The answer is to define an environment variable in the ECS task definition with the bucket name. This is correct because the environment variable is injected at runtime, keeping the configuration separate from the application code, while the ECS task role (an IAM role) grants the container secure, granular permissions to access the specific S3 bucket without embedding credentials. On the AWS Certified Developer Associate DVA-C02 exam, this scenario tests your understanding of the separation of configuration from code and the principle of least privilege—a common trap is to hardcode the bucket name or store it in the container image, which breaks dynamic configuration and security best practices. Remember the memory tip: "Env vars for config, IAM roles for access"—the environment variable provides the name, but the task role provides the secure permissions, making this the simplest and most secure approach for Fargate.
DVA-C02 Deployment Practice Question
This DVA-C02 practice question tests your understanding of deployment. 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 developer is deploying an application on Amazon ECS using the Fargate launch type. The application needs to read configuration data from an Amazon S3 bucket. How should the developer securely provide the S3 bucket name to the container at runtime?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Define an environment variable in the ECS task definition with the bucket name.
Option B is correct because environment variables in the task definition can include the bucket name, and using IAM roles (task role) ensures secure access. Option A is wrong because hardcoding is insecure. Option C is wrong because storing in the container image is not dynamic. Option D is wrong because storing in a parameter store is good, but environment variables with IAM roles are simpler for this use case.
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.
✓
Define an environment variable in the ECS task definition with the bucket name.
Why this is correct
Environment variables can be set in the task definition and accessed by the container.
Related concept
Read the scenario before looking for a memorised answer.
✗
Hardcode the bucket name in the application code.
Why it's wrong here
Hardcoding is not secure or flexible.
✗
Use AWS Systems Manager Parameter Store and retrieve the bucket name at startup.
Why it's wrong here
This is also valid but more complex; environment variables are simpler.
✗
Store the bucket name in the container image's environment file.
Why it's wrong here
Storing in the image is not dynamic and requires image rebuild.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Define an environment variable in the ECS task definition with the bucket name. — Option B is correct because environment variables in the task definition can include the bucket name, and using IAM roles (task role) ensures secure access. Option A is wrong because hardcoding is insecure. Option C is wrong because storing in the container image is not dynamic. Option D is wrong because storing in a parameter store is good, but environment variables with IAM roles are simpler for this use case.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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