- A
Attach an Internet Gateway to the private subnet.
Why wrong: Incorrect because private subnets should not have direct internet access.
- B
Create a VPC Gateway Endpoint for S3 in the private subnet's route table.
Correct because a Gateway Endpoint provides secure, private access to S3.
- C
Use a VPC peering connection to an S3 bucket.
Why wrong: Incorrect because VPC peering does not connect to S3.
- D
Create a NAT Gateway in the public subnet and route traffic through it.
Why wrong: Incorrect because it uses the internet and is less secure than a VPC endpoint.
Question 335 of 1,546
VPC Gateway Endpoint for S3: Secure Private Subnet Access
This SOA-C02 practice question tests your understanding of networking and content delivery. 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 SysOps Administrator is configuring a VPC with a public subnet and a private subnet. The public subnet has an Internet Gateway. An EC2 instance in the private subnet needs to access an S3 bucket. What is the MOST secure way to provide this access?
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 a VPC Gateway Endpoint for S3 in the private subnet's route table.
Option B is correct because a VPC Gateway Endpoint for S3 allows instances in a private subnet to access S3 privately without traversing the internet, using AWS's internal network. This is the most secure method as it avoids exposing the private subnet to the public internet or requiring a NAT Gateway, and it leverages AWS PrivateLink for direct, low-latency connectivity.
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.
- ✗
Attach an Internet Gateway to the private subnet.
Why it's wrong here
Incorrect because private subnets should not have direct internet access.
- ✓
Create a VPC Gateway Endpoint for S3 in the private subnet's route table.
Why this is correct
Correct because a Gateway Endpoint provides secure, private access to S3.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use a VPC peering connection to an S3 bucket.
Why it's wrong here
Incorrect because VPC peering does not connect to S3.
- ✗
Create a NAT Gateway in the public subnet and route traffic through it.
Why it's wrong here
Incorrect because it uses the internet and is less secure than a VPC endpoint.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse VPC Gateway Endpoints with Interface Endpoints or assume a NAT Gateway is required for all outbound traffic, not realizing that S3 can be accessed privately via a Gateway Endpoint without internet connectivity.
Detailed technical explanation
How to think about this question
A VPC Gateway Endpoint for S3 uses prefix lists in the route table to direct S3 traffic (destined for the S3 service's IP range) through the endpoint, which is horizontally scaled and highly available. Under the hood, it modifies the route table to send traffic to the endpoint's elastic network interface, and the endpoint uses AWS's internal infrastructure to resolve S3 DNS names to private IPs, ensuring traffic never leaves the AWS backbone. In real-world scenarios, this is critical for compliance requirements like HIPAA or PCI DSS, where data must not traverse the public internet.
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.
Visual reference
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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Networking and Content Delivery — study guide chapter
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FAQ
Questions learners often ask
What does this SOA-C02 question test?
Networking and Content Delivery — This question tests Networking and Content Delivery — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a VPC Gateway Endpoint for S3 in the private subnet's route table. — Option B is correct because a VPC Gateway Endpoint for S3 allows instances in a private subnet to access S3 privately without traversing the internet, using AWS's internal network. This is the most secure method as it avoids exposing the private subnet to the public internet or requiring a NAT Gateway, and it leverages AWS PrivateLink for direct, low-latency connectivity.
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.
About these practice questions
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Last reviewed: Jul 4, 2026
This SOA-C02 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 SOA-C02 exam.
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