The answer is the CodeDeploy automatic rollback configuration with CloudWatch alarm. This is correct because CodeDeploy natively integrates with CloudWatch alarms to monitor deployment health; when an alarm triggers, indicating a failed health check, CodeDeploy automatically reverts the deployment to the last known good revision without requiring custom scripts or additional services. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of native deployment automation features versus workarounds—a common trap is to overcomplicate the solution by suggesting AWS Lambda or Route 53 health checks, which are not directly integrated with CodeDeploy’s rollback mechanism. Remember that CodeDeploy’s automatic rollback is a built-in, declarative feature, not an event-driven custom function. Memory tip: “Alarm triggers, rollback figures”—if you see CloudWatch alarms in a deployment question, think native CodeDeploy rollback first.
SAP-C02 Continuous Improvement for Existing Solutions Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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 company uses AWS CodePipeline to deploy a web application. They want to automatically roll back the deployment if the new version fails CloudWatch alarm-based health checks. Which feature should they use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
CodeDeploy automatic rollback configuration with CloudWatch alarm.
CodeDeploy can be configured to automatically roll back a deployment when a CloudWatch alarm is triggered. This is a native feature. Option B is correct. Options A, C, and D are not directly applicable: Lambda can be used but is not the primary feature; R53 health checks are not integrated with CodeDeploy; CodeBuild is for building, not deploying.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
AWS Lambda function invoked by CloudWatch Events.
Why it's wrong here
Lambda could be used, but CodeDeploy has built-in rollback based on alarms.
✗
Amazon Route 53 health checks with failover routing.
Why it's wrong here
Route 53 health checks are for DNS-level failover, not deployment rollback.
✗
AWS CodeBuild with post-build actions.
Why it's wrong here
CodeBuild is for building and testing, not deployment rollback.
✓
CodeDeploy automatic rollback configuration with CloudWatch alarm.
Why this is correct
CodeDeploy supports automatic rollback when a CloudWatch alarm is in ALARM state.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. 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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SAP-C02 NAT questions on configuration and troubleshooting.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: CodeDeploy automatic rollback configuration with CloudWatch alarm. — CodeDeploy can be configured to automatically roll back a deployment when a CloudWatch alarm is triggered. This is a native feature. Option B is correct. Options A, C, and D are not directly applicable: Lambda can be used but is not the primary feature; R53 health checks are not integrated with CodeDeploy; CodeBuild is for building, not deploying.
What should I do if I get this SAP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related SAP-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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