2019 Amazon AWS-DevOps-Engineer-Professional試験

AWS-DevOps-Engineer-Professional 問題集は収集され、業界で長年の試験経験を持つ多くの専門家によって分類され、最終的に編集されました。

AWS-DevOps-Engineer-Professional 問題集のすべての質問と回答は、最新のAmazon AWS-DevOps-Engineer-Professional試験から来ます。

多数のAmazon技術受験者によって効果的であることが実証されており、命中率がとても高いです。

AWS-DevOps-Engineer-Professional 問題集の役割は何ですか？
問題集の最も直接的な役割は、Amazon AWS-DevOps-Engineer-Professional試験が一発で合格することを保証することです。

また、AWS-DevOps-Engineer-Professional 問題集の検査のために試験準備計画をカスタマイズすることもできます。

AWS-DevOps-Engineer-Professional試験の1回限りのパスでは、複数のメイクアップ試験の問題や試験の重複費用を避けることができます。

効果的な復習計画をし、35％の学習効率を向上させながら、試験準備時間の65％を節約できます。

なぜAWS-DevOps-Engineer-Professional 問題集を使用する必要がありますか？
AWS-DevOps-Engineer-Professional 問題集は実践的な問題の最も効果的な解決策：「どのように一度に試験の円滑に通過を確保することができますか？」

繰り返して問題を研究し、我々は最後に、Amazon AWS-DevOps-Engineer-Professional試験の質問と回答をマスターすることができます。

AWS-DevOps-Engineer-Professional 問題集を使用すると、Amazon AWS-DevOps-Engineer-Professional実際の試験問題のシミュレーション演習を行うことと同等です。

多くのラウンドの練習の後、試験中の緊張を効果的に和らげ、試験に合格するという自信を高めます。

https://www.itshiken.jp/aws-devops-engineer-professional-shiken.html

Question No : 1
What method should I use to author automation if I want to wait for a CloudFormation stack to finish completing in a script?
A.Event subscription using SQ
B.Event subscription using SN
C.Poll using <code>ListStacks</code> / <code>list-stacks</code>.
D.Poll using <code>GetStackStatus</code> / <code>get-stack-status</code>.

正解:
Explanation:
Event driven systems are good for IFTTT logic, but only polling will make a script wait to complete. ListStacks / list-stacks is a real method, GetStackStatus / get-stack-status is not.
Reference: http://docs.aws.amazon.com/cli/latest/reference/cloudformation/list-stacks.html

Question No : 2
Your application consists of 10% writes and 90% reads. You currently service all requests through a Route53 Alias Record directed towards an AWS ELB, which sits in front of an EC2 Auto Scaling Group. Your system is getting very expensive when there are large traffic spikes during certain news events, during which many more people request to read similar data all at the same time.
What is the simplest and cheapest way to reduce costs and scale with spikes like this?
A.Create an S3 bucket and asynchronously replicate common requests responses into S3 objects. When a request comes in for a precomputed response, redirect to AWS S3.
B.Create another ELB and Auto Scaling Group layer mounted on top of the other system, adding a tier to the system. Serve most read requests out of the top layer.
C.Create a CloudFront Distribution and direct Route53 to the Distribution. Use the ELB as an Origin and specify Cache Behaviours to proxy cache requests which can be served late.
D.Create a Memcached cluster in AWS ElastiCache. Create cache logic to serve requests which can be served late from the in-memory cache for increased performance.

正解:
Explanation:
CloudFront is ideal for scenarios in which entire requests can be served out of a cache and usage patterns involve heavy reads and spikiness in demand.
A cache behavior is the set of rules you configure for a given URL pattern based on file extensions, file names, or any portion of a URL path on your website (e.g., *.jpg). You can configure multiple cache behaviors for your web distribution. Amazon CloudFront will match incoming viewer requests with your list of URL patterns, and if there is a match, the service will honor the cache behavior you configure for that URL pattern. Each cache behavior can include the following Amazon CloudFront configuration values: origin server name, viewer connection protocol, minimum expiration period, query string parameters, cookies, and trusted signers for private content.
Reference: https://aws.amazon.com/cloudfront/dynamic-content/

Question No : 3
You need to perform ad-hoc business analytics queries on well-structured data. Data comes in constantly at a high velocity. Your business intelligence team can understand SQL.
What AWS service(s) should you look to first?
A.Kinesis Firehose + RDS
B.Kinesis Firehose + RedShift
C.EMR using Hive
D.EMR running Apache Spark

正解:
Explanation:
Kinesis Firehose provides a managed service for aggregating streaming data and inserting it into RedShift. RedShift also supports ad-hoc queries over well-structured data using a SQL-compliant wire protocol, so the business team should be able to adopt this system easily.
Reference: https://aws.amazon.com/kinesis/firehose/details/

Question No : 4
You are building a game high score table in DynamoDB. You will store each user's highest score for each game, with many games, all of which have relatively similar usage levels and numbers of players. You need to be able to look up the highest score for any game.
What's the best DynamoDB key structure?
A.HighestScore as the hash / only key.
B.GameID as the hash key, HighestScore as the range key.
C.GameID as the hash / only key.
D.GameID as the range / only key.

正解:
Explanation:
Since access and storage for games is uniform, and you need to have ordering within each game for the scores (to access the highest value), your hash (partition) key should be the GameID, and there should be a range key for HighestScore.
Reference:
http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/GuidelinesForTables.html#GuidelinesForTables.Partitions

Question No : 5
What is server immutability?
A.Not updating a server after creation.
B.The ability to change server counts.
C.Updating a server after creation.
D.The inability to change server counts.

正解:
Explanation:
... disposable upgrades offer a simpler way to know if your application has unknown dependencies. The underlying EC2 instance usage is considered temporary or ephemeral in nature for the period of deployment until the current release is active. During the new release, a new set of EC2 instances are rolled out by terminating older instances. This type of upgrade technique is more common in an immutable infrastructure.
Reference: https://d0.awsstatic.com/whitepapers/overview-of-deployment-options-on-aws.pdf

Question No : 6
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 and requesting system are both in the wrong Availability Zone.
C.The EBS Volumes are not using PIOP
D.The database is not running in a placement group.

正解:
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

Question No : 7
Fill the blanks: __________ helps us track AWS API calls and transitions, _________ helps to understand what resources we have now, and ________ allows auditing credentials and logins.
A.AWS Config, CloudTrail, IAM Credential Reports
B.CloudTrail, IAM Credential Reports, AWS Config
C.CloudTrail, AWS Config, IAM Credential Reports
D.AWS Config, IAM Credential Reports, CloudTrail

正解:
Explanation:
You can use AWS CloudTrail to get a history of AWS API calls and related events for your account. This includes calls made by using the AWS Management Console, AWS SDKs, command line tools, and higher-level AWS services.
Reference: http://docs.aws.amazon.com/awscloudtrail/latest/userguide/cloudtrail-user-guide.html

Question No : 8
You are creating an application which stores extremely sensitive financial information. All information in the system must be encrypted at rest and in transit.
Which of these is a violation of this policy?
A.ELB SSL termination.
B.ELB Using Proxy Protocol v1.
C.CloudFront Viewer Protocol Policy set to HTTPS redirection.
D.Telling S3 to use AES256 on the server-side.

正解:
Explanation:
Terminating SSL terminates the security of a connection over HTTP, removing the S for "Secure" in HTTPS. This violates the "encryption in transit" requirement in the scenario.
Reference:
http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/elb-listener-config.html

Question No : 9
You need to scale an RDS deployment. You are operating at 10% writes and 90% reads, based on your logging.
How best can you scale this in a simple way?
A.Create a second master RDS instance and peer the RDS groups.
B.Cache all the database responses on the read side with CloudFront.
C.Create read replicas for RDS since the load is mostly reads.
D.Create a Multi-AZ RDS installs and route read traffic to standby.

正解: C
Explanation:
The high-availability feature is not a scaling solution for read-only scenarios; you cannot use a standby replica to serve read traffic. To service read-only traffic, you should use a Read Replica. For more information, see Working with PostgreSQL, MySQL, and MariaDB Read Replicas.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.MultiAZ.html

Question No : 10
When thinking of AWS Elastic Beanstalk, the 'Swap Environment URLs' feature most directly aids in what?
A.Immutable Rolling Deployments
B.Mutable Rolling Deployments
C.Canary Deployments
D.Blue-Green Deployments

正解: D
Explanation:
Simply upload the new version of your application and let your deployment service (AWS Elastic Beanstalk, AWS CloudFormation, or AWS OpsWorks) deploy a new version (green). To cut over to the new version, you simply replace the ELB URLs in your DNS records. Elastic Beanstalk has a Swap Environment URLs feature to facilitate a simpler cutover process.
Reference: https://d0.awsstatic.com/whitepapers/overview-of-deployment-options-on-aws.pdf