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Amazon AWS Certified DevOps Engineer - Professional 認定 AWS-DevOps-Engineer-Professional 試験問題 (Q143-Q148):

質問 # 143
A DevOps Engineer is setting up a container-based architecture. The Engineer has decided to use AWS CloudFormation to automatically provision an Amazon ECS cluster and an Amazon EC2 Auto Scaling group to launch the EC2 container instances. After successfully creating the CloudFormation stack, the Engineer noticed that, even though the ECS cluster and the EC2 instances were created successfully and the stack finished the creation, the EC2 instances were associating with a different cluster.
How should the DevOps Engineer update the CloudFormation template to resolve this issue?

A. Reference the ECS cluster in the AWS::AutoScaling::LaunchConfiguration resource of the UserData property.
B. Reference the EC2 instances in the AWS::ECS::Cluster resource and reference the ECS cluster in the AWS::ECS::Service resource.
C. Reference the ECS cluster in the AWS::EC2::Instance resource of the UserData property.
D. Reference the ECS cluster in the AWS::CloudFormation::CustomResource resource to trigger an AWS Lambda function that registers the EC2 instances with the appropriate ECS cluster.

正解：A

解説：
Explanation/Reference: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-as- launchconfig.html

質問 # 144
Your system automatically provisions EIPs to EC2 instances in a VPC on boot. The system provisions the whole VPC and stack at once. You have two of them per VPC. On your new AWS account, your attempt to create a Development environment failed, after successfully creating Staging and Production environments in the same region. What happened?

A. You didn't set the Development flag to true when deploying EC2 instances.
B. You didn't choose the Development version of the AMI you are using.
C. You hit the soft limit of 5 EIPs per region and requested a 6th.
D. You hit the soft limit of 2 VPCs per region and requested a 3rd.

正解：C

解説：
Explanation
The most likely cause is the fact you have hit the maximum of 5 Elastic IP's per region.
By default, all AWS accounts are limited to 5 Clastic IP addresses per region, because public (IPv4) Internet addresses are a scarce public resource. We strongly encourage you to use an Elastic IP address primarily for the ability to remap the address to another instance in the case of instance failure, and to use DNS hostnames for all other inter-node communication.
Option A is invalid because a AMI does not have a Development version tag.
Option B is invalid because there is no flag for an CC2 Instance
Option D is invalid because there is a limit of 5 VPCs per region.
For more information on Clastic IP's, please visit the below URL:
* http://docs.aws.amazon.com/AWSCC2/latest/UserGuide/elastic-ip-addresses-eip.html

質問 # 145
Your company has the requirement to set up instances running as part of an Autoscaling Group. Part of the requirement is to use Lifecycle hooks to setup custom based software's and do the necessary configuration on the instances. The time required for this setup might take an hour, or might finish before the hour is up. How should you setup lifecycle hooks for the Autoscaling Group. Choose 2 ideal actions you would include as part of the lifecycle hook.

A. Configure the lifecycle hook to record heartbeats. If the hour is up, choose to terminate the current instance and start a new one
B. If the software installation and configuration is complete, then send a signal to complete the launch of the instance.
C. Ifthe software installation and configuration is complete, then restart the time period.
D. Configure the lifecycle hook to record heartbeats. If the hour is up, restart the timeout period.

正解：B、D

解説：
Explanation
The AWS Documentation provides the following information on lifecycle hooks By default, the instance remains in a wait state for one hour, and then Auto Scaling continues the launch or terminate process (Pending: Proceed or Terminating: Proceed). If you need more time, you can restart the timeout period by recording a heartbeat. If you finish before the timeout period ends, you can complete the lifecycle action, which continues the launch or termination process For more information on AWS Lifecycle hooks, please visit the below URL:
* http://docs.aws.amazon.com/autoscaling/latest/userguide/lifecycle-hooks.html

質問 # 146
You work for a company that has multiple applications which are very different and built on different programming languages. How can you deploy applications as quickly as possible?

A. Develop each app in a separate Docker container and deploy using Elastic Beanstalk V
B. Create a Lambda function deployment package consisting of code and any dependencies
C. Develop each app in one Docker container and deploy using ElasticBeanstalk
D. Develop each app in a separate Docker containers and deploy using CloudFormation

正解：A

解説：
Explanation
Elastic Beanstalk supports the deployment of web applications from Docker containers. With Docker containers, you can define your own runtime environment. You can choose your own platform, programming language, and any application dependencies (such as package managers or tools), that aren't supported by other platforms. Docker containers are self-contained and include all the configuration information and software your web application requires to run.
Option A is an efficient way to use Docker. The entire idea of Docker is that you have a separate environment for various applications.
Option B is ideally used to running code and not packaging the applications and dependencies Option D is not ideal deploying Docker containers using Cloudformation For more information on Docker and Clastic Beanstalk, please visit the below URL:
http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/create_deploy_docker.html

質問 # 147
You have a requirement to host a cluster of NoSQL databases. There is an expectation that there will be a lot of I/O on these databases. Which EBS volume type is best for high performance NoSQL cluster deployments?

A. standard
B. io1
C. gp1
D. gp2

正解：B

解説：
Explanation
Provisioned IOPS SSD should be used for critical business applications that require sustained IOPS performance, or more than 10,000 IOPS or 160 MiB/s of throughput per volume This is ideal for Large database workloads, such as:
* MongoDB
* Cassandra
* MicrosoftSQL Server
* MySQL
* PostgreSQL
* Oracle
For more information on the various CBS Volume Types, please refer to the below link:
* http://docs.aws.amazon.com/AWSCC2/latest/UserGuide/CBSVolumeTvpes.html

質問 # 148
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