This DOP-C02 practice question tests your understanding of monitoring and logging. 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.
A DevOps team is using Amazon CloudWatch Logs to centralize logs from multiple EC2 instances running a custom application. The team notices that logs are missing from some instances intermittently. The CloudWatch agent configuration is identical across all instances. What is the MOST likely cause of the missing logs?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The CloudWatch Logs agent's state file has become corrupted due to disk full condition
Option B is correct because the CloudWatch agent will stop sending logs if the disk space dedicated to the log buffer is full, which can happen if the destination log group or stream is throttled. Option A is wrong because VPC Flow Logs do not affect CloudWatch Logs. Option C is wrong because IAM roles are typically checked at startup, and intermittent issues are unlikely. Option D is wrong because CPU utilization does not directly cause log loss; the agent prioritizes 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.
✓
The CloudWatch Logs agent's state file has become corrupted due to disk full condition
Why this is correct
If the agent's buffer disk is full, it stops sending logs until space is freed.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
The VPC Flow Logs are consuming all available network bandwidth
Why it's wrong here
VPC Flow Logs do not affect CloudWatch Logs agent performance.
✗
The EC2 instances are running out of CPU credits, causing the agent to skip log batches
Why it's wrong here
CPU credit exhaustion does not cause the agent to skip logs; it may slow down but not stop sending.
✗
The IAM role attached to the instances has been rotated incorrectly
Why it's wrong here
IAM role issues would cause persistent failure, not intermittent.
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.
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: The CloudWatch Logs agent's state file has become corrupted due to disk full condition — Option B is correct because the CloudWatch agent will stop sending logs if the disk space dedicated to the log buffer is full, which can happen if the destination log group or stream is throttled. Option A is wrong because VPC Flow Logs do not affect CloudWatch Logs. Option C is wrong because IAM roles are typically checked at startup, and intermittent issues are unlikely. Option D is wrong because CPU utilization does not directly cause log loss; the agent prioritizes 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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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