Simple Queue Service Quiz

A. AWS SQS FIFO
One can use SQS FIFO queues for this purpose. AWS Documentation mentions the following on SQS FIFO Queues:Amazon SQS is a reliable and highly-scalable managed message queue service for storing messages in transit between application components. FIFO queues complement the existing Amazon SQS standard queues, which offer high throughput, best-effort ordering, and at-least-once delivery. FIFO queues have essentially the same features as standard queues, but provide the added benefits of supporting ordering and exactly-once processing. FIFO queues provide additional features that help prevent unintentional duplicates from being sent by message producers or from being received by message consumers. Additionally, message groups allow multiple separate ordered message streams within the same queue. For more information on SQS FIFO Queues, please visit the following URL:
https://aws.amazon.com/about-aws/whats-new/2016/11/amazon-sqs-introduces-fifo-queues-with-exactly-once-processing-and-lower-prices-for-standard-queues/Note:As per AWS, SQS FIFO queues will ensure the delivery of the message only once and it will be delivered in a sequential order. (i.e. First in First Out) where as SNS cannot guarantee the delivery of the message only once.As per AWS SNS FAQ,Q: How many times will a subscriber receive each message?Although most of the time each message will be delivered to your application exactly once, the distributed nature of Amazon SNS and transient network conditions could result in occasional, duplicate messages at the subscriber end.Developers should design their applications such that processing a message more than once does not create any errors or inconsistencies.FIFO FQs states thatUsing SQS FIFO queues will satisfy both the requirements stated in the question.i.e. Duplication of message will not occur and the order of messages will be preserved.