- A
Create a resource share in AWS Resource Access Manager (RAM) for the shared VPC subnets.
AWS RAM allows sharing subnets with other accounts in the organization.
- B
Attach a transit gateway to the shared VPC and to each business unit's VPC.
A transit gateway enables transitive routing between VPCs while maintaining isolation.
- C
Configure VPC endpoints in each business unit VPC to access the shared VPC.
Why wrong: VPC endpoints are for accessing AWS services, not for inter-VPC connectivity.
- D
Create VPC peering connections between the shared VPC and each business unit's VPC.
Why wrong: VPC peering does not support transitive routing, making it difficult to scale.
- E
Use AWS PrivateLink to connect the business unit VPCs to the shared VPC.
Why wrong: PrivateLink is for accessing services, not for connecting VPCs.
Quick Answer
The answer is to attach a transit gateway to the shared VPC and to each business unit’s VPC, combined with sharing subnets via AWS Resource Access Manager (RAM). This is correct because VPC sharing with AWS RAM allows a centrally owned VPC to share its subnets with other accounts in an AWS Organization, enabling business units to launch resources directly into those shared subnets while the VPC’s core networking—such as route tables, NAT gateways, and security groups—remains centrally managed. On the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of how to balance centralized control with delegated resource creation, often appearing as a multi-answer question where a common trap is to confuse VPC peering or a single shared VPC without a transit gateway for cross-VPC connectivity. The key insight is that VPC sharing provides network isolation through separate security groups and NACLs per account, while the transit gateway enables secure routing between the shared VPC and each business unit’s own VPC. Memory tip: think “RAM for subnets, TGW for connectivity” to keep the two steps distinct.
SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. 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 is designing a multi-account AWS environment using AWS Organizations. The company has several business units that each require their own VPC in shared accounts managed centrally. The company wants to enable VPC sharing to allow business units to create resources in shared subnets while maintaining network isolation. Which combination of steps should the company take to achieve this? (Choose TWO.)
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 resource share in AWS Resource Access Manager (RAM) for the shared VPC subnets.
Option A is correct because AWS Resource Access Manager (RAM) allows you to share subnets from a centrally owned VPC with other AWS accounts within your AWS Organization. This enables business units to launch resources directly into the shared subnets while the VPC and its networking configuration remain managed centrally, ensuring network isolation through separate security groups and network ACLs.
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 resource share in AWS Resource Access Manager (RAM) for the shared VPC subnets.
Why this is correct
AWS RAM allows sharing subnets with other accounts in the organization.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Attach a transit gateway to the shared VPC and to each business unit's VPC.
Why this is correct
A transit gateway enables transitive routing between VPCs while maintaining isolation.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Configure VPC endpoints in each business unit VPC to access the shared VPC.
Why it's wrong here
VPC endpoints are for accessing AWS services, not for inter-VPC connectivity.
- ✗
Create VPC peering connections between the shared VPC and each business unit's VPC.
Why it's wrong here
VPC peering does not support transitive routing, making it difficult to scale.
- ✗
Use AWS PrivateLink to connect the business unit VPCs to the shared VPC.
Why it's wrong here
PrivateLink is for accessing services, not for connecting VPCs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse VPC sharing (which uses RAM to share subnets for resource creation) with network connectivity solutions like transit gateway, VPC peering, or PrivateLink, which are used for routing traffic between VPCs rather than enabling cross-account resource deployment in shared subnets.
Detailed technical explanation
How to think about this question
VPC sharing leverages AWS RAM to share subnets with other accounts in the same AWS Organization, allowing participants to create resources such as EC2 instances, RDS databases, and Lambda functions directly in the shared subnets. The owner retains full control over the VPC's routing, security groups, and network ACLs, while each participant account applies its own security groups and maintains resource-level isolation. This approach avoids the complexity of VPC peering or transit gateways for simple subnet sharing scenarios.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Design for New Solutions — This question tests Design for New Solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a resource share in AWS Resource Access Manager (RAM) for the shared VPC subnets. — Option A is correct because AWS Resource Access Manager (RAM) allows you to share subnets from a centrally owned VPC with other AWS accounts within your AWS Organization. This enables business units to launch resources directly into the shared subnets while the VPC and its networking configuration remain managed centrally, ensuring network isolation through separate security groups and network ACLs.
What should I do if I get this SAP-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: Jun 11, 2026
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