A web service runs on an Auto Scaling group (ASG). The team updates configuration (AMIs, environment variables) in a Launch Template and wants new instances created during scale-out to use the latest Launch Template version. What should the architect do?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
Distractor review
Leave the ASG attached to the previous Launch Template version so scale-out is stable.
Keeping an older Launch Template version prevents new instances from receiving updates. ASG scale-out should reflect the latest desired configuration. Stability is better handled by controlled version updates.
Best answer
Set the ASG to use the latest Launch Template version and optionally start an instance refresh for existing instances.
ASG scale-out uses the configured Launch Template version at instance launch time. Switching the ASG to the latest version ensures new instances are consistent. An instance refresh helps apply changes to running instances safely and predictably.
Distractor review
Manually SSH into each new instance and reconfigure it after it launches.
Manual configuration does not scale and introduces drift between instances. It also delays readiness and can cause inconsistent behavior during rapid scaling. Launch Templates are intended to automate instance configuration.
Distractor review
Move the configuration changes into a security group rule so the ASG updates them automatically.
Security groups control network access, not application configuration or runtime parameters. Putting configuration into security group rules is not an appropriate mechanism. ASG instance configuration is managed via Launch Template data.
Common exam trap
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.
Technical deep dive
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.
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Question 2
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Question 5
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Set the ASG to use the latest Launch Template version and optionally start an instance refresh for existing instances. — Auto Scaling instances launched from the ASG use the Launch Template version referenced by the ASG configuration. Updating the Launch Template alone does not change what the ASG uses until you point the ASG to the new version. If you need changes for current instances too, use an instance refresh (or a controlled rolling replacement) to avoid downtime. This approach ensures consistent, repeatable scale-out behavior. Why others are wrong: Option A keeps the ASG tied to an old Launch Template version, so scale-out would still launch outdated instances. Option C relies on manual reconfiguration, which is error-prone, slow, and causes configuration drift. Option D misuses security groups; they do not carry application configuration or environment variables. The correct mechanism is updating the Launch Template version used by the ASG.
What should I do if I get this SAA-C03 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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