State and real infrastructure mapping in Terraform - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of Terraform state?

Terraform state keeps track of the resources it manages. It maps the configuration to real infrastructure so Terraform knows what exists and what needs to change.

beginner

How does Terraform use the state file during deployment?

Terraform reads the state file to understand current infrastructure. It compares this to the desired configuration to plan changes.

intermediate

What can happen if the Terraform state file is lost or corrupted?

Terraform may lose track of resources, causing it to try to recreate or delete resources incorrectly. This can lead to downtime or resource duplication.

intermediate

Why is remote state storage recommended in Terraform?

Remote state storage allows teams to share the state file safely. It prevents conflicts and keeps state backed up and secure.

beginner

What is the difference between Terraform configuration and Terraform state?

Configuration is the code describing desired infrastructure. State is the snapshot of what Terraform has created and manages in the real world.

What does Terraform state file primarily store?

A Cloud provider billing info

B User credentials

C Terraform configuration code

D Current infrastructure resource details

Terraform state stores details about the real infrastructure resources it manages.

Why should Terraform state be stored remotely in team environments?

A To allow multiple users to access and update state safely

B To speed up Terraform execution

C To reduce cloud costs

D To encrypt Terraform configuration files

Remote state storage prevents conflicts by allowing safe shared access to the state file.

What happens if Terraform state is out of sync with real infrastructure?

A Terraform may try to recreate or delete resources incorrectly

B Terraform automatically fixes the state file

C Terraform ignores the state and applies changes blindly

D Terraform deletes all resources

An out-of-sync state can cause Terraform to make wrong changes, risking resource loss or duplication.

Which command updates the Terraform state to match real infrastructure without making changes?

A terraform apply

B terraform refresh

C terraform init

D terraform plan

The 'terraform refresh' command updates the state file to reflect real infrastructure status.

What is stored in Terraform configuration files?

A Cloud provider API keys

B Current infrastructure state

C Desired infrastructure setup

D Terraform state file backup

Configuration files describe the desired infrastructure Terraform should create or manage.

Explain how Terraform state helps map configuration to real infrastructure.

Think about how Terraform knows what exists and what to change.

Describe best practices for managing Terraform state in a team environment.

Consider how teams avoid conflicts and data loss.