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Question 27 of 1,616

Development with AWS Services →mediumMultiple ChoiceObjective-mapped

DVA-C02 Development with AWS Services Practice Question

This DVA-C02 practice question tests your understanding of development with aws services. 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 company runs a Node.js application on AWS Elastic Beanstalk. The application writes log files to /var/log/app/. The operations team wants to stream these logs to Amazon CloudWatch Logs for monitoring and alerting. The developer configures the Elastic Beanstalk environment to include a .ebextensions configuration file that sets up the CloudWatch Logs agent. The configuration file specifies the log group and the log stream prefix. After deploying the updated environment, the logs are not appearing in CloudWatch Logs. The developer checks the EC2 instance and confirms that the CloudWatch Logs agent is running and the configuration file is present in /etc/awslogs/. What is the most likely reason the logs are not being sent?

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.

Question 1mediummultiple choice

Full question →

A
The CloudWatch Logs agent configuration file does not specify the correct log file path or the log files do not exist.
Correct: If the path is wrong or files are missing, the agent will not send logs.
B
The CloudWatch Logs agent does not have read permissions on the /var/log/app/ directory.
Why wrong: Incorrect: The agent runs as root, so permissions are not an issue.
C
The .ebextensions configuration file is not executed because it is in the wrong directory.
Why wrong: Incorrect: .ebextensions files are processed by Elastic Beanstalk.
D
The IAM instance profile does not have the necessary permissions to write to CloudWatch Logs.
Why wrong: Incorrect: This would prevent any logs from being sent, but the agent is running, so permissions are likely correct.

Full breakdown with real-world context →

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

✓

The CloudWatch Logs agent configuration file does not specify the correct log file path or the log files do not exist.

Option D is correct because the CloudWatch Logs agent configuration must specify the path to the log files. If the path is incorrect or the log files are not being written, the agent will not send logs. Option A is incorrect because the agent runs as root; permissions to read /var/log/app/ are typically fine. Option B is incorrect because CloudWatch Logs does not require IAM roles to be attached to the instance profile; the instance profile must have proper permissions, but that's separate. Option C is incorrect because the agent configuration can be in the .ebextensions file, and that is a valid method.

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 configuration file does not specify the correct log file path or the log files do not exist.
Why this is correct
Correct: If the path is wrong or files are missing, the agent will not send logs.
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 CloudWatch Logs agent does not have read permissions on the /var/log/app/ directory.
Why it's wrong here
Incorrect: The agent runs as root, so permissions are not an issue.
✗
The .ebextensions configuration file is not executed because it is in the wrong directory.
Why it's wrong here
Incorrect: .ebextensions files are processed by Elastic Beanstalk.
✗
The IAM instance profile does not have the necessary permissions to write to CloudWatch Logs.
Why it's wrong here
Incorrect: This would prevent any logs from being sent, but the agent is running, so permissions are likely correct.

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 DVA-C02 NAT questions on configuration and troubleshooting.

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Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

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FAQ

Questions learners often ask

What does this DVA-C02 question test?

Development with AWS Services — This question tests Development with AWS Services — 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 configuration file does not specify the correct log file path or the log files do not exist. — Option D is correct because the CloudWatch Logs agent configuration must specify the path to the log files. If the path is incorrect or the log files are not being written, the agent will not send logs. Option A is incorrect because the agent runs as root; permissions to read /var/log/app/ are typically fine. Option B is incorrect because CloudWatch Logs does not require IAM roles to be attached to the instance profile; the instance profile must have proper permissions, but that's separate. Option C is incorrect because the agent configuration can be in the .ebextensions file, and that is a valid method.

What should I do if I get this DVA-C02 question wrong?

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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