AWS Certified Cloud Practitioner
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Which AWS service or feature should a company use between two microservices to ensure that messages are sent and received in exact order?
Real Exam
Community
RRitesh
A
Amazon Simple Email Service (Amazon SES)
B
Amazon Simple Notification Service (Amazon SNS)
C
Amazon S3 Event Notifications
D
Amazon Simple Queue Service (Amazon SQS) FIFO queues
Explanation:
Explanation
Amazon SQS FIFO (First-In-First-Out) queues are specifically designed to ensure that messages are processed in the exact order they are sent. Here's why:
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FIFO Queues: Guarantee exactly-once processing and preserve the order of messages
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Message Ordering: Messages are delivered and processed in the same order they are sent
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Exactly-Once Processing: Prevents duplicate processing of messages
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Deduplication: Uses message deduplication IDs to ensure no duplicates
Why other options are incorrect:
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Amazon SES: Email service, not for message ordering between microservices
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Amazon SNS: Pub/Sub service that doesn't guarantee message ordering
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Amazon S3 Event Notifications: Event notifications for S3 operations, not designed for ordered message processing between microservices
FIFO queues are the ideal choice for microservices architectures where message ordering is critical, such as financial transactions, order processing, or any workflow that requires sequential processing.
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