This DVA-C02 practice question tests your understanding of security. 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 developer is configuring cross-account access to an S3 bucket. The bucket in Account A has a bucket policy granting access to an IAM role in Account B. The IAM role's trust policy allows the developer's IAM user in Account B to assume the role. When the developer tries to access the bucket from Account B using the assumed role, they receive an Access Denied error. Which additional step is required to resolve this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Ensure the bucket policy grants the necessary permissions to the IAM role ARN from Account B.
Option A is correct because the S3 bucket policy must grant access to the role ARN in Account B, and the role's trust policy must allow the developer's user to assume it. Option B is wrong because resource-based policies (bucket policy) can grant cross-account access without needing an IAM user in Account A. Option C is wrong because the bucket policy already grants access to the role. Option D is wrong because S3 does not require VPC endpoints for cross-account access.
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.
✗
Add the developer's IAM user ARN to the bucket policy in Account A.
Why it's wrong here
The bucket policy should reference the role, not the user, because the user assumes the role.
✗
Configure a VPC endpoint for S3 in Account A and attach it to the bucket policy.
Why it's wrong here
VPC endpoints are for network-level access, not for cross-account permissions.
✓
Ensure the bucket policy grants the necessary permissions to the IAM role ARN from Account B.
Why this is correct
Cross-account access requires the bucket policy to specify the principal as the IAM role ARN.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create an IAM user in Account A and grant it S3 access, then share the credentials with the developer.
Why it's wrong here
This would bypass the role-based access and is not a best practice.
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.
Security — This question tests Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Ensure the bucket policy grants the necessary permissions to the IAM role ARN from Account B. — Option A is correct because the S3 bucket policy must grant access to the role ARN in Account B, and the role's trust policy must allow the developer's user to assume it. Option B is wrong because resource-based policies (bucket policy) can grant cross-account access without needing an IAM user in Account A. Option C is wrong because the bucket policy already grants access to the role. Option D is wrong because S3 does not require VPC endpoints for cross-account access.
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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