The correct answer is to configure the alarm to send a notification to an SNS topic. This works because CloudWatch Synthetics canaries automatically emit a `SuccessPercent` metric to CloudWatch after each run; by setting an alarm on this metric—for instance, when `SuccessPercent` drops below 100—you trigger an alert on any failure without needing custom instrumentation. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding of how native monitoring services integrate: the trap is assuming you must create a custom metric or use a separate logging service, when in fact the canary’s built-in metric is the direct path. Remember that the `SuccessPercent` metric is the canary’s heartbeat—if it dips, the alarm fires to SNS. A useful memory tip: “Canary sings, metric pings, SNS rings.”
SOA-C02 Monitoring, Logging, and Remediation Practice Question
This SOA-C02 practice question tests your understanding of monitoring, logging, and remediation. 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.
An organization uses Amazon CloudWatch Synthetics canaries to monitor its web application endpoints. A SysOps administrator needs to be alerted when a canary run fails. Which THREE steps are required to set up this alerting?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a CloudWatch alarm on the canary's `SuccessPercent` metric.
Option B is correct because CloudWatch Synthetics canaries automatically publish a `SuccessPercent` metric to CloudWatch. By configuring a CloudWatch alarm on this metric (e.g., when `SuccessPercent` drops below 100), the administrator can trigger an alert whenever a canary run fails. This is the standard method for monitoring canary health without needing custom metrics.
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.
✗
Create a custom CloudWatch metric for canary failures.
Why it's wrong here
Canaries automatically emit built-in metrics.
✓
Configure a CloudWatch alarm on the canary's `SuccessPercent` metric.
Why this is correct
The alarm will trigger when success rate drops below threshold.
Related concept
Read the scenario before looking for a memorised answer.
✓
Create a canary in CloudWatch Synthetics.
Why this is correct
The canary must exist to generate metrics.
Related concept
Read the scenario before looking for a memorised answer.
✓
Configure the alarm to send a notification to an SNS topic.
Why this is correct
SNS can send email or SMS alerts.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable detailed monitoring on the canary.
Why it's wrong here
Detailed monitoring is not required; standard metrics are sufficient.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume they must create a custom metric (Option A) or enable detailed monitoring (Option E) because they confuse Synthetics canaries with EC2 detailed monitoring, when in fact the built-in `SuccessPercent` metric is sufficient and automatically available.
Detailed technical explanation
How to think about this question
Under the hood, each canary run produces a `SuccessPercent` metric with a value of 100 for success or 0 for failure, aggregated over the evaluation period. The alarm can be set to treat missing data as 'breaching' to catch scenarios where the canary fails to start or is deleted. In real-world scenarios, you might also combine this with a composite alarm on `Failed` metric count to reduce noise from transient network blips.
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.
Monitoring, Logging, and Remediation — This question tests Monitoring, Logging, and Remediation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Configure a CloudWatch alarm on the canary's `SuccessPercent` metric. — Option B is correct because CloudWatch Synthetics canaries automatically publish a `SuccessPercent` metric to CloudWatch. By configuring a CloudWatch alarm on this metric (e.g., when `SuccessPercent` drops below 100), the administrator can trigger an alert whenever a canary run fails. This is the standard method for monitoring canary health without needing custom metrics.
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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Question Discussion
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