Quick Answer
The answer is Amazon CloudWatch, as it is the only service capable of collecting and visualizing custom metrics like EBS free space from EC2 instances. This is accomplished by installing the CloudWatch agent on each SAP instance, which gathers operating-system-level disk metrics—such as available bytes or used percent—and sends them to CloudWatch for graphing and alerting. On the AWS Certified SAP on AWS Specialty PAS-C01 exam, this scenario tests your understanding of the CloudWatch agent’s role in monitoring SAP-specific system resources, often appearing as a distractor against CloudTrail (API logging), Config (compliance), or Trusted Advisor (best-practice checks). A common trap is confusing CloudWatch with CloudTrail; remember that CloudTrail tracks who did what, while CloudWatch tracks what the system is doing. Memory tip: think “Watch the disk, Trail the API.”
This PAS-C01 practice question tests your understanding of operations and maintenance. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 SAP administrator needs to monitor the free space of EBS volumes across multiple EC2 instances running SAP. Which AWS service should be used to collect and visualize this data?
AWS CloudTrail
Why wrong: CloudTrail records API activity, not disk metrics.
Amazon CloudWatch
CloudWatch with the unified agent can collect disk metrics from instances.
AWS Config
Why wrong: Config tracks resource configuration, not performance metrics.
AWS Trusted Advisor
Why wrong: Trusted Advisor gives recommendations, not real-time monitoring.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Amazon CloudWatch
Option D is correct because CloudWatch can collect custom metrics from EC2 instances using the CloudWatch agent. Option A is wrong because CloudTrail logs API calls, not system metrics. Option B is wrong because Config tracks configuration changes. Option C is wrong because Trusted Advisor provides best-practice checks, not real-time monitoring.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
AWS CloudTrail
Why it's wrong here
CloudTrail records API activity, not disk metrics.
Amazon CloudWatch
Why this is correct
CloudWatch with the unified agent can collect disk metrics from instances.
Related concept
Read the scenario before looking for a memorised answer.
AWS Config
Why it's wrong here
Config tracks resource configuration, not performance metrics.
AWS Trusted Advisor
Why it's wrong here
Trusted Advisor gives recommendations, not real-time monitoring.
Common exam traps
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
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which PAS-C01 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.
Operations and Maintenance — study guide chapter
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FAQ
Operations and Maintenance — This question tests Operations and Maintenance — Read the scenario before looking for a memorised answer..
The correct answer is: Amazon CloudWatch — Option D is correct because CloudWatch can collect custom metrics from EC2 instances using the CloudWatch agent. Option A is wrong because CloudTrail logs API calls, not system metrics. Option B is wrong because Config tracks configuration changes. Option C is wrong because Trusted Advisor provides best-practice checks, not real-time monitoring.
Identify which PAS-C01 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.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 20, 2026
This PAS-C01 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 PAS-C01 exam.
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