- A
Install the AWS OpsWorks agent on each EC2 instance.
The agent is required for communication with the OpsWorks service.
- B
Configure the instance's user data to run the Chef client.
Why wrong: Chef client runs automatically via the OpsWorks agent; user data is not needed.
- C
Attach an IAM role with the AmazonEC2RoleforOpsWorks policy to the EC2 instance.
Why wrong: OpsWorks uses a service role, not an instance profile; the instance uses the agent's built-in credentials.
- D
Register the EC2 instance with the OpsWorks stack using the AWS CLI or console.
Registration links the instance to the stack.
- E
Assign the registered instance to the appropriate layer (e.g., web, app).
Layers define the configuration and lifecycle events for the instance.
Question 147 of 1,750
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc 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.
A DevOps team uses AWS OpsWorks for Chef Automate to manage configuration. They want to ensure that all EC2 instances automatically register with OpsWorks and are assigned to the correct layer. Which THREE steps are required? (Choose THREE.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Install the AWS OpsWorks agent on each EC2 instance.
Option A is correct because the AWS OpsWorks agent is required on each EC2 instance to communicate with the OpsWorks service. The agent handles lifecycle events (setup, configure, deploy, shutdown) and runs Chef runs as directed by the OpsWorks stack. Without the agent, the instance cannot register or participate in the OpsWorks management plane.
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.
- ✓
Install the AWS OpsWorks agent on each EC2 instance.
Why this is correct
The agent is required for communication with the OpsWorks service.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure the instance's user data to run the Chef client.
Why it's wrong here
Chef client runs automatically via the OpsWorks agent; user data is not needed.
- ✗
Attach an IAM role with the AmazonEC2RoleforOpsWorks policy to the EC2 instance.
Why it's wrong here
OpsWorks uses a service role, not an instance profile; the instance uses the agent's built-in credentials.
- ✓
Register the EC2 instance with the OpsWorks stack using the AWS CLI or console.
Why this is correct
Registration links the instance to the stack.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Assign the registered instance to the appropriate layer (e.g., web, app).
Why this is correct
Layers define the configuration and lifecycle events for the instance.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse the OpsWorks agent installation (which is mandatory) with the Chef client invocation via user data, or assume that manually attaching an IAM role is a required step when OpsWorks handles it automatically during registration.
Detailed technical explanation
How to think about this question
Under the hood, the OpsWorks agent uses a persistent connection to the OpsWorks service endpoint (opsworks.<region>.amazonaws.com) over HTTPS. It polls for commands and reports instance status. When you register an existing instance via the AWS CLI (aws opsworks register), the agent is installed and configured automatically. The IAM role is critical for the agent to access the OpsWorks API, but OpsWorks handles this when you launch instances through the stack; for manual registration, you must ensure the instance has the correct role, but the question's focus is on the three required steps from the given options, and C is not a required step because OpsWorks can assign the role automatically.
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.
TExam Day Tips
- 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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Install the AWS OpsWorks agent on each EC2 instance. — Option A is correct because the AWS OpsWorks agent is required on each EC2 instance to communicate with the OpsWorks service. The agent handles lifecycle events (setup, configure, deploy, shutdown) and runs Chef runs as directed by the OpsWorks stack. Without the agent, the instance cannot register or participate in the OpsWorks management plane.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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