RELIABLE AWS-DEVOPS EXAM CRAM - FREE AWS-DEVOPS DUMPS

Reliable AWS-DevOps Exam Cram - Free AWS-DevOps Dumps

Reliable AWS-DevOps Exam Cram - Free AWS-DevOps Dumps

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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q245-Q250):

NEW QUESTION # 245
Your firm has uploaded a large amount of aerial image data to S3. In the past, in your on-premises environment, you used a dedicated group of servers to process this data and used Rabbit MQ - An open source messaging system to get job information to the servers. Once processed the data would go to tape and be shipped offsite. Your manager told you to stay with the current design, and leverage AWS archival storage and messaging services to minimize cost. Which is correct?

  • A. Use SNS topassjob messages use Cloud Watch alarms to terminate spot worker instanceswhen they become idle. Once data is processed, change the storage class of theS3 object to Glacier.
  • B. UseSQS for passing job messages. Use Cloud Watch alarms to terminate EC2 workerinstances when they become idle. Once data is processed, change the storageclass of the S3 objects to Reduced Redundancy Storage.
  • C. SetupAuto-Scaled workers triggered by queue depth that use spot instances to processmessages in SQS.
    Once data is processed, change the storage class of the S3objects to Glacier C- Changethe storage class of the S3 objects to Reduced Redundancy Storage. SetupAuto-Scaled workers triggered by queue depth that use spot instances to processmessages in SQS. Once data is processed, change the storage class of the S3objects to Glacier.

Answer: C

Explanation:
Explanation
The best option for reduces costs is Glacier, since anyway in the on-premise location everything was stored on tape. Hence option A is out.
Next SQS should be used, since RabbitMG was used internally. Hence option D is out.
The first step is to leave the objects in S3 and not tamper with that. Hence option B is more suited.
The following diagram shows how SQS is used in a worker span environment

For more information on SQS queues, please visit the below URL
http://docs.ws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-how-it-works.html


NEW QUESTION # 246
After reviewing the last quarter's monthly bills, management has noticed an increase in the overall bill from Amazon. After researching this increase in cost, you discovered that one of your new services is doing a lot of GET Bucket API calls to Amazon S3 to build a metadata cache of all objects in the applications bucket. Your boss has asked you to come up with a new cost-effective way to help reduce the amount of these new GET Bucket API calls. What process should you use to help mitigate the cost?

  • A. Create a new DynamoDB table. Use the new DynamoDB table to store all metadata about all objects uploaded to Amazon S3. Any time a new object is uploaded, update the application's internal Amazon S3 object metadata cache from DynamoDB.
    C Using Amazon SNS, create a notification on any new Amazon S3 objects that automatical ly updates a new DynamoDB table to store all metadata about the new object. Subscribe the application to the Amazon SNS topic to update its internal Amazon S3 object metadata cache from the DynamoDB table.

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