Type constraints in variables in Terraform - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a variable that only accepts strings.

Terraform

variable "example_var" {
  type = [1]
}

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

Abool

Bstring

Cnumber

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'number' instead of 'string' causes errors when assigning text.

Using 'bool' restricts to true/false only.

The string type constraint ensures the variable only accepts string values.

2fill in blank

medium

Complete the code to declare a variable that only accepts a list of strings.

Terraform

variable "example_list" {
  type = [1]
}

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

Aset(number)

Bmap(string)

Clist(string)

Dstring

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'map(string)' expects key-value pairs, not a list.

Using 'string' expects a single string, not a list.

The list(string) type constraint ensures the variable accepts a list where each item is a string.

3fill in blank

hard

Fix the error in the variable type declaration to accept a map with string keys and number values.

Terraform

variable "example_map" {
  type = [1]
}

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

Aobject({key=string})

Bmap(string)

Clist(number)

Dmap(number)

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'map(string)' expects string values, not numbers.

Using 'object' requires a different syntax and is more complex.

The map(number) type constraint allows a map with string keys and number values.

4fill in blank

hard

Fill both blanks to declare a variable that accepts an object with a string 'name' and a number 'age'.

Terraform

variable "person" {
  type = object({
    name = [1],
    age  = [2]
  })
}

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

Astring

Bnumber

Cbool

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the types for 'name' and 'age' causes errors.

Using 'bool' or 'list' types here is incorrect.

The object type requires specifying each attribute's type. Here, 'name' is a string and 'age' is a number.

5fill in blank

hard

Fill all three blanks to declare a variable that accepts a tuple with a string, a number, and a bool.

Terraform

variable "tuple_var" {
  type = tuple([[1], [2], [3]])
}

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

Astring

Bnumber

Cbool

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'list' inside tuple is incorrect.

Mixing the order of types causes type errors.

The tuple type defines an ordered list of fixed types: string, number, and bool in this order.