Why expressions add logic in Terraform - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to use a conditional expression that sets the instance type to 't2.micro' if the environment is 'dev'.

Terraform

instance_type = var.environment == "dev" ? [1] : "t2.large"

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

A"t2.large"

B"t2.micro"

C"m5.large"

D"c5.xlarge"

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong instance type for the 'dev' environment.

Swapping the true and false parts of the conditional expression.

The conditional expression checks if the environment is 'dev'. If true, it sets the instance type to 't2.micro'. Otherwise, it uses 't2.large'.

2fill in blank

medium

Complete the code to set the number of instances to 3 if the region is 'us-east-1', otherwise 1.

Terraform

count = var.region == "us-east-1" ? [1] : 1

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

A3

B1

C5

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1 instead of 3 for the 'us-east-1' region.

Confusing the true and false values.

The expression sets 'count' to 3 when the region is 'us-east-1'. Otherwise, it sets 'count' to 1.

3fill in blank

hard

Fix the error in the expression that sets 'enable_monitoring' to true only if 'environment' is 'prod'.

Terraform

enable_monitoring = var.environment [1] "prod" ? true : false

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

A!=

B=

C=>

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' instead of '==' for comparison.

Using '=>' which is not valid in this context.

The equality operator '==' is required to compare values in Terraform expressions. Using '=' causes an error.

4fill in blank

hard

Complete the code to create a conditional expression that sets 'storage_type' to 'gp2' if 'use_ssd' is true, otherwise 'standard'.

Terraform

storage_type = var.use_ssd [1] "gp2" : "standard"

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

A?

B:

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' or '!=' instead of '?' and ':'.

Swapping the positions of '?' and ':'.

The conditional expression uses '?' after the condition and ':' before the else value. This sets 'storage_type' to 'gp2' if 'use_ssd' is true, else 'standard'.

5fill in blank

hard

Fill all three blanks to create a conditional expression that sets 'backup_enabled' to true if 'environment' is 'prod' and 'backup_window' is not empty, otherwise false.

Terraform

backup_enabled = var.environment [1] "prod" [2] var.backup_window [3] "" ? true : false

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

A==

B!=

C&&

D||

Attempts:

3 left

💡 Hint

Common Mistakes

Using '||' instead of '&&' which changes the logic.

Mixing up '==' and '!=' operators.

The expression checks if 'environment' equals 'prod' and 'backup_window' is not empty using '==' and '!=' operators combined with '&&' (and). If both are true, 'backup_enabled' is true; otherwise false.