Microsoft Azure Architect Design (AZ-304) Practice Test

For a sales application requiring asynchronous communication of transaction information, what should you include in your recommendation?

1. Azure Data Lake

2. Azure Notification Hubs

3. Azure Service Fabric

4. Azure Service Bus

The correct answer is: Azure Service Bus

Asynchronous communication in applications is essential for ensuring that transactions are processed without requiring immediate responses, which can improve performance and scalability. Azure Service Bus is specifically designed for this purpose. It provides a reliable and secure way to connect different parts of an application by enabling message queuing. This allows various services or components to communicate with each other without needing to be directly connected or aware of each other’s state. With Azure Service Bus, you can implement features like queues and publish/subscribe messaging patterns, which are fundamental for decoupling the application components. This makes it easier to manage the flow of information, ensures that messages are delivered even if a service is temporarily unavailable, and provides functionality like message sessions and dead-letter queues for more complex scenarios. The other options, while useful for specific use cases, don't align as closely with the requirements of asynchronous communication for transaction processing. For instance, Azure Data Lake is geared towards big data storage and analytics rather than real-time messaging. Azure Notification Hubs focus on sending push notifications to devices rather than facilitating backend communication. Azure Service Fabric could support microservices architecture but isn't primarily intended for messaging and would require more complex setups for asynchronous communication. Thus, the recommendation points clearly to Azure Service Bus for fulfilling the requirements of the