Which of the following statements about Amazon SQS is true?

Amazon Simple Queue Service (SQS) is designed as a message queuing service that allows decoupling of application components. This means that different parts of an application can communicate with each other without needing to be directly connected. For instance, a producer can send messages to a queue, and a consumer can retrieve those messages independently, allowing for greater flexibility and scalability in application design.

The ability to decouple components is crucial for building resilient and distributed systems, as it helps manage workloads effectively and adapt to varying loads without impacting the overall application's performance. In addition, SQS supports message management features such as delay queues, dead-letter queues, and the ability to process messages at scale, which further enhances its utility in distributed architectures.

The other options do not accurately reflect the characteristics of SQS. It is not a file storage service, does not solely focus on synchronous communication, and is not primarily aimed at real-time data processing, as its purpose is to facilitate communication between application components rather than processing data instantly.