt deletes code blocks

4. You ran terraform fmt but your Terraform files still look messy. What is the most likely reason?

medium

A. Terraform fmt does not change file formatting

B. Terraform fmt only works on .tfvars files

C. Your files have syntax errors preventing formatting

D. You ran terraform fmt in the wrong directory

Solution

1. Step 1: Check where terraform fmt runs

   The command formats files in the current directory by default, so running it elsewhere won't affect your target files.

2. Step 2: Eliminate other options

   Terraform fmt does change formatting, works on .tf files, and does not require syntax correctness to format.

3. Final Answer:

   You ran terraform fmt in the wrong directory -> Option D

4. Quick Check:

   Run fmt where files are located [OK]

Hint: Run fmt in folder with your Terraform files [OK]

Common Mistakes:

• Assuming fmt fixes syntax errors
• Thinking fmt works on .tfvars files only
• Expecting fmt to format files outside current folder

5. You want to ensure all Terraform files in your project and all subfolders are formatted consistently before committing code. Which command should you use?

hard

A. terraform fmt -recursive

B. terraform fmt -all

C. terraform fmt --check

D. terraform fmt --init

Solution

1. Step 1: Understand recursive formatting

   The -recursive flag tells terraform fmt to format files in the current directory and all subdirectories.

2. Step 2: Review other options

   -all and --init are invalid flags; --check only verifies formatting without changing files.

3. Final Answer:

   terraform fmt -recursive -> Option A

4. Quick Check:

   Recursive flag formats all folders [OK]

Hint: Use -recursive to format all subfolders [OK]

Common Mistakes:

• Using invalid flags like -all
• Confusing --check with formatting action
• Trying to use --init for formatting