Simple Queue Service

You have a fleet of EC2 instances (consumers) managed by an Auto Scaling Group that used to process messages in an SQS Standard Queue. Lately, you have found a lot of messages processed twice and after further investigation, you found that these messages can not be processed successfully. How would you troubleshoot (debug) why these messages fail?

• SQS Standard Queue

• SQS Dead Letter Queue

• SQS Delay Queue

• SQS FIFO Queue

Which SQS Queue type allows your messages to be processed exactly once and in order?

• SQS Standard Queue

• SQS Dead Letter Queue

• SQS Delay Queue

• SQS FIFO Queue

You have 3 different applications that you'd like to send them the same message. All 3 applications are using SQS. What is the best approach would you choose?

• Use SQS Replication Feature

• Use SNS + SQS Fan Out Pattern

• Send messages individually to 3 SQS queues

An e-commerce company uses Amazon SQS queues to decouple their application architecture. The engineering team has observed message processing failures for some customer orders.

As a solutions architect, which of the following solutions would you recommend for handling such message failures?

• Use a dead-letter queue to handle message processing failures

• Use a temporary queue to handle message processing failures

• Use short polling to handle message processing failures

• Use long polling to handle message processing failures

You are working as a Solutions Architect for a photo processing company that has a proprietary algorithm to compress an image without any loss in quality. Because of the efficiency of the algorithm, your clients are willing to wait for a response that carries their compressed images back. You also want to process these jobs asynchronously and scale quickly, to cater to the high demand. Additionally, you also want the job to be retried in case of failures.

Which combination of choices do you recommend to minimize cost and comply with the requirements? (Select two)

• EC2 Spot Instances

• Amazon Simple Queue Service (SQS)

• Amazon Simple Notification Service (SNS)

• EC2 Reserved Instances

• EC2 On-Demand Instances