The answer is the Auto Scaling group must have a target group ARN specified in its configuration, and the launch template or configuration must use an AMI that supports the ALB’s health checks. This works because the Auto Scaling group uses the target group ARN to know exactly where to register new instances, while the AMI must be compatible with the ALB’s health check protocol—typically HTTP or HTTPS—so the load balancer can properly route traffic and verify instance health. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding of the glue between Auto Scaling and Elastic Load Balancing in CloudFormation; a common trap is thinking you need to attach the ALB itself or set a health check grace period, but those are separate concerns. Remember the memory tip: “ARN and AMI” are the two keys—the ARN points the group to the target, and the AMI must speak the ALB’s language.
SOA-C02 Deployment, Provisioning, and Automation Practice Question
This SOA-C02 practice question tests your understanding of deployment, provisioning, and automation. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 SysOps administrator is automating the deployment of a web application using AWS CloudFormation. The application requires an Application Load Balancer (ALB) and an Auto Scaling group. The administrator wants to ensure that the Auto Scaling group registers instances with the ALB automatically. Which of the following are required? (Choose TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A launch template or launch configuration that defines the AMI and instance type.
To automatically register instances with an ALB, the Auto Scaling group must have a target group ARN specified, and the launch template or configuration must use an AMI that supports the ALB's health checks. Option B and D are correct. Option A is wrong because a load balancer is created separately, but the Auto Scaling group needs the target group. Option C is wrong because the health check grace period is optional. Option E is wrong because the security group is not directly related to automatic registration.
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.
✓
A launch template or launch configuration that defines the AMI and instance type.
Why this is correct
The launch template/configuration is required for the Auto Scaling group to launch instances.
Related concept
Read the scenario before looking for a memorised answer.
✗
A health check grace period set in the Auto Scaling group.
Why it's wrong here
The grace period is optional and does not affect automatic registration.
✗
A security group that allows traffic from the ALB.
Why it's wrong here
Security groups are needed for traffic flow but not for automatic registration.
✓
A target group ARN specified in the Auto Scaling group's configuration.
Why this is correct
The Auto Scaling group uses the target group to register instances.
Related concept
Read the scenario before looking for a memorised answer.
✗
An Application Load Balancer created in the same stack.
Why it's wrong here
The Auto Scaling group needs a target group, not the load balancer itself.
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 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 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: A launch template or launch configuration that defines the AMI and instance type. — To automatically register instances with an ALB, the Auto Scaling group must have a target group ARN specified, and the launch template or configuration must use an AMI that supports the ALB's health checks. Option B and D are correct. Option A is wrong because a load balancer is created separately, but the Auto Scaling group needs the target group. Option C is wrong because the health check grace period is optional. Option E is wrong because the security group is not directly related to automatic registration.
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.
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 SOA-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 SOA-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.