- A
Use the FireLens log driver to route logs to Fluent Bit and then to the tool
FireLens allows log routing and transformation without code changes.
- B
Use the awslogs log driver and configure a JSON output format
Why wrong: awslogs driver does not support JSON output transformation.
- C
Install the CloudWatch Logs agent on the container
Why wrong: Fargate does not allow installing agents on the host.
- D
Modify the application to output logs in JSON format
Why wrong: Requires code change, which is not desired.
Question 432 of 1,616
Convert ECS Fargate Logs to JSON with FireLens | AWS Developer Associate Explained
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 containerized application on Amazon ECS with Fargate. The application writes logs to stdout. The operations team wants to send these logs to a centralized log management tool that requires logs in JSON format. What is the BEST way to achieve this without modifying application code?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
✓
Use the FireLens log driver to route logs to Fluent Bit and then to the tool
FireLens is an ECS log driver that integrates with Fluent Bit or Fluentd to route, filter, and transform container logs without modifying application code. By using FireLens with Fluent Bit, you can configure a JSON parser to convert stdout logs into JSON format before forwarding them to the centralized log management tool, meeting the requirement exactly.
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.
- ✓
Use the FireLens log driver to route logs to Fluent Bit and then to the tool
Why this is correct
FireLens allows log routing and transformation without code changes.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use the awslogs log driver and configure a JSON output format
Why it's wrong here
awslogs driver does not support JSON output transformation.
- ✗
Install the CloudWatch Logs agent on the container
Why it's wrong here
Fargate does not allow installing agents on the host.
- ✗
Modify the application to output logs in JSON format
Why it's wrong here
Requires code change, which is not desired.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume the awslogs log driver can format logs as JSON (it cannot) or that installing an agent on Fargate containers is possible (it is not), leading them to overlook FireLens as the only serverless-compatible, code-free option for log transformation and routing.
Trap categories for this question
Command / output trap
awslogs driver does not support JSON output transformation.
Detailed technical explanation
How to think about this question
FireLens uses a custom log driver that runs a Fluent Bit sidecar container on the same Fargate task, allowing you to define complex log processing pipelines via configuration files (e.g., parsers, filters, and outputs). Under the hood, Fluent Bit can parse unstructured stdout logs using regex or the built-in 'json' parser, then forward structured JSON to destinations like HTTP endpoints, Kafka, or third-party tools via plugins. A real-world scenario is when legacy applications emit plain-text logs and you need to integrate with a SIEM system that only accepts structured JSON, making FireLens a zero-code solution.
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 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
Got this wrong? Here's your next step.
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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 — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use the FireLens log driver to route logs to Fluent Bit and then to the tool — FireLens is an ECS log driver that integrates with Fluent Bit or Fluentd to route, filter, and transform container logs without modifying application code. By using FireLens with Fluent Bit, you can configure a JSON parser to convert stdout logs into JSON format before forwarding them to the centralized log management tool, meeting the requirement exactly.
What should I do if I get this DVA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This DVA-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 DVA-C02 exam.
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