SAP-C02 Design for New Solutions Practice Question
A company is designing a new microservices architecture on AWS. They need to ensure that services can communicate asynchronously without tight coupling. Which AWS service should they use to decouple the services while providing durable message storage?
⚠ Common exam trap
It's easy for candidates to confuse Amazon SNS (pub/sub) with SQS (queue), overlooking that SNS does not provide durable message storage or consumer-driven polling, which are essential for decoupled 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 SQS
Amazon SQS (Simple Queue Service) is the correct choice because it provides a fully managed message queue that enables asynchronous communication between microservices, decoupling them so that producers and consumers operate independently. SQS offers durable message storage by persisting messages across multiple Availability Zones, ensuring messages are not lost even if a consumer fails. This aligns with the requirement for loose coupling and reliable message delivery.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon SNS
Why it's wrong here
SNS is a pub/sub service, not a queue for decoupling with durable storage.
- ✗
Amazon EventBridge
Why it's wrong here
EventBridge is an event bus for routing events, not a message queue.
- ✗
Amazon Kinesis Data Streams
Why it's wrong here
Kinesis Data Streams is for real-time streaming, not typical message queuing with individual message consumption.
- ✓
Amazon SQS
Why this is correct
SQS provides a fully managed message queue that decouples microservices with durable, scalable message storage.
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 |
Go deeper
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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.