EXAMS AWS CERTIFIED DEVELOPER - ASOCIATE 23

< Temario

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Acompany wants to migrate its web application to AWS and leverage Auto Scaling to handle pear workloads.

The Solutions Architect determined that the best metric for an Auto Scaling event is the number of concurrent users.

Based on this information, what should the Developer use to autoscale based on concurrent users?

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ADeveloper is testing a Docker-based application that uses the AWSSDKto interact with Amazon DynamoDB.

In the local development environment, the application has used IAMaccess keys.

The application is now ready for deployment onto an ECScluster.

How should the application authenticate with AWSservices in production?

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ADeveloper is asked to implement a caching layer in front of Amazon RDS.

Cached content is expensive to regenerate in case of service failure.

Which implementation below would work while maintaining maximum uptime?

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A root account owner is trying to setup an additional level of security for all his IAM users.

Which of the below mentioned options is a recommended solution for the account owner?

Multi-Factor Authentication adds an extra level of security for all the users. The user can enable MFA for all IAM users which ensures that each user has to provide an extra six digit code for authentication. http://docs.aws.amazon.com/IAM/latest/UserGuide/Using_ManagingMFA.html

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In relation to Amazon Simple Workflow Service (Amazon SWF),what is an "Activity Worker"?

In relation to Amazon Simple Workflow Service (Amazon SWF), an activity worker is a program that receives activity tasks, performs them, and provides results back. Which translates to a piece of software that implements tasks. http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dg-develop-activity.html

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Can one instance be registered with two ELBs in the same region?

Yes, it is possible to have one instance part of two separate ELBs, though both ELBs have different configurations. ELBs are never launched in specific zones. http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/enable-disable-az.html

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What is the maximum time messages can be stored in SQS?

A message can be stored in the Simple Queue Service (SQS) from 1 minute up to a maximum of 14 days.

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Regarding Amazon SQS, what happens if there is no activity against a queue for more than 30 consecutive days?

AWS reserve the right to delete a queue if none of the following requests have been issued against the queue for more than 30 consecutive days: SendMessage ReceiveMessage DeleteMessage GetQueueAttributes SetQueueAttributes You should design your application with this in mind. https://aws.amazon.com/sqs/faqs/

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