SAP-C02 Design for New Solutions Practice Question
This SAP-C02 practice question tests your understanding of design for new solutions. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 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?
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.
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.
✗
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.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often 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.
Detailed technical explanation
How to think about this question
SQS uses a distributed message store that replicates messages across multiple AZs for durability, with a default retention period of 4 days (configurable up to 14 days). It supports two queue types: standard queues (high throughput, at-least-once delivery) and FIFO queues (exactly-once processing, message ordering). Under the hood, SQS employs a polling model where consumers must actively poll the queue, enabling back-pressure and fault tolerance, which is ideal for decoupled microservices that need to handle variable workloads.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: 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.
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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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.
Question Discussion
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