I don't honestly / can't understand why people go to ChapGPT to ask for the answers.... if I recall correctly they only consolidated their DB until 2021...

The answer is B la. SNS FIFO topics queue should be used combined with SQS FIFO queue in this case. The question asked for correct order to different event, so asking for SNS fan out here to send to individual SQS. https://docs.aws.amazon.com/sns/latest/dg/fifo-example-use-case.html

AWS does not currently offer FIFO topics for SNS. SNS only supports standard topics, which do not guarantee message order.

Even chat gpt said B

Yes, you can technically do this with SQS FIFO partitioned queue by giving separate group ID's to leaderboard, matchmaking etc but this is not as useful as SNS FIFO and is overkill as no need for storage etc. B is more elegant and concise solution,

Guys, ChatGPT sucks !. Try removing [most voted] from choice B and it will choose D. And if you put [most voted] in front of A, it will select A. LOL !

just know SNS FIFO also can send events or messages cocurrently to many subscribers while maintaining the order it receives. SNS fanout pattern is set in standard SNS which is commonly used to fan out events to large number of subscribers and usually for duplicated messages.

SQS looks like a good idea first, but since we have to send the same message to multiple destination, even if SQS could do it, SNS is much more dedicated to this kind of usage.

My Answer is B https://docs.aws.amazon.com/sns/latest/dg/sns-fifo-topics.html You can use Amazon SNS FIFO (first in, first out) topics with Amazon SQS FIFO queues to provide strict message ordering and message deduplication. The FIFO capabilities of each of these services work together to act as a fully managed service to integrate distributed applications that require data consistency in near-real time. Subscribing Amazon SQS standard queues to Amazon SNS FIFO topics provides best-effort ordering and at least once delivery.

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SQS FIFO maintains the order of the events - Answer is D

It should be the fan-out pattern, and the pattern starts with Amazon SNS FIFO for the orders.

Answer is D. You are so lazy because instead of searching in documentation or your notes, you are asking ChatGPT. Do you really think you will take this exam ? Hint: ask ChatGPT

D is correct (SQS FIFO) Because B can't send event concurrently though it can send in the order of the events

Amazon SNS is a highly available and durable publish-subscribe messaging service that allows applications to send messages to multiple subscribers through a topic. SNS FIFO topics are designed to ensure that messages are delivered in the order in which they are sent. This makes them ideal for situations where message order is important, such as in the case of the company's game system. Option A, Amazon EventBridge event bus, is a serverless event bus service that makes it easy to build event-driven applications. While it supports ordering of events, it does not provide guarantees on the order of delivery.

Option B: send unique events to separate leaderboard, matchmaking, and authentication services concurrently. Concurrently= fan out pattern. Only SQS cannot do a fan out SQS will be consumer for SNS FIFO.

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