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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q494-Q499):

NEW QUESTION # 494
The resources for a business-critical, three-tier web application are expressed in a series of AWS CloudFormation templates. The application is using Amazon RDS for data and Amazon ElastiCache for session state. Users have reported degraded performance in the application.
A DevOps Engineer notices that the T2 instance type is being used for the application tier and CPU usage is at 100% in Amazon CloudWatch.
What process should the Engineer follow to restore operations with the LEAST amount of distribution to the end users?

• A. Launch a new CloudFormation stack for the application tier using the M4 instance type, run acceptance tests against the new stack, and update the Amazon Route 53 A record
• B. Update the CloudFormation stack for the application tier using the T2 Unlimited option, run acceptance tests against the new stack, and update the Amazon Route 53 A record
• C. Launch a new CloudFormation stack for all tiers of the application in a different region, run acceptance tests against the new stack, and update the Amazon Route 53 A record
• D. Write a new CloudFormation template to include Amazon CloudFront in the environment, launch the stack, and update the Amazon Route 53 A record

Answer: B

NEW QUESTION # 495
When writing plays, tasks and playbooks, Ansible fully supports which high level language to describe these?

• A. YAML
• B. XML
• C. Python
• D. JSON

Answer: A

Explanation:
Explanation: This can be bit of a trick question. While Ansible Playbooks in this course are written in YAML, Ansible will accept plays, tasks and playbooks in JSON, as JSON a subset of YAML. However, the preferred and fully supported method is YAML.
Reference:
http://docs.ansible.com/ansible/YAMLSyntax.html

NEW QUESTION # 496
Why are more frequent snapshots or EBS Volumes faster?

• A. AWS provisions more disk throughput for burst capacity during snapshots if the drive has been pre-warmed by snapshotting and reading all blocks.
• B. Blocks in EBS Volumes are allocated lazily, since while logically separated from other EBS Volumes, Volumes often share the same physical hardware. Snapshotting the first time forces full block range allocation, so the second snapshot doesn't need to perform the allocation phase and is faster.
• C. The drive is pre-warmed, so block access is more rapid for volumes when every block on the device has already been read at least one time.
• D. The snapshots are incremental so that only the blocks on the device that have changed after your last snapshot are saved in the new snapshot.

Answer: D

Explanation:
After writing data to an EBS volume, you can periodically create a snapshot of the volume to use as a baseline for new volumes or for data backup. If you make periodic snapshots of a volume, the snapshots are incremental so that only the blocks on the device that have changed after your last snapshot are saved in the new snapshot. Even though snapshots are saved incrementally, the snapshot deletion process is designed so that you need to retain only the most recent snapshot in order to restore the volume.
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-creating-snapshot.html

NEW QUESTION # 497
Your development team use .Net to code their web application. They want to deploy it to AWS for the purpose of continuous integration and deployment. The application code is hosted in a Git repository. Which of the following combination of steps can be used to fulfil this requirement. Choose 2 answers from the options given below

• A. Usethe Elastic beanstalk service to provision an IIS platform web environment tohost the application.
• B. Usea chef recipe to deploy the code and attach it to the Elastic beanstalkenvironment.
• C. Usethe Code Pipeline service to provision an IIS environment to host theapplication.
• D. Createa source bundle for the .Net code and upload it as an application revision.

Answer: A,D

Explanation:
Explanation
When you provision an environment using the Clastic beanstalk service, you can choose the IIS platform to host the .Net based application as shown below.

You can also upload the application as a zip file and specify it as an application revision.
For more information on Elastic beanstalk and .Net environments, please refer to the below link:
http://docs