AWS Certified Developer – Quiz- 615 QUESTIONS- 167 PAGES – QUESTIONS AND ANSWERS

AWS SQS long polling allows the SQS service to wait until a message is available in the queue before sending a response? CORRECT ANSWERS: true A visibility timeout is a period of time during which AWS SQS prevents other consuming components from receiving and processing the message? CORRECT ANSWERS: true What AWS service can you use to "fan out" SQS messages to multiple queues? CORRECT ANSWERS: SNS (SQS) What is the maximum long poll timeout? CORRECT ANSWERS: 20 seconds You have a fleet of EC2 instances that are constantly polling empty SQS queues which is burning CPU complete cycles. What should you do? CORRECT ANSWERS: Enable SQS long polling What is the default SQS visibility time out? CORRECT ANSWERS: 30 seconds EC2 instances download jobs from SQS queue, but are taking too long to process. What api call can you use to the length of time to process jobs? CORRECT ANSWERS: ChangeMessageVisibility (SQS) You are designing a new app which processes payments and delivers promotional emails to customers. Your need to ensure that the payment process takes priority over the creation of emails. What is the best way to achieve this? CORRECT ANSWERS: Use 2 SQS queues. Poll that payment queue first. An SQS message can NOT be delivered multiple times? CORRECT ANSWERS: False, SQS messages can be delivered multiple times What is the default visibility timeout for SQS? CORRECT ANSWERS: 30 seconds How long can SQS messages be? CORRECT ANSWERS: Messages can contain up to 256 KB of text in any format SQS was the second service on AWS? CORRECT ANSWERS: False, SQS was the first DynomaDB writes are measured in 2 KB per write? CORRECT ANSWERS: False, they are measured in 1 KB per write. What are the two consistency models used when reading data from DynamoDB? CORRECT ANSWERS: Eventually Consistent and Strongly consistent DynamoDB is a NoSQL database by AWS? CORRECT ANSWERS: True