SAA-C03 Design Secure Architectures Practice Question
This SAA-C03 practice question tests your understanding of design secure architectures. 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. A key principle to apply: s3 bucket policies use conditions to control access based on request attributes.. 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.
An EC2 instance in a private subnet must access an S3 bucket that contains regulated exports for a financial reporting platform. The security team requires access to be allowed only when traffic comes through a specific VPC endpoint. What should the architect add to the bucket policy? The design must avoid adding custom operational scripts.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
A condition that matches aws:sourceVpce to the endpoint ID
Option D is correct because the bucket policy can use the `aws:sourceVpce` condition key to restrict access to requests originating from a specific VPC endpoint. This ensures that only traffic routed through that endpoint can access the S3 bucket, meeting the security team's requirement without custom scripts.
Key principle: S3 bucket policies use conditions to control access based on request attributes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
A security group rule that allows HTTPS to S3
Why it's wrong here
Security groups do not attach to S3 buckets and cannot enforce S3 bucket access.
✗
A condition that matches aws:RequestedRegion to the bucket Region
Why it's wrong here
RequestedRegion limits API calls by Region but does not prove traffic used the endpoint.
✗
A deny statement for all IAM users except the EC2 role
Why it's wrong here
This controls identity but does not enforce the network path through the endpoint.
✓
A condition that matches aws:sourceVpce to the endpoint ID
Why this is correct
The aws:sourceVpce condition restricts S3 access to requests that arrive through the specified VPC endpoint.
Related concept
S3 bucket policies use conditions to control access based on request attributes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse security group rules (which control instance-level traffic) with bucket policy conditions (which control access to the S3 service), leading them to pick Option A instead of the correct VPC endpoint condition.
Detailed technical explanation
How to think about this question
The `aws:sourceVpce` condition key evaluates the VPC endpoint ID from which the request originates, allowing fine-grained network-level control in S3 bucket policies. This works with Gateway Endpoints for S3, which use prefix lists and route tables to direct traffic, ensuring that requests from the private subnet go through the endpoint without requiring a NAT gateway or internet gateway.
KKey Concepts to Remember
S3 bucket policies use conditions to control access based on request attributes.
The `aws:sourceVpce` condition key restricts S3 access to specific VPC endpoints.
VPC endpoints for S3 are gateway endpoints, not interface endpoints.
Enforcing `aws:sourceVpce` ensures private network access to S3, bypassing the internet.
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
S3 bucket policies use conditions to control access based on request attributes.
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.
Review s3 bucket policies use conditions to control access based on request attributes., then practise related SAA-C03 questions on the same topic to reinforce the concept.
Design Secure Architectures — This question tests Design Secure Architectures — S3 bucket policies use conditions to control access based on request attributes..
What is the correct answer to this question?
The correct answer is: A condition that matches aws:sourceVpce to the endpoint ID — Option D is correct because the bucket policy can use the `aws:sourceVpce` condition key to restrict access to requests originating from a specific VPC endpoint. This ensures that only traffic routed through that endpoint can access the S3 bucket, meeting the security team's requirement without custom scripts.
What should I do if I get this SAA-C03 question wrong?
Review s3 bucket policies use conditions to control access based on request attributes., then practise related SAA-C03 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
S3 bucket policies use conditions to control access based on request attributes.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This SAA-C03 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 SAA-C03 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.