- A
AWS AppSync
Why wrong: AWS AppSync is a service for building GraphQL APIs; it does not handle decoupling of microservices or asynchronous communication in an event-driven architecture.
- B
Amazon Simple Notification Service (SNS)
Why wrong: Amazon SNS is a pub/sub notification service used for fan-out messaging; it does not provide a message queue for decoupling microservices.
- C
Amazon Kinesis Data Streams
Why wrong: Amazon Kinesis Data Streams is designed for real-time streaming of large data; it is not the best fit for simple decoupling of microservices.
- D
Amazon EventBridge
Amazon EventBridge enables event-driven architectures by routing events between sources and targets; it is a correct choice for decoupling and asynchronous communication.
- E
Amazon Simple Queue Service (SQS)
Amazon SQS provides a fully managed message queue for decoupling microservices and handling asynchronous communication; it is a correct choice.
SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
This SAP-C02 practice question tests your understanding of accelerate workload migration and modernization. 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 modernizing its monolithic Java application to a microservices architecture on AWS. The application uses a shared Oracle database. The team wants to implement an event-driven architecture. Which TWO AWS services should be used to decouple microservices and handle asynchronous communication?
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
Amazon EventBridge
Correct answers are D (Amazon EventBridge) and E (Amazon Simple Queue Service - SQS). SQS provides a reliable message queue for decoupling microservices and enabling asynchronous communication. EventBridge allows building event-driven architectures by routing events from various sources to targets. Option A (AWS AppSync) is for building GraphQL APIs; it does not handle decoupling in an event-driven pattern. Option B (Amazon SNS) is a pub/sub notification service but not primarily for decoupling queues; it can be used for fan-out but not as a queue. Option C (Amazon Kinesis Data Streams) is for real-time streaming data; it is not typically used for simple decoupling of microservices.
Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS AppSync
Why it's wrong here
AWS AppSync is a service for building GraphQL APIs; it does not handle decoupling of microservices or asynchronous communication in an event-driven architecture.
- ✗
Amazon Simple Notification Service (SNS)
Why it's wrong here
Amazon SNS is a pub/sub notification service used for fan-out messaging; it does not provide a message queue for decoupling microservices.
- ✗
Amazon Kinesis Data Streams
Why it's wrong here
Amazon Kinesis Data Streams is designed for real-time streaming of large data; it is not the best fit for simple decoupling of microservices.
- ✓
Amazon EventBridge
Why this is correct
Amazon EventBridge enables event-driven architectures by routing events between sources and targets; it is a correct choice for decoupling and asynchronous communication.
Related concept
Standard ACLs match source addresses.
- ✓
Amazon Simple Queue Service (SQS)
Why this is correct
Amazon SQS provides a fully managed message queue for decoupling microservices and handling asynchronous communication; it is a correct choice.
Related concept
Standard ACLs match source addresses.
Common exam traps
Common exam trap: ACLs stop at the first match
ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.
Detailed technical explanation
How to think about this question
ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.
KKey Concepts to Remember
- Standard ACLs match source addresses.
- Extended ACLs can match source, destination, protocol and ports.
- The first matching ACL entry is used.
- There is usually an implicit deny at the end.
TExam Day Tips
- Check inbound versus outbound direction.
- Read the ACL from top to bottom.
- Look for a broader permit or deny above the intended line.
Key takeaway
ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SAP-C02 ACL questions on filtering logic and placement.
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Accelerate Workload Migration and Modernization — This question tests Accelerate Workload Migration and Modernization — Standard ACLs match source addresses..
What is the correct answer to this question?
The correct answer is: Amazon EventBridge — Correct answers are D (Amazon EventBridge) and E (Amazon Simple Queue Service - SQS). SQS provides a reliable message queue for decoupling microservices and enabling asynchronous communication. EventBridge allows building event-driven architectures by routing events from various sources to targets. Option A (AWS AppSync) is for building GraphQL APIs; it does not handle decoupling in an event-driven pattern. Option B (Amazon SNS) is a pub/sub notification service but not primarily for decoupling queues; it can be used for fan-out but not as a queue. Option C (Amazon Kinesis Data Streams) is for real-time streaming data; it is not typically used for simple decoupling of microservices.
What should I do if I get this SAP-C02 question wrong?
Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related SAP-C02 ACL questions on filtering logic and placement.
What is the key concept behind this question?
Standard ACLs match source addresses.
About these practice questions
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Last reviewed: Jun 20, 2026
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