Final answer:
Amazon SQS offers guaranteed delivery of messages, with distinctions between Standard and FIFO Queues in terms of ordering and throughput.
Step-by-step explanation:
Amazon Simple Queue Service (SQS) does guarantee the delivery of messages. SQS offers two types of message queues: Standard Queues, which provide at-least-once delivery, and FIFO Queues that ensure messages are processed exactly once and in the exact order they are sent. While Standard Queues offer unlimited throughput, order of delivery is not guaranteed. However, FIFO Queues provide both guaranteed ordering and delivery, but with some trade-offs in terms of throughput.
Amazon SQS does not guarantee delivery of messages. It follows a best effort model, meaning that it strives to deliver every message, but there is a possibility of some messages being lost. Amazon SQS provides at least once delivery, which means that a message might be delivered multiple times. To avoid message loss, developers can implement mechanisms such as message deduplication and monitoring.