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ACE Practice Question: Managing Terraform state for a GCP infrastructure…
This ACE practice question tests your understanding of managing terraform state for a gcp infrastructure…. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You are managing Terraform state for a GCP infrastructure project shared by a team of 5 engineers. You need to prevent simultaneous `terraform apply` operations from causing state corruption. What is the recommended backend configuration?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
Configure the `gcs` backend in Terraform, pointing to a Cloud Storage bucket with versioning enabled.
The GCS backend stores state remotely with automatic state locking. Concurrent applies are prevented — the second apply fails with a lock error until the first completes. Versioning provides state history for rollback.
B
Distractor review
Store state locally on each engineer's machine and merge state files manually after each apply.
Local state per engineer leads to state divergence and conflicts. There is no reliable merge process for Terraform state — this approach will cause corruption.
C
Distractor review
Use Terraform Cloud (HashiCorp) as the backend for state locking.
Terraform Cloud is a valid solution for locking, but the question asks for GCP-native configuration. GCS backend achieves the same on GCP.
D
Distractor review
Use a Cloud Source Repository to store state files with branch-based locking.
Git repositories are not designed for Terraform state — they don't provide atomic locking and state files contain sensitive information that shouldn't be in version control.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
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Question 4
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Question 5
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Question 6
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FAQ
Questions learners often ask
What does this ACE question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Configure the `gcs` backend in Terraform, pointing to a Cloud Storage bucket with versioning enabled. — Terraform remote state stored in a Cloud Storage bucket with GCS backend enables state locking using Cloud Storage's object versioning and conditional writes. When using the `gcs` backend, Terraform acquires a lock file in the bucket before any operation that modifies state. Concurrent operations that try to acquire the lock will fail with a lock error, preventing state corruption. This is the recommended pattern for team Terraform workflows on GCP.
What should I do if I get this ACE question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ACE NAT questions on configuration and troubleshooting.
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