- A
Amazon Route 53
Why wrong: Route 53 is DNS; it does not decouple microservices.
- B
Amazon EventBridge
EventBridge enables event-driven architectures, decoupling producers from consumers.
- C
Elastic Load Balancing
Why wrong: ELB distributes traffic, but does not decouple services; it still requires direct synchronous communication.
- D
Amazon CloudWatch
Why wrong: CloudWatch is for monitoring and logging, not for decoupling components.
- E
Amazon SQS
SQS decouples microservices by allowing them to communicate asynchronously via queues.
Question 34 of 1,616
Decoupling Microservices with EventBridge and SQS
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 decouple components of a microservices architecture?
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
Amazon EventBridge (Option B) is correct because it provides a serverless event bus that decouples microservices by allowing them to communicate asynchronously via events. Services publish events to EventBridge, and other services consume them without direct coupling, enabling loose coupling and scalability.
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 Route 53
Why it's wrong here
Route 53 is DNS; it does not decouple microservices.
- ✓
Amazon EventBridge
Why this is correct
EventBridge enables event-driven architectures, decoupling producers from consumers.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Elastic Load Balancing
Why it's wrong here
ELB distributes traffic, but does not decouple services; it still requires direct synchronous communication.
- ✗
Amazon CloudWatch
Why it's wrong here
CloudWatch is for monitoring and logging, not for decoupling components.
- ✓
Amazon SQS
Why this is correct
SQS decouples microservices by allowing them to communicate asynchronously via queues.
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 Elastic Load Balancing (a synchronous traffic distributor) with asynchronous decoupling services, or mistakenly think Route 53's routing capabilities can decouple services, when in fact only message/event-based services like SQS and EventBridge achieve true decoupling.
Detailed technical explanation
How to think about this question
EventBridge uses a default event bus or custom event buses with rules that filter and route events to targets like AWS Lambda, SQS, or Step Functions, enabling event-driven architectures. Under the hood, EventBridge leverages CloudWatch Events infrastructure but adds schema discovery and registry for event structure validation, which is critical for maintaining contract compatibility between microservices in production.
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 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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
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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 EventBridge — Amazon EventBridge (Option B) is correct because it provides a serverless event bus that decouples microservices by allowing them to communicate asynchronously via events. Services publish events to EventBridge, and other services consume them without direct coupling, enabling loose coupling and scalability.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on DVA-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A service needs loosely coupled asynchronous communication where one producer sends events to many different AWS service targets using rules. Which service fits best?
medium- A.Amazon EFS
- B.AWS CloudHSM
- ✓ C.Amazon EventBridge
- D.AWS DataSync
Why C: Amazon EventBridge is a serverless event bus service that enables loosely coupled asynchronous communication. It allows a single producer to publish events, and then uses rules to route those events to multiple AWS service targets (e.g., Lambda, SQS, Step Functions) simultaneously, fulfilling the requirement exactly.
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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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