Question 1,160 of 724
DVA-C02 Development with AWS Services Practice Question
A service needs loosely coupled asynchronous communication where one producer sends events to many different AWS service targets using rules. Which service fits best?
⚠ Common exam trap
Candidates often confuse Amazon EventBridge with Amazon SNS (Simple Notification Service), but the question explicitly mentions 'rules' to filter events, which is a core EventBridge feature, whereas SNS uses topic subscriptions without rule-based filtering.
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 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.
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 EFS
Why it's wrong here
Amazon EFS (Elastic File System) provides scalable, shared file storage for EC2 instances and on-premises servers, acting as a network file system. While services could technically communicate by writing and reading files, this method introduces tight coupling and is inherently synchronous or polling-based, not an event-driven or message-based asynchronous communication pattern. It lacks the built-in mechanisms for event routing or message queuing that enable true loose coupling between distinct application components.
- ✗
AWS CloudHSM
Why it's wrong here
AWS CloudHSM offers dedicated hardware security modules (HSMs) in the AWS cloud for cryptographic operations and secure key storage. Its primary function is to provide FIPS 140-2 Level 3 validated security for sensitive data and cryptographic keys, ensuring compliance and enhanced security. CloudHSM has no functionality for inter-service communication, asynchronous messaging, or event routing, making it entirely unsuitable for facilitating loosely coupled asynchronous communication between application services.
- ✓
Amazon EventBridge
Why this is correct
Amazon EventBridge is a serverless event bus service that enables building event-driven architectures by routing events from various sources to targets. It inherently supports loosely coupled asynchronous communication by allowing event producers to publish events without direct knowledge of their consumers, and consumers to subscribe to events without knowing the producers. This abstraction ensures that services can evolve independently, enhancing resilience and scalability as events are processed asynchronously.
- ✗
AWS DataSync
Why it's wrong here
AWS DataSync is a data transfer service designed to simplify, automate, and accelerate moving large amounts of data between on-premises storage systems and AWS storage services, or between different AWS storage services. Its purpose is bulk data migration and synchronization, not real-time, event-driven, or message-based asynchronous communication between application components. DataSync focuses on moving files or objects efficiently, which is distinct from the messaging or event routing required for loosely coupled inter-service communication.
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 |
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Last reviewed: Jun 11, 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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