- A
Create a VPC Gateway Endpoint for S3.
Gateway Endpoints are free and provide private access to S3.
- B
Attach an endpoint policy that allows access to the specific S3 bucket.
The endpoint policy controls access to S3 via the endpoint.
- C
Create a VPC Interface Endpoint for S3.
Why wrong: Interface Endpoints for S3 are not supported in all regions and cost more.
- D
Update the route table for the private subnets to include a route to the S3 endpoint.
Route tables must have a route to the endpoint prefix list.
- E
Create a NAT Gateway in the public subnet.
Why wrong: NAT Gateway is not cost-effective and would route traffic over the internet.
Question 1,294 of 1,705
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. 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 company has a VPC with public and private subnets. The public subnet has a NAT Gateway. The private subnet instances need to access an S3 bucket in the same region. Which THREE steps should the network engineer take to ensure the most cost-effective and secure access without traversing the internet?
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.
Option A is correct because a VPC Gateway Endpoint for S3 provides private, cost-effective access to S3 without traversing the internet or requiring a NAT Gateway. It uses AWS's internal network and route table entries to direct S3 traffic through the endpoint, avoiding data transfer costs and improving security.
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 a VPC Gateway Endpoint for S3.
Why this is correct
Gateway Endpoints are free and provide private access to S3.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Attach an endpoint policy that allows access to the specific S3 bucket.
Why this is correct
The endpoint policy controls access to S3 via the endpoint.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a VPC Interface Endpoint for S3.
Why it's wrong here
Interface Endpoints for S3 are not supported in all regions and cost more.
- ✓
Update the route table for the private subnets to include a route to the S3 endpoint.
Why this is correct
Route tables must have a route to the endpoint prefix list.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a NAT Gateway in the public subnet.
Common exam traps
Common exam trap: answer the scenario, not the keyword
AWS often tests the misconception that Interface Endpoints are required for all AWS services, but for S3 and DynamoDB, Gateway Endpoints are the correct, cost-effective choice, and candidates may incorrectly select Interface Endpoints due to familiarity with other services.
Detailed technical explanation
How to think about this question
VPC Gateway Endpoints use prefix lists and route table entries to route S3 traffic through AWS's private network, leveraging the S3 service's regional endpoint (e.g., s3.us-east-1.amazonaws.com). Unlike Interface Endpoints, Gateway Endpoints do not require Elastic Network Interfaces or incur hourly charges, making them ideal for high-volume S3 access. The endpoint policy can be scoped to specific buckets and actions, providing granular security without complex IAM roles.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Implementation — This question tests Network Implementation — 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. — Option A is correct because a VPC Gateway Endpoint for S3 provides private, cost-effective access to S3 without traversing the internet or requiring a NAT Gateway. It uses AWS's internal network and route table entries to direct S3 traffic through the endpoint, avoiding data transfer costs and improving security.
What should I do if I get this ANS-C01 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: Jun 30, 2026
This ANS-C01 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 ANS-C01 exam.
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