- A
Update the bucket policy to allow the new VPC endpoint ID (the vpce-* value) created by the redeployment.
The bucket policy is pinned to a specific endpoint ID using aws:SourceVpce. Redeploying or recreating the endpoint creates a new endpoint ID, so requests now present a different aws:SourceVpce value. Updating the bucket policy to match the new endpoint ID makes the condition true again while keeping access restricted to that specific private endpoint.
- B
Add internet egress via a NAT Gateway so the requests can reach S3 over the public endpoint.
Why wrong: This would violate the private-only requirement and would not satisfy the aws:SourceVpce condition in the bucket policy, because public routing does not present the same SourceVpce context to S3.
- C
Remove the aws:SourceVpce condition from the bucket policy to ensure the IAM permissions are sufficient.
Why wrong: Removing SourceVpce would broaden access to requests originating outside the intended private connectivity path, including from the public internet, which defeats the stated security requirement.
- D
Update the IAM role to add s3:PutObject permissions so the requests can be authorized.
Why wrong: The requests are failing for GetObject authorization (the action in the bucket policy condition). Adding PutObject permissions does not change the evaluation for s3:GetObject against the bucket policy.
Quick Answer
The answer is to update the bucket policy with the new VPC endpoint ID. When you redeploy an Interface VPC Endpoint for S3, AWS generates a completely new endpoint ID (e.g., vpce-0abc... becomes vpce-9xyz...). The existing bucket policy condition `aws:SourceVpce` still references the old ID, so even though the IAM role and application configuration remain unchanged, the condition fails and S3 returns AccessDenied. On the SAA-C03 exam, this scenario tests your understanding that VPC Endpoint IDs are immutable and that bucket policy conditions are evaluated strictly against the current endpoint. A common trap is assuming IAM permissions alone control access, but the bucket policy’s explicit condition overrides them. Remember: redeploy = new ID, so the policy must match. Memory tip: “New endpoint, new vpce—update the policy, or access will flee.”
SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 wants S3 access to be available only from private connectivity. They created an Interface VPC Endpoint for S3 (that provides private connectivity from their VPC to S3) and configured the application to use it from private subnets. The IAM role allows: - s3:GetObject on arn:aws:s3:::confidential-bucket/reports/* However, requests fail with AccessDenied. The S3 bucket policy includes an allow statement that permits GetObject only if: - aws:SourceVpce equals "vpce-0abc12345def6789" After redeploying the VPC endpoint, the application still uses the same IAM permissions but gets AccessDenied. What change is most likely to fix the issue?
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 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
Update the bucket policy to allow the new VPC endpoint ID (the vpce-* value) created by the redeployment.
Option A is correct because redeploying a VPC Endpoint creates a new endpoint ID (vpce-*). The bucket policy explicitly allows access only if aws:SourceVpce matches the original endpoint ID. Since the new endpoint has a different ID, the condition fails, causing AccessDenied. Updating the bucket policy to reference the new vpce ID restores 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.
- ✓
Update the bucket policy to allow the new VPC endpoint ID (the vpce-* value) created by the redeployment.
Why this is correct
The bucket policy is pinned to a specific endpoint ID using aws:SourceVpce. Redeploying or recreating the endpoint creates a new endpoint ID, so requests now present a different aws:SourceVpce value. Updating the bucket policy to match the new endpoint ID makes the condition true again while keeping access restricted to that specific private endpoint.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Add internet egress via a NAT Gateway so the requests can reach S3 over the public endpoint.
Why it's wrong here
This would violate the private-only requirement and would not satisfy the aws:SourceVpce condition in the bucket policy, because public routing does not present the same SourceVpce context to S3.
- ✗
Remove the aws:SourceVpce condition from the bucket policy to ensure the IAM permissions are sufficient.
Why it's wrong here
Removing SourceVpce would broaden access to requests originating outside the intended private connectivity path, including from the public internet, which defeats the stated security requirement.
- ✗
Update the IAM role to add s3:PutObject permissions so the requests can be authorized.
Why it's wrong here
The requests are failing for GetObject authorization (the action in the bucket policy condition). Adding PutObject permissions does not change the evaluation for s3:GetObject against the bucket policy.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume IAM permissions alone are sufficient, overlooking that bucket policy conditions tied to a specific VPC endpoint ID become invalid after the endpoint is redeployed, causing an AccessDenied even with correct IAM roles.
Detailed technical explanation
How to think about this question
VPC Endpoints for S3 use a unique endpoint ID that is immutable after creation; redeploying generates a new ID. The aws:SourceVpce condition key evaluates the VPC endpoint ID from which the request originates, not the VPC ID. In practice, if an endpoint is deleted and recreated (e.g., during migration or recovery), all bucket policies referencing the old ID must be updated to avoid silent failures.
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 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.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Secure Architectures — This question tests Design Secure Architectures — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Update the bucket policy to allow the new VPC endpoint ID (the vpce-* value) created by the redeployment. — Option A is correct because redeploying a VPC Endpoint creates a new endpoint ID (vpce-*). The bucket policy explicitly allows access only if aws:SourceVpce matches the original endpoint ID. Since the new endpoint has a different ID, the condition fails, causing AccessDenied. Updating the bucket policy to reference the new vpce ID restores access.
What should I do if I get this SAA-C03 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: "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?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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