The answer is to use DynamoDB for state locking and enable consistency checks. This prevents Terraform state corruption by ensuring that only one user or process can run a state-modifying operation at a time, eliminating the race condition that occurs when concurrent 'terraform apply' commands overwrite the state file in S3. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of Terraform backend best practices and the specific role of DynamoDB as a distributed locking mechanism, often appearing as a distractor where versioning or encryption is incorrectly chosen. A common trap is assuming S3 versioning alone prevents corruption—it only enables recovery, not prevention. Remember the mnemonic: "Lock before you rock" to recall that DynamoDB locking is the proactive safeguard against concurrent state writes.
DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A company uses Terraform with an S3 backend to manage infrastructure. The DevOps engineer notices that after a colleague runs 'terraform apply' locally, the state file in S3 becomes corrupted and subsequent runs fail. What is the BEST way to prevent this issue?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use DynamoDB for state locking and enable consistency checks.
Option B is correct because enabling DynamoDB state locking prevents concurrent modifications that can corrupt the state file. Option A is wrong because versioning only allows recovery, not prevention. Option C is wrong because encryption does not prevent corruption. Option D is wrong because it is not a best practice for state management.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Store the state file locally and commit it to version control.
Why it's wrong here
Not a best practice; state files should not be in version control.
✓
Use DynamoDB for state locking and enable consistency checks.
Why this is correct
Prevents concurrent modifications that cause corruption.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use S3 server-side encryption to protect the state file.
Why it's wrong here
Does not prevent corruption.
✗
Enable S3 versioning on the state bucket to recover previous versions.
Why it's wrong here
Does not prevent corruption; only aids recovery.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Configuration Management and IaC — This question tests Configuration Management and IaC — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use DynamoDB for state locking and enable consistency checks. — Option B is correct because enabling DynamoDB state locking prevents concurrent modifications that can corrupt the state file. Option A is wrong because versioning only allows recovery, not prevention. Option C is wrong because encryption does not prevent corruption. Option D is wrong because it is not a best practice for state management.
What should I do if I get this DOP-C02 question wrong?
Identify which DOP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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