- A
Create an IAM role that allows CloudWatch Logs to read the log data and publish metrics.
Why wrong: No additional IAM role is needed; the instance profile provides necessary permissions.
- B
Define the metric filter pattern to match HTTP status codes in the log entries.
The filter pattern is essential to parse the logs correctly.
- C
Create a metric filter in CloudWatch Logs on the log group that contains the application logs.
Metric filters are defined on log groups to extract metrics.
- D
Configure a subscription filter to forward the logs to a Lambda function that creates the metric.
Why wrong: Subscription filters are for streaming, not for metric filters.
- E
Install the CloudWatch Agent on the EC2 instances to send the logs.
Why wrong: The older CloudWatch Logs agent can also send logs; the CloudWatch Agent is an alternative but not required.
DOP-C02 Monitoring and Logging Practice Question
This DOP-C02 practice question tests your understanding of monitoring and logging. 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.
A company uses Amazon CloudWatch Logs to centralize logs from multiple EC2 instances running a web application. The DevOps team needs to create a metric filter that parses logs for HTTP status codes (e.g., 4xx and 5xx) and increment a metric. Additionally, they need to create a CloudWatch alarm on the error count. Which of the following are required to achieve this? (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
Define the metric filter pattern to match HTTP status codes in the log entries.
Option A is correct because a metric filter is defined on a log group to extract metrics. Option C is correct because the metric filter pattern must match the log format to extract the status code. Option B (IAM role) is not required because the CloudWatch Logs agent uses credentials from the instance profile. Option D (subscription filter) is for streaming logs to other destinations, not for metric filters. Option E (CloudWatch Agent) is not required; the default CloudWatch Logs agent can send logs.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 an IAM role that allows CloudWatch Logs to read the log data and publish metrics.
Why it's wrong here
No additional IAM role is needed; the instance profile provides necessary permissions.
- ✓
Define the metric filter pattern to match HTTP status codes in the log entries.
Why this is correct
The filter pattern is essential to parse the logs correctly.
Related concept
Static NAT maps one inside address to one outside address.
- ✓
Create a metric filter in CloudWatch Logs on the log group that contains the application logs.
- ✗
Configure a subscription filter to forward the logs to a Lambda function that creates the metric.
Why it's wrong here
Subscription filters are for streaming, not for metric filters.
- ✗
Install the CloudWatch Agent on the EC2 instances to send the logs.
Why it's wrong here
The older CloudWatch Logs agent can also send logs; the CloudWatch Agent is an alternative but not required.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
Monitoring and Logging — This question tests Monitoring and Logging — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Define the metric filter pattern to match HTTP status codes in the log entries. — Option A is correct because a metric filter is defined on a log group to extract metrics. Option C is correct because the metric filter pattern must match the log format to extract the status code. Option B (IAM role) is not required because the CloudWatch Logs agent uses credentials from the instance profile. Option D (subscription filter) is for streaming logs to other destinations, not for metric filters. Option E (CloudWatch Agent) is not required; the default CloudWatch Logs agent can send logs.
What should I do if I get this DOP-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
This DOP-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 DOP-C02 exam.
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