The correct answer is that the security group rule was added manually via the AWS console and is not managed by Terraform, causing state to be out of sync. This occurs because Terraform’s state file records resources it created, but any rule added outside of its workflow—such as through the AWS Management Console or CLI—remains unknown to Terraform. Since Terraform only tracks resources defined in its configuration, running terraform plan shows no changes because it does not detect drift for resources it never managed. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this scenario tests your understanding of Terraform state drift and the importance of maintaining a single source of truth for infrastructure. A common trap is assuming terraform refresh or import would automatically fix this, but refresh only updates state for managed resources, and import is required to bring external resources under Terraform control. Memory tip: “If Terraform didn’t build it, it won’t see it—import or recreate to free it.”
DOP-C02 Configuration Management and IaC Practice Question
This DOP-C02 practice question tests your understanding of configuration management and iac. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 team uses Terraform to manage AWS infrastructure. After a recent update, a state file shows that a security group rule was created, but the rule does not exist in AWS. Running 'terraform plan' shows no changes. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The security group rule was added manually via the AWS console and is not managed by Terraform, causing state to be out of sync.
Option A is correct because if the rule was created outside Terraform, the state file may be out of sync, and Terraform detects no drift if the rule is not managed. Option B is wrong because 'terraform refresh' would update state, but plan shows no changes. Option C is wrong because if import is needed, plan would show changes. Option D is wrong because it would cause errors, not missing rules.
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.
✗
The security group rule was imported into state but not defined in configuration.
Why it's wrong here
If imported, configuration would match, so no changes.
✗
The 'terraform refresh' command was not run before the plan.
Why it's wrong here
Refresh would update state to match reality, and then plan would show creation.
✗
There is a conflict between multiple Terraform workspaces.
Why it's wrong here
Workspaces separate state, but this doesn't explain missing rule.
✓
The security group rule was added manually via the AWS console and is not managed by Terraform, causing state to be out of sync.
Why this is correct
Terraform state thinks the rule exists, but it doesn't. Plan shows no changes because Terraform believes it's already there.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
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.
Trap categories for this question
Command / output trap
Refresh would update state to match reality, and then plan would show creation.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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: The security group rule was added manually via the AWS console and is not managed by Terraform, causing state to be out of sync. — Option A is correct because if the rule was created outside Terraform, the state file may be out of sync, and Terraform detects no drift if the rule is not managed. Option B is wrong because 'terraform refresh' would update state, but plan shows no changes. Option C is wrong because if import is needed, plan would show changes. Option D is wrong because it would cause errors, not missing rules.
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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This DOP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DOP-C02 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.