AWS-DevOps-Engineer-Professional 最新知識 & AWS-Solutions-Architect-Associate日本語 復習過去問 - AWS-Certified-Developer-Associate コンポーネント

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試験番号:AWS-DevOps-Engineer-Professional

試験科目:AWS Certified DevOps Engineer - Professional

最近更新時間:2017-04-04

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試験番号:AWS-Solutions-Architect-Associate日本語

試験科目:AWS Certified Solutions Architect - Associate (AWS-Solutions-Architect-Associate日本語版)

最近更新時間:2017-04-04

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試験番号:AWS-Certified-Developer-Associate

試験科目:AWS Certified Developer - Associate

最近更新時間:2017-04-04

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NO.1 You were just hired as a DevOps Engineer for a startup. Your startup uses AWS for 100% of their
infrastructure. They currently have no automation at all for deployment, and they have had many
failures
while trying to deploy to production. The company has told you deployment process risk mitigation is
the
most important thing now, and you have a lot of budget for tools and AWS resources.
Their stack:
2 -tier API
Data stored in DynamoDB or S3, depending on type
Compute layer is EC2 in Auto Scaling Groups
They use Route53 for DNS pointing to an ELB
An ELB balances load across the EC2 instances
The scaling group properly varies between 4 and 12 EC2 servers.
Which of the following approaches, given this company's stack and their priorities, best meets the
company's needs?
A. Model the stack in 1 CloudFormation template, to ensure consistency and dependency graph
resolution. Write deployment and integration testing automation following Rolling Deployment
methodologies.
B. Model the stack in 3 CloudFormation templates: Data layer, compute layer, and networking layer.
Write
stack deployment and integration testing automation following Blue-Green methodologies.
C. Model the stack in AWS Elastic Beanstalk as a single Application with multiple Environments. Use
Elastic Beanstalk's Rolling Deploy option to progressively roll out application code changes when
promoting across environments.
D. Model the stack in AWS OpsWorks as a single Stack, with 1 compute layer and its associated ELB.
Use Chef and App Deployments to automate Rolling Deployment.
Answer: B

AWS-DevOps-Engineer-Professional テスト   
Explanation:
AWS recommends Blue-Green for zero-downtime deploys. Since you use DynamoDB, and neither
AWS
OpsWorks nor AWS Elastic Beanstalk directly supports DynamoDB, the option selecting
CloudFormation
and Blue-Green is correct.
You use various strategies to migrate the traffic from your current application stack (blue) to a new
version
of the application (green). This is a popular technique for deploying applications with zero downtime.
The
deployment services like AWS Elastic Beanstalk, AWS CloudFormation, or AWS OpsWorks are
particularly useful as they provide a simple way to clone your running application stack. You can set
up a
new version of your application (green) by simply cloning current version of the application (blue).
Reference: https://d0.awsstatic.com/whitepapers/overview-of-deployment-options-on-aws.pdf

NO.2 You run a clustered NoSQL database on AWS EC2 using AWS EBS. You need to reduce latency
for
database response times. Performance is the most important concern, not availability. You did not
perform the initial setup, someone without much AWS knowledge did, so you are not sure if they
configured everything optimally. Which of the following is NOT likely to be an issue contributing to
increased latency?
A. The EC2 instances are not EBS Optimized.
B. The database is not running in a placement group.
C. The database and requesting system are both in the wrong Availability Zone.
D. The EBS Volumes are not using PIOPS.
Answer: C

AWS-DevOps-Engineer-Professional 予約   
Explanation:
For the highest possible performance, all instances in a clustered database like this one should be in a
single Availability Zone in a placement group, using EBS optimized instances, and using PIOPS SSD
EBS Volumes. The particular Availability Zone the system is running in should not be important, as
long
as it is the same as the requesting resources.
Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html