- A
Amazon SQS
Decouples components via message queues.
- B
Amazon SNS
Pub/sub messaging for decoupling.
- C
AWS Lambda
Why wrong: Compute service, not messaging.
- D
Amazon MQ
Why wrong: Managed broker, but SQS/SNS are more common for decoupling.
- E
Amazon Kinesis Data Streams
Why wrong: Designed for real-time data streaming, not simple messaging.
Question 570 of 1,616
Which AWS Services Enable Decoupled Messaging Between Microservices?
This DVA-C02 practice question tests your understanding of development with aws services. 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.
Which TWO AWS services can be used to send messages between microservices in a decoupled manner? (Choose two.)
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 is a fully managed message queuing service that enables you to decouple and scale microservices, serverless applications, and distributed systems. It allows microservices to send, store, and receive messages between software components at any volume, without losing messages or requiring other services to be available. By using SQS queues, producers and consumers can operate independently, ensuring fault tolerance and asynchronous communication.
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 SQS
Why this is correct
Decouples components via message queues.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Amazon SNS
Why this is correct
Pub/sub messaging for decoupling.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
AWS Lambda
Why it's wrong here
Compute service, not messaging.
- ✗
Amazon MQ
Why it's wrong here
Managed broker, but SQS/SNS are more common for decoupling.
- ✗
Amazon Kinesis Data Streams
Why it's wrong here
Designed for real-time data streaming, not simple messaging.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS Lambda (a compute service) with a messaging service, or think Amazon Kinesis Data Streams is suitable for simple message passing between microservices, when it is actually designed for real-time data streaming and analytics.
Detailed technical explanation
How to think about this question
SQS provides two types of queues: standard (high throughput, at-least-once delivery) and FIFO (first-in-first-out, exactly-once processing). Under the hood, SQS uses a distributed, replicated architecture to ensure durability and availability, with a default message retention period of 4 days (configurable up to 14 days). In a real-world scenario, an e-commerce order processing system might use SQS to decouple the order placement service from the inventory and shipping services, allowing each to scale independently and handle failures gracefully.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
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.
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Development with AWS Services — This question tests Development with AWS Services — 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 is a fully managed message queuing service that enables you to decouple and scale microservices, serverless applications, and distributed systems. It allows microservices to send, store, and receive messages between software components at any volume, without losing messages or requiring other services to be available. By using SQS queues, producers and consumers can operate independently, ensuring fault tolerance and asynchronous communication.
What should I do if I get this DVA-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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Last reviewed: Jul 4, 2026
This DVA-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 DVA-C02 exam.
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