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The AWS Certified DevOps Engineer - Professional certification is an essential certification for professionals who want to demonstrate their expertise in designing and implementing DevOps practices using AWS services. AWS Certified DevOps Engineer - Professional certification validates the skills needed to manage and automate infrastructure, deploy applications, and monitor performance on the AWS platform. To prepare for the exam, candidates should have experience working with AWS services and should have a strong understanding of DevOps principles and practices, as well as familiarity with CI/CD, IAC, monitoring, and logging tools, and security and compliance best practices.

Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q484-Q489):

NEW QUESTION # 484
You are building a deployment system on AWS. You will deploy new code by bootstrapping instances in a private subnet in a VPC at runtime using UserData scripts pointing to an S3 zip file object, where your code is stored. An ELB in a public subnet has network interfaces and connectivity to the instances. Requests from users of the system are routed to the ELB via a Route53 A Record Alias. You do not use any VPC endpoints. Which is a risk of using this approach?

• A. The instances cannot be in a private subnet if the ELB is in a public one.
• B. If the NAT routing for the private subnet fails, deployments fail.
• C. Route53 Alias records do not always update dynamically with ELB network changes after deploys.
• D. Kernel changes to the base AMI may render the code inoperable.

Answer: B

Explanation:
Since you are not using VPC endpoints, outbound requests for the code sitting in S3 are routed though the NAT for the VPC's private subnets. If this networking fails, runtime bootstrapping through code download will fail due to network unavailability and lack of access to the Internet, and thus Amazon S3.
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_NAT_Instance.html

NEW QUESTION # 485
A publishing company used AWS Elastic Beanstalk, Amazon S3, and Amazon DynamoDB to develop a web application. The web application has increased dramatically in popularity, resulting in unpredictable spikes in traffic. A DevOps Engineer has noted that 90% of the requests are duplicate read requests. How can the Engineer improve the performance of the website?

• A. Use Amazon ElastiCache for Redis to cache repeated read requests to DynamoDB and AWS Elemental MediaStore to cache images stored in S3.
• B. Use DynamoDB Accelerator to cache repeated read requests to DynamoDB and Amazon CloudFront to cache images stored in S3.
• C. Use DynamoDB Streams to cache repeated read requests to DynamoDB and API Gateway to cache images stored in S3.
• D. Use Amazon ElastiCache for Memcached to cache repeated read requests to DynamoDB and Varnish to cache images stored in S3.

Answer: A

NEW QUESTION # 486
Your company uses AWS to host its resources. They have the following requirements
1) Record all API calls and Transitions
2) Help in understanding what resources are there in the account
3) Facility to allow auditing credentials and logins Which services would suffice the above requirements

• A. CloudTrail, AWS Config, 1AM Credential Reports
• B. AWS Config, 1AM Credential Reports, CloudTrail
• C. AWS Config, CloudTrail, 1AM Credential Reports
• D. CloudTrail, 1AM Credential Reports, AWS Config

Answer: A

Explanation:
Explanation
You can use AWS CloudTrail to get a history of AWS API calls and related events for your account. This
history includes calls made with the AWS Management
Console, AWS Command Line Interface, AWS SDKs, and other AWS services.
For more information on Cloudtrail, please visit the below URL:
* http://docs.aws.a
mazon.com/awscloudtrail/latest/userguide/cloudtrai l-user-guide.html
AWS Config is a service that enables you to assess, audit, and evaluate the configurations of your AWS
resources. Config continuously monitors and records your AWS resource configurations and allows you to
automate the evaluation of recorded configurations against desired configurations. With Config, you can
review changes in configurations and relationships between AWS resources, dive into detailed resource
configuration histories, and determine your overall compliance against the configurations specified in your
internal guidelines. This enables you to simplify compliance auditing, security analysis, change management,
and operational troubleshooting. For more information on the config service, please visit the below URL:
* https://aws.amazon.com/config/
You can generate and download a credential reportthat lists all users in your account and the status of their
various credentials, including passwords, access keys, and MFA devices. You can get a credential report from
the AWS Management Console, the AWS SDKs and Command Line Tools, or the 1AM API. For more
information on Credentials Report, please visit the below URL:
* http://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_getting-report.html

NEW QUESTION # 487
Your development team wants account-level access to production instances in order to do live debugging of a highly secure environment. Which of the following should you do?

• A. Place each developer's own public key into a private S3 bucket, use instance profiles and configuration management to create a user account for each developer on all instances, and place the user's public keys into the appropriate account.

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