SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
An organization is modernizing a legacy application by breaking it into microservices on AWS. The application processes customer orders and sends notifications. The team wants to decouple the order processing from the notification service to improve scalability. Which AWS service should they use to asynchronously pass messages between the services?
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 Simple Queue Service (Amazon SQS)
Amazon SQS is a fully managed message queue service that enables decoupling of application components. SNS is pub/sub; EventBridge is event bus; Kinesis is for real-time streaming. For simple point-to-point async messaging, SQS is the best fit.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Amazon Kinesis Data Streams
Why it's wrong here
Kinesis Data Streams is a streaming ingestion service requiring consumers to poll shards and manage checkpoints; it does not push messages to a notification service. It suits real-time analytics pipelines, not simple point-to-point decoupling of order and notification microservices.
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Amazon EventBridge
Why it's wrong here
Amazon EventBridge is incorrect because it functions as an event bus, routing events based on rules, rather than a message queuing service for direct asynchronous message passing between application components. The scenario requires messages to be delivered for processing, typically consumed from a queue. EventBridge is tempting as it enables decoupling and asynchronous communication, being ideal for building event-driven architectures where services react to state changes or occurrences from various sources.
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Amazon Simple Notification Service (Amazon SNS)
Why it's wrong here
SNS is a pub/sub fan-out service that pushes to subscribed endpoints; it does not hold messages for a worker to poll and retry, so decoupled order processing lacks durable queueing. SNS suits broadcasting one event to many subscribers, not competing consumers.
- ✓
Amazon Simple Queue Service (Amazon SQS)
Why this is correct
Amazon SQS provides a fully managed queue that decouples producers from consumers, letting the order service enqueue messages while the notification service polls and processes them independently. This asynchronous, pull-based model satisfies the requirement to decouple the services and improve scalability.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAP-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 SAP-C02 exam.