The answer is to use Amazon EventBridge cross-account event buses in each target account. This is the most scalable and secure approach because EventBridge natively supports routing events directly to event buses in other AWS accounts using resource-based policies, eliminating the need for intermediary services or custom code. For the AWS Certified Solutions Architect Professional SAP-C02 exam, this scenario tests your understanding of event-driven architecture at scale, where centralized event ingestion must fan out to multiple accounts without introducing bottlenecks or security gaps. A common trap is choosing SNS topics, which lack native cross-account delivery and require complex IAM configurations, or Lambda functions, which add unnecessary invocation overhead and scaling limits. Remember the memory tip: "Buses cross borders" — EventBridge event buses are the only service designed for direct, policy-controlled cross-account event routing, making them the clear choice for secure, serverless scalability.
SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. 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 is designing an event-driven architecture using Amazon EventBridge. They have multiple AWS accounts that need to receive events from a central account. What is the MOST scalable and secure way to route events to these accounts?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Amazon EventBridge cross-account event buses in each target account
Option D is correct because EventBridge cross-account event buses allow events to be sent directly to event buses in other accounts securely and scalably. Option A is incorrect because SNS topics have limited cross-account capabilities. Option B is incorrect because Kinesis Data Streams is not designed for event routing. Option C is incorrect because Lambda functions would require custom invocation logic.
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.
✓
Use Amazon EventBridge cross-account event buses in each target account
Read the scenario before looking for a memorised answer.
✗
Publish events to an AWS Lambda function in each target account
Why it's wrong here
Not scalable and adds complexity.
✗
Use Amazon Kinesis Data Streams with cross-account access
Why it's wrong here
Kinesis is for streaming data, not event routing.
✗
Create an Amazon SNS topic in the central account and subscribe SQS queues in each target account
Why it's wrong here
SNS cross-account is possible but less scalable than EventBridge.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
Identify which SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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: Use Amazon EventBridge cross-account event buses in each target account — Option D is correct because EventBridge cross-account event buses allow events to be sent directly to event buses in other accounts securely and scalably. Option A is incorrect because SNS topics have limited cross-account capabilities. Option B is incorrect because Kinesis Data Streams is not designed for event routing. Option C is incorrect because Lambda functions would require custom invocation logic.
What should I do if I get this SAP-C02 question wrong?
Identify which SAP-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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