- A
Configure automatic rollback based on CloudWatch alarms.
Automatic rollback reduces downtime and impact of failed deployments.
- B
Use a canary deployment to shift traffic gradually.
Gradual shifting allows monitoring and rollback before full traffic shift.
- C
Disable health checks to prevent false positives.
Why wrong: Disabling health checks increases risk by not detecting issues.
- D
Require a manual approval step before deployment.
Why wrong: Manual approval introduces human error and delay but does not reduce technical failure risk.
- E
Deploy to all instances at once to ensure consistency.
Why wrong: All at once increases blast radius if deployment fails.
Question 688 of 1,616
Reducing Failed Deployment Risk with AWS CodeDeploy — Strategies
This DVA-C02 practice question tests your understanding of deployment. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Which TWO strategies can be used to reduce the risk of a failed deployment when using AWS CodeDeploy? (Select TWO.)
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
✓
Configure automatic rollback based on CloudWatch alarms.
Option A is correct because AWS CodeDeploy can automatically trigger a rollback when a CloudWatch alarm is breached, such as when error rates or latency exceed a threshold. This reduces the risk of a failed deployment by reverting to the last known good state without manual intervention. Option B is correct because a canary deployment shifts a small percentage of traffic to the new version first, allowing you to monitor for issues before routing all traffic, minimizing blast radius.
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.
- ✓
Configure automatic rollback based on CloudWatch alarms.
Why this is correct
Automatic rollback reduces downtime and impact of failed deployments.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Use a canary deployment to shift traffic gradually.
Why this is correct
Gradual shifting allows monitoring and rollback before full traffic shift.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Disable health checks to prevent false positives.
Why it's wrong here
Disabling health checks increases risk by not detecting issues.
- ✗
Require a manual approval step before deployment.
Why it's wrong here
Manual approval introduces human error and delay but does not reduce technical failure risk.
- ✗
Deploy to all instances at once to ensure consistency.
Why it's wrong here
All at once increases blast radius if deployment fails.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse manual approval (a pre-deployment gate) with a rollback mechanism, or they mistakenly think disabling health checks reduces false positives, when in fact health checks are critical for detecting failures during deployment.
Detailed technical explanation
How to think about this question
CodeDeploy's automatic rollback feature uses CloudWatch alarms that monitor metrics like HTTP 5xx errors, latency, or custom application metrics. When an alarm state is triggered, CodeDeploy immediately initiates a rollback to the previous revision, and the deployment is marked as 'RolledBack'. Canary deployments are implemented via an AWS Lambda function or an Application Load Balancer (ALB) listener rule that shifts a defined percentage of traffic (e.g., 10%) to the new target group, then waits for a specified time before shifting the remaining 90%.
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.
Quick reference
AAA Protocol Comparison
| Protocol | Port(s) | Encryption | Transport | Primary Use |
|---|---|---|---|---|
| RADIUS | 1812 / 1813 | Password only | UDP | Network access control |
| TACACS+ | 49 | Full packet | TCP | Device administration |
| Diameter | 3868 | Full session | TCP / SCTP | Carrier / mobile networks |
| 802.1X | — | EAP-based | Layer 2 | Port-based access control |
TACACS+ encrypts the entire packet; RADIUS only encrypts the password field — a key exam distinction.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure automatic rollback based on CloudWatch alarms. — Option A is correct because AWS CodeDeploy can automatically trigger a rollback when a CloudWatch alarm is breached, such as when error rates or latency exceed a threshold. This reduces the risk of a failed deployment by reverting to the last known good state without manual intervention. Option B is correct because a canary deployment shifts a small percentage of traffic to the new version first, allowing you to monitor for issues before routing all traffic, minimizing blast radius.
What should I do if I get this DVA-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
This DVA-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 DVA-C02 exam.
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