Exam AWS Certified Solutions Architect - Associate SAA-C02 topic 1 question 324 discussion

Answer is A. The details are revealed in below url: https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/FIFO-queues.html FIFO (First-In-First-Out) queues are designed to enhance messaging between applications when the order of operations and events is critical, or where duplicates can't be tolerated. Examples of situations where you might use FIFO queues include the following: To make sure that user-entered commands are run in the right order. To display the correct product price by sending price modifications in the right order. To prevent a student from enrolling in a course before registering for an account.

A message in order - FIFO

Vote A

keyword is "... preserved during processing." SNS does not preserve during processing. SQS service does preserve. You should remove from the queue.

i chose A

A - keyword - "certain sequences"

A is the correct answer

Correct Answer: B Amazon SNS introduces First-in-First-out (FIFO) topics with strict ordering and deduplication of messages. Posted On: Oct 22, 2020 https://aws.amazon.com/about-aws/whats-new/2020/10/amazon-sns-introduces-fifo-topics-with-strict-ordering-and-deduplication-of-messages/ Scernario identifies "lowest possible operating costs." SNS cost $142.24 for: 100 million requests 100 million https notifications 100 million FIFO requests 1Gb Data Transfer Out 1Gb Data Transfer In SQS Cost $231.84 for: 100 million requests 100 million FIFO requests 1Gb Data Transfer Out 1Gb Data Transfer In

A → A message in order—FIFO

B. SNS FIFO topics have been introduced - https://aws.amazon.com/about-aws/whats-new/2020/10/amazon-sns-introduces-fifo-topics-with-strict-ordering-and-deduplication-of-messages/

it should be A

A is ok

101% A; "specific order that must be maintained" so SQS FIFO

I think it’s incomplete. Ok FIFO queue maintains order but SQS doesn’t trigger another service, the same for lambda, they both need something else that trigger them. SNS instead can trigger lambda and not only. Then nothing is asked about decoupling services and processing must be immediate. So I guess C.

A FIFO

A it is

yes its A.