DOP-C01 Prüfungen & DOP-C01 Fragenpool

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Die Amazon DOP-C01 (AWS Certified DevOps Engineer-Professional) -Zertifizierungsprüfung richtet sich an erfahrene DevOps-Profis, die ein tiefes Verständnis der AWS-Plattform haben und praktische Erfahrung mit DevOps-Tools und -Praktiken haben. Diese Zertifizierung bestätigt die Fähigkeiten einer Person bei der Implementierung, Automatisierung und Verwaltung verschiedener AWS -Dienste mithilfe von DevOps -Prinzipien und -Praktiken.

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Amazon AWS Certified DevOps Engineer - Professional DOP-C01 Prüfungsfragen mit Lösungen (Q475-Q480):

475. Frage
You have a code repository that uses Amazon S3 as a data store. During a recent audit of your security controls, some concerns were raised about maintaining the integrity of the data in the Amazon S3 bucket.
Another concern was raised around securely deploying code from Amazon S3 to applications running on Amazon EC2 in a virtual private cloud. What are some measures that you can implement to mitigate these concerns? Choose two answers from the options given below.

A. Add an Amazon S3 bucket policy with a condition statement to allow access only from Amazon EC2 instances with RFC 1918 IP addresses and enable bucket versioning.
B. Use AWS Data Pipeline with multi-factor authentication to securely deploy code from the Amazon S3 bucket to your Amazon EC2 instances.
C. Create an Amazon Identity and Access Management role with authorization to access the Amazon S3 bucket, and launch all of your application's Amazon EC2 instances with this role.
D. Use a configuration management service to deploy AWS Identity and Access Management user credentials to the Amazon EC2 instances. Use these credentials to securely access the Amazon S3 bucket when deploying code.
E. Use AWS Data Pipeline to lifecycle the data in your Amazon S3 bucket to Amazon Glacier on a weekly basis.
F. Add an Amazon S3 bucket policy with a condition statement that requires multi-factor authentication in order to delete objects and enable bucket versioning.

Antwort: C,F

Begründung:
Explanation
You can add another layer of protection by enabling MFA Delete on a versioned bucket. Once you do so, you must provide your AWS account's access keys and a valid code from the account's MFA device in order to permanently delete an object version or suspend or reactivate versioning on the bucket.
For more information on MFA please refer to the below link:
* https://aws.amazon.com/blogs/security/securing-access-to-aws-using-mfa-part-3/ IAM roles are designed so that your applications can securely make API requests from your instances, without requiring you to manage the security credentials that the applications use. Instead of creating and distributing your AWS credentials, you can delegate permission to make API requests using 1AM roles For more information on Roles for CC2 please refer to the below link:
* http://docs.aws.amazon.com/AWSCC2/latest/UserGuide/iam-roles-for-amazon-ec2.htmI
Option A is invalid because this will not address either the integrity or security concern completely.
Option C is invalid because user credentials should never be used in CC2 instances to access AWS resources.
Option C and F are invalid because AWS Pipeline is an unnecessary overhead when you already have inbuilt controls to manager security for S3.

476. Frage
An e-commerce company is running a web application in an AWS Elastic Beanstalk environment.
In recent months, the average load of the Amazon EC2 instances has been increased to handle more traffic. The company would like to improve the scalability and resilience of the environment.
The Development team has been asked to decouple long-running tasks from the environment if the tasks can be executed asynchronously. Examples of these tasks include confirmation emails when users are registered to the platform, and processing images or videos. Also, some of the periodic tasks that are currently running within the web server should be offloaded.
What is the most time-efficient and integrated way to achieve this?

A. Create a second Elastic Beanstalk web server tier environment and deploy the application to process the asynchronous tasks. Send the tasks that should be decoupled from the original Elastic Beanstalk web server to the auto-generated Amazon SQS queue by the Elastic Beanstalk web server tier environment. Place a cron.yaml file within the root of the application source bundle for the second web server tier environment with the necessary periodic tasks. Use environment links to link both web server environments.
B. Create an Amazon SQS queue and send the tasks that should be decoupled from the Elastic Beanstalk web server environment to the SQS queue. Create a fleet of EC2 instances under an Auto Scaling group. Install and configure the application to listen for messages within the SQS queue from UserData and create periodic tasks by placing those into the cron in the operating system. Create an environment variable within the Elastic Beanstalk web server environment with a value pointing to the SQS queue endpoint.
C. Create an Amazon SQS queue and send the tasks that should be decoupled from the Elastic Beanstalk web server environment to the SQS queue. Create a fleet of EC2 instances under an Auto Scaling group. Use an AMI that contains the application to process the asynchronous tasks, configure the application to listen for messages within the SQS queue, and create periodic tasks by placing those into the cron in the operating system. Create an environment variable within the Elastic Beanstalk environment with a value pointing to the SQS queue endpoint.
D. Create a second Elastic Beanstalk worker tier environment and deploy the application to process the asynchronous tasks there. Send the tasks that should be decoupled from the original Elastic Beanstalk web server environment to the auto-generated Amazon SQS queue by the Elastic Beanstalk worker environment. Place a cron.yaml file within the root of the application source bundle for the worker environment periodic tasks. Use environment links to link the web server environment with the worker environment.

Antwort: D

477. Frage
A company is using AWS CodeBuild, AWS CodeDeploy, and AWS CodePipeline to deploy applications automatically to an Amazon EC2 instance. A DevOps Engineer needs to perform a security assessment scan of the operating system on every application deployment to the environment.
How should this be automated?

A. Use Amazon CloudWatch Events to monitor for Auto Scaling event notifications of new instances and configure CloudWatch Events to trigger an Amazon Inspector scan.
B. Use Amazon CloudWatch Events to monitor for CodePipeline notifications of a successful code deployment and configure CloudWatch Events to trigger an AWS X-Ray scan.
C. Use Amazon Inspector as a CodePipeline task after the successful use of CodeDeploy to deploy the code to the systems.
D. Use Amazon CloudWatch Events to monitor for AWS CodeDeploy notifications of a successful code deployment and configure CloudWatch Events to trigger an Amazon Inspector scan.

Antwort: D

478. Frage
When running a playbook on a remote target host you receive a Python error similar to "[Errno
13] Permission denied: `/home/nick/.ansible/tmp'. What would be the most likely cause of this problem?

A. The user's home or `.ansible' directory on the Ansible remote host is not writeable by the user running the play
B. The user's home or `.ansible' directory on the Ansible system is not writeable by the user running the play.
C. The specified user does not exist on the remote system.
D. The user running `ansible-playbook' must run it from their own home directory.

Antwort: A

Begründung:
Each task that Ansible runs calls a module. When Ansible uses modules it copies the module to the remote target system. In the error above it attempted to copy it to the remote user's home directory and found that either the home directory or the `.ansible' directory were not writeable and thus could not continue.
Reference: http://docs.ansible.com/ansible/modules_intro.html

479. Frage
A company runs a three-tier web application in its production environment, which is built on a single AWS CloudFormation template made up of Amazon EC2 instances behind an ELB Application Load Balancer. The instances run in an EC2 Auto Scaling group across multiple Availability Zones. Data is stored in an Amazon RDS Multi-AZ DB instance with read replicas.
Amazon Route 53 manages the application's public DNS record.
A DevOps Engineer must create a workflow to mitigate a failed software deployment by rolling back changes in the production environment when a software cutover occurs for new application software. What steps should the Engineer perform to meet these requirements with the LEAST amount of downtime?

A. Use a single AWS Elastic Beanstalk environment to deploy the staging and production environments.
Update the environment by uploading the ZIP file with the new application code. Swap the Elastic Beanstalk environment CNAME. Validate the traffic in the new environment and immediately terminate the old environment if tests are successful.
B. Use a single AWS Elastic Beanstalk environment and an AWS OpsWorks environment to deploy the staging and production environments. Update the environment by uploading the ZIP file with the new application code into the Elastic Beanstalk environment deployed with the OpsWorks stack. Validate the traffic in the new environment and immediately terminate the old environment if tests are successful.
C. Use AWS CloudFormation to deploy an additional staging environment, and configure the Route
53 DNS with weighted records. During cutover, increase the weight distribution to have more traffic directed to the new staging environment as workloads are successfully validated. Keep the old production environment in place until the new staging environment handles all traffic.
D. Use CloudFormation to deploy an additional staging environment and configure the Route 53 DNS with weighted records. During cutover, change the Route 53 A record weights to achieve an even traffic distribution between the two environments. Validate the traffic in the new environment and immediately terminate the old environment if tests are successful.

Antwort: C

480. Frage
......

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DOP-C01 Prüfungen & DOP-C01 Fragenpool

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Amazon AWS Certified DevOps Engineer - Professional DOP-C01 Prüfungsfragen mit Lösungen (Q475-Q480):

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