- A
Create an S3 VPC endpoint and attach a bucket policy that restricts access to that endpoint.
Ensures access only from within the VPC.
- B
Configure a bucket policy that allows access from the public internet.
Why wrong: Does not restrict to VPC.
- C
Make the bucket public and rely on IAM roles.
Why wrong: Public bucket does not restrict access to VPC.
- D
Attach a security group to the S3 bucket.
Why wrong: Security groups cannot be attached to S3 buckets.
Question 1,015 of 1,546
SOA-C02 Reliability and Business Continuity Practice Question
This SOA-C02 practice question tests your understanding of reliability and business continuity. 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 wants to ensure that its S3 bucket is accessible only from a VPC. Which configuration should the SysOps Administrator implement?
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
✓
Create an S3 VPC endpoint and attach a bucket policy that restricts access to that endpoint.
Option A is correct because an S3 VPC endpoint (either gateway or interface type) allows private connectivity between a VPC and S3 without traversing the public internet. By attaching a bucket policy that includes a condition like `aws:SourceVpce` or `aws:SourceVpc`, access is explicitly restricted to traffic originating from that specific VPC endpoint, ensuring the bucket is not accessible from any other network.
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.
- ✓
Create an S3 VPC endpoint and attach a bucket policy that restricts access to that endpoint.
Why this is correct
Ensures access only from within the VPC.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure a bucket policy that allows access from the public internet.
Why it's wrong here
Does not restrict to VPC.
- ✗
Make the bucket public and rely on IAM roles.
Why it's wrong here
Public bucket does not restrict access to VPC.
- ✗
Attach a security group to the S3 bucket.
Why it's wrong here
Security groups cannot be attached to S3 buckets.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think security groups can be applied to S3 buckets (Option D) because they are familiar with security groups for EC2, but S3 operates at the service level and uses bucket policies and IAM for access control, not security groups.
Detailed technical explanation
How to think about this question
An S3 VPC endpoint uses AWS PrivateLink (for interface endpoints) or a gateway endpoint to route traffic within the AWS network. The bucket policy condition `aws:SourceVpce` checks the VPC endpoint ID, while `aws:SourceVpc` checks the VPC ID; using the endpoint ID is more specific and prevents access from other endpoints in the same VPC. In a real-world scenario, this setup is critical for compliance with data residency or security policies that mandate no public internet exposure.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
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Reliability and Business Continuity — study guide chapter
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FAQ
Questions learners often ask
What does this SOA-C02 question test?
Reliability and Business Continuity — This question tests Reliability and Business Continuity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create an S3 VPC endpoint and attach a bucket policy that restricts access to that endpoint. — Option A is correct because an S3 VPC endpoint (either gateway or interface type) allows private connectivity between a VPC and S3 without traversing the public internet. By attaching a bucket policy that includes a condition like `aws:SourceVpce` or `aws:SourceVpc`, access is explicitly restricted to traffic originating from that specific VPC endpoint, ensuring the bucket is not accessible from any other network.
What should I do if I get this SOA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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
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