The answer is to create a CloudWatch alarm on the StatusCheckFailed metric with an SNS action. This is the simplest solution because EC2 status checks are built-in, hypervisor-level health tests that run every minute, and CloudWatch can directly monitor the aggregate StatusCheckFailed metric (which covers both system and instance checks) to trigger an SNS notification when any instance fails. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your ability to distinguish between monitoring mechanisms: a common trap is confusing CloudTrail (which logs API calls, not instance health) or ELB health checks (which track target group status, not EC2 status checks) with the direct, real-time metric. Remember that status checks are always on by default and require no agent, making them the fastest indicator of underlying hardware or software issues. Memory tip: think "Status Check = CloudWatch + SNS" for instant notification, not CloudTrail or SSM.
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 runs a critical application on EC2 instances in an Auto Scaling group. They want to be notified immediately if any instance fails a status check. What is the simplest solution?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a CloudWatch alarm on the StatusCheckFailed metric with an SNS action.
CloudWatch alarms can monitor EC2 status check metrics and trigger an SNS notification. Option B is correct. Option A uses CloudTrail for API calls, not status checks. Option C is for load balancer target health. Option D uses SSM, which is not real-time for status checks.
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 an ELB health check and monitor the unhealthy host count.
Why it's wrong here
ELB health checks are for load balancing, but not all instances may be behind an ELB.
✗
Use AWS Systems Manager Automation to check instance status periodically.
Why it's wrong here
SSM Automation is not designed for real-time notifications.
✓
Create a CloudWatch alarm on the StatusCheckFailed metric with an SNS action.
Why this is correct
StatusCheckFailed metric is available and can trigger alarms.
Clue confirmation
The clue word "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable AWS CloudTrail and create a metric filter for EC2 instance failures.
Why it's wrong here
CloudTrail logs API calls, not instance status checks.
Common exam traps
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.
Detailed technical explanation
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.
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 SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a CloudWatch alarm on the StatusCheckFailed metric with an SNS action. — CloudWatch alarms can monitor EC2 status check metrics and trigger an SNS notification. Option B is correct. Option A uses CloudTrail for API calls, not status checks. Option C is for load balancer target health. Option D uses SSM, which is not real-time for status checks.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
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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