The correct answer is that the 'Update Cookbooks' stack command must be run manually to apply the new cookbook version to existing instances. This is because AWS OpsWorks for Chef Automate only automatically fetches and applies cookbooks during specific lifecycle events, such as Setup or Configure, which occur when an instance is first launched or when it rejoins the stack. Simply publishing a new cookbook version to a private S3 bucket does not trigger an automatic update on running instances, even if the instance profile has proper read permissions. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding of OpsWorks lifecycle management versus automatic Chef client behavior—a common trap is assuming the Chef client’s periodic run will fetch new cookbooks, but it only executes recipes already on the instance. To force an update, you must explicitly run the 'Update Cookbooks' command or trigger a Configure event. Memory tip: think of OpsWorks cookbooks as “pull-only on command”—they won’t update unless you give the explicit order.
SOA-C02 Deployment, Provisioning, and Automation Practice Question
This SOA-C02 practice question tests your understanding of deployment, provisioning, and automation. 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.
An organization is using AWS OpsWorks for Chef Automate to manage configuration of EC2 instances. The administrator notices that a new cookbook version is not being applied to existing instances in a layer. The cookbook is stored in a private Amazon S3 bucket and the instances have an instance profile that allows read access. What is the MOST likely reason for this issue?
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 'Update Cookbooks' stack command needs to be run manually to apply the new cookbook version to existing instances.
Option C is correct because in OpsWorks, cookbooks are automatically updated only during the Setup or Configure lifecycle events. To force an update on existing instances, the administrator must run the 'Update Cookbooks' stack command or trigger a Configure lifecycle event. Option A is incorrect because the S3 permissions appear correct. Option B is incorrect because the cookbook version is not automatically downloaded when a new version is published; an update must be triggered. Option D is incorrect because the Chef client runs automatically, but it does not fetch new cookbooks unless told to do so.
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 cookbook version is not being automatically downloaded because the instances are not rebooted.
Why it's wrong here
Why B is wrong
✗
The S3 bucket policy does not grant the necessary permissions to the instance profile.
Why it's wrong here
Why A is wrong
✓
The 'Update Cookbooks' stack command needs to be run manually to apply the new cookbook version to existing instances.
Why this is correct
Why C is correct
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.
✗
The Chef client on the instances is not configured to run automatically.
Why it's wrong here
Why D is wrong
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 SOA-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.
Deployment, Provisioning, and Automation — This question tests Deployment, Provisioning, and Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The 'Update Cookbooks' stack command needs to be run manually to apply the new cookbook version to existing instances. — Option C is correct because in OpsWorks, cookbooks are automatically updated only during the Setup or Configure lifecycle events. To force an update on existing instances, the administrator must run the 'Update Cookbooks' stack command or trigger a Configure lifecycle event. Option A is incorrect because the S3 permissions appear correct. Option B is incorrect because the cookbook version is not automatically downloaded when a new version is published; an update must be triggered. Option D is incorrect because the Chef client runs automatically, but it does not fetch new cookbooks unless told to do so.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-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.
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Question Discussion
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