Microsoft Certified: Azure Fundamentals (AZ-900) Practice Exam

Which service is designed specifically for decoupled data transfer in Azure?

1. A Azure Files

2. B Azure Queue

3. C Cosmos DB

4. D Azure Blob Storage

The correct answer is: B Azure Queue

The Azure Queue service is designed explicitly for decoupled data transfer, facilitating the asynchronous communication between different components or services within an application. This service allows messages to be placed into a queue, enabling processes to work independently and at different times. For instance, one application can send messages while another can process them later, fostering greater scalability and flexibility within distributed systems. This decoupling means that the components of the application do not need to be active at the same time, thus improving overall application resilience. Azure Queue is particularly effective in scenarios where you need to buffer requests and handle spikes in workload without immediate synchronization between different application segments. Understanding the nature of messages and queues in Azure further demonstrates the strength of Azure Queue for this use case. Its core functionality includes enabling reliable message delivery, managing message retention, and ensuring that messages can be processed once and only once, which is essential for maintaining consistent system behavior in decoupled architectures.