- A
Use a launch template with a pre-provisioned AMI.
Pre-warmed AMIs have the application already initialized, reducing time to become healthy.
- B
Add a lifecycle hook to delay instance termination.
Why wrong: Lifecycle hooks add delay, not reduce it.
- C
Increase the cooldown period for the scaling policy.
Why wrong: Longer cooldown delays launching new instances.
- D
Use a larger instance type.
Why wrong: Instance size does not affect application initialization time.
Question 878 of 1,546
SOA-C02 Reliability and Business Continuity Practice Question
This SOA-C02 practice question tests your understanding of reliability and business continuity. 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 company runs a stateless web application on EC2 instances in an Auto Scaling group. The instances are behind an Application Load Balancer. The Auto Scaling group uses a dynamic scaling policy based on average CPU utilization. During a traffic spike, new instances are launched but take 5 minutes to become healthy. Users experience errors during this time. Which solution would reduce the time to serve traffic from new instances?
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
✓
Use a launch template with a pre-provisioned AMI.
A pre-provisioned AMI eliminates the need for software installation and configuration at launch time, reducing the time for new EC2 instances to become healthy. By baking the application and dependencies into the AMI, instances can start serving traffic almost immediately after booting, rather than waiting for user data scripts or configuration management tools to complete.
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.
- ✓
Use a launch template with a pre-provisioned AMI.
Why this is correct
Pre-warmed AMIs have the application already initialized, reducing time to become healthy.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Add a lifecycle hook to delay instance termination.
Why it's wrong here
Lifecycle hooks add delay, not reduce it.
- ✗
Increase the cooldown period for the scaling policy.
Why it's wrong here
Longer cooldown delays launching new instances.
- ✗
Use a larger instance type.
Why it's wrong here
Instance size does not affect application initialization time.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think increasing the cooldown period (Option C) helps stabilize scaling, but it actually delays the launch of new instances, making the problem worse during traffic spikes.
Detailed technical explanation
How to think about this question
When using a pre-provisioned AMI, the instance can skip the boot-time configuration steps (e.g., installing packages, copying application code) that typically occur via user data or configuration management tools like Chef or Ansible. This reduces the time from instance launch to passing the ALB health check from minutes to seconds, as the instance only needs to start the application service. In practice, this approach is often combined with immutable infrastructure patterns, where instances are never updated in place but replaced with new AMIs.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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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Reliability and Business Continuity — study guide chapter
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FAQ
Questions learners often ask
What does this SOA-C02 question test?
Reliability and Business Continuity — This question tests Reliability and Business Continuity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use a launch template with a pre-provisioned AMI. — A pre-provisioned AMI eliminates the need for software installation and configuration at launch time, reducing the time for new EC2 instances to become healthy. By baking the application and dependencies into the AMI, instances can start serving traffic almost immediately after booting, rather than waiting for user data scripts or configuration management tools to complete.
What should I do if I get this SOA-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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