SAA-C03 · Question #440
SAA-C03 Question #440: Real Exam Question with Answer & Explanation
The correct answer is B: Amazon Simple Notification Service (Amazon SNS) FIFO topics. The requirement is an event-driven pub/sub system that guarantees ordered delivery of events. Amazon SNS FIFO topics provide the publish-subscribe model along with FIFO (First-In-First- Out) delivery and exactly-once message processing, ensuring ordered delivery to multiple Optio
Question
A company is building a gaming application that needs to send unique events to multiple leaderboards, player matchmaking systems, and authentication services concurrently. The company requires an AWS-based event-driven system that delivers events in order and supports a publish-subscribe model. The gaming application must be the publisher, and the leaderboards, matchmaking systems, and authentication services must be the subscribers. Which solution will meet these requirements?
Options
- AAmazon EventBridge event buses
- BAmazon Simple Notification Service (Amazon SNS) FIFO topics
- CAmazon Simple Notification Service (Amazon SNS) standard topics
- DAmazon Simple Queue Service (Amazon SQS) FIFO queues
Explanation
The requirement is an event-driven pub/sub system that guarantees ordered delivery of events. Amazon SNS FIFO topics provide the publish-subscribe model along with FIFO (First-In-First- Out) delivery and exactly-once message processing, ensuring ordered delivery to multiple Option A, EventBridge, provides event buses but does not guarantee event ordering across multiple subscribers. Option C (SNS standard topics) provides pub/sub but without ordering guarantees. Option D (SQS FIFO queues) guarantees order but are point-to-point queues, not pub/sub. Thus, Amazon SNS FIFO topics meet the requirements for ordered pub/sub messaging.
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