The answer is to install and configure the CloudWatch agent on the EC2 instances. This is the correct solution because the default CloudWatch metrics only capture hypervisor-level data like CPU and network, whereas the CloudWatch agent uses plugins such as procstat and disk to collect custom OS-level metrics like memory usage and disk I/O directly from the operating system. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this question tests your understanding of the distinction between standard and custom metrics, and a common trap is assuming the default monitoring or the older SSM agent can collect these OS-level details. Remember that for any metric inside the guest OS—memory, disk I/O, or process-level data—you must deploy the CloudWatch agent. A helpful memory tip is "Default is hypervisor, Agent is OS," reinforcing that the agent reaches into the instance itself to gather the metrics you need.
SOA-C02 Monitoring, Logging, and Remediation Practice Question
This SOA-C02 practice question tests your understanding of monitoring, logging, and remediation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 SysOps administrator needs to centrally collect operating system-level metrics from a fleet of Amazon EC2 instances running Amazon Linux 2. The metrics should include memory usage and disk I/O. Which solution should the administrator implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Install and configure the CloudWatch agent on the EC2 instances.
The CloudWatch agent is the correct solution because it can collect custom OS-level metrics such as memory usage and disk I/O from EC2 instances running Amazon Linux 2. Unlike the default CloudWatch metrics, which only capture hypervisor-level metrics (e.g., CPU, network), the CloudWatch agent uses the procstat and disk plugins to gather detailed system metrics and publish them to CloudWatch as custom namespaces.
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.
✓
Install and configure the CloudWatch agent on the EC2 instances.
Why this is correct
The CloudWatch agent can collect custom metrics like memory and disk I/O.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable detailed monitoring on the EC2 instances.
Why it's wrong here
Detailed monitoring only provides more frequent basic metrics, not memory or disk I/O.
✗
Use AWS CloudTrail to log OS-level metrics.
Why it's wrong here
CloudTrail records API calls, not OS metrics.
✗
Use AWS Systems Manager Inventory to collect metrics.
Why it's wrong here
Systems Manager Inventory collects software and configuration data, not performance metrics.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'detailed monitoring' (which only increases frequency of existing hypervisor metrics) with the ability to collect new OS-level metrics, leading them to incorrectly select Option B.
Detailed technical explanation
How to think about this question
The CloudWatch agent uses a JSON configuration file to define which metrics to collect, such as mem_used_percent for memory and diskio_io_time for disk I/O. It can also collect metrics from custom log files and send them to CloudWatch Logs. In a real-world scenario, you might need to configure the agent to emit metrics to a custom namespace (e.g., CWAgent) to avoid conflicts with default EC2 metrics.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
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: Install and configure the CloudWatch agent on the EC2 instances. — The CloudWatch agent is the correct solution because it can collect custom OS-level metrics such as memory usage and disk I/O from EC2 instances running Amazon Linux 2. Unlike the default CloudWatch metrics, which only capture hypervisor-level metrics (e.g., CPU, network), the CloudWatch agent uses the procstat and disk plugins to gather detailed system metrics and publish them to CloudWatch as custom namespaces.
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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