Optional attributes in objects in Terraform - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define an object type with an optional attribute.

Terraform

variable "config" {
  type = object({
    name = string
    age  = number
    city = [1] # optional attribute
  })
}

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

Astring

Boptional(string)

Coptional(number)

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Using just 'string' makes the attribute required.

Using 'optional(number)' for a string attribute causes type mismatch.

The optional(string) marks the city attribute as optional in the object type.

2fill in blank

medium

Complete the code to assign a value to the optional attribute in a variable.

Terraform

variable "config" {
  default = {
    name = "Alice"
    age  = 30
    city = [1]
  }
}

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

A30

Bnull

C"New York"

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning a number or boolean to a string attribute.

Using null when a string is expected.

Assigning a string value like "New York" to the optional city attribute is valid.

3fill in blank

hard

Fix the error in the object type definition by correctly marking the optional attribute.

Terraform

variable "config" {
  type = object({
    name = string
    age  = number
    city = [1]
  })
}

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

Astring

Bbool

Cnumber

Doptional(string)

Attempts:

3 left

💡 Hint

Common Mistakes

Leaving the attribute as just 'string' causes errors if the attribute is missing.

Using wrong types like 'number' or 'bool' for a string attribute.

The city attribute must be marked as optional(string) to avoid errors when it is not provided.

4fill in blank

hard

Fill both blanks to define an object with one required and one optional attribute.

Terraform

variable "user" {
  type = object({
    username = [1]
    email    = [2]
  })
}

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

Astring

Boptional(string)

Cnumber

Dbool

Attempts:

3 left

💡 Hint

Common Mistakes

Marking required attributes as optional.

Using wrong types for attributes.

username is required as string, and email is optional as optional(string).

5fill in blank

hard

Fill all three blanks to create an object with two optional and one required attribute.

Terraform

variable "settings" {
  type = object({
    region   = [1]
    timeout  = [2]
    retries  = [3]
  })
}

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

Astring

Boptional(number)

Coptional(string)

Dnumber

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up optional and required attributes.

Using wrong types for attributes.

region is required string, timeout is optional string, and retries is optional number.