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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q255-Q260):

NEW QUESTION # 255
A company wants to migrate a legacy application to AWS and develop a deployment pipeline that uses AWS services only. A DevOps engineer is migrating all of the application code from a Git repository to AWS CodeCommit while preserving the history of the repository. The DevOps engineer has set all the permissions within CodeCommit, installed the Git client and the AWS CLI on a local computer, and is ready to migrate the repository.
Which actions will follow?

A. Create the CodeCommit repository using the AWS Management Console. Use the console to clone the Git repository into the CodeCommit repository. Validate that the files were migrated, and publish the CodeCommit repository.
B. Create the CodeCommit repository using the AWS Management Console. Clone both the Git and CodeCommit repositories to the local computer. Copy the files from the Git repository to the CodeCommit repository on the local computer. Commit the CodeCommit repository. Validate that the files were migrated, and share the CodeCommit repository.
C. Create the CodeCommit repository using the AWS Management Console or the AWS CLI. Clone the Git repository with a mirror argument to the local computer and push the repository to CodeCommit. Validate that the files were migrated, and share the CodeCommit repository.
D. Create the CodeCommit repository using the AWS CLI. Clone the Git repository directly to CodeCommit using the AWS CLI. Validate that the files were migrated, and publish the CodeCommit repository.

Answer: D

NEW QUESTION # 256
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. AWS Config, 1AM Credential Reports, CloudTrail
B. CloudTrail, 1AM Credential Reports, AWS Config
C. CloudTrail, AWS Config, 1AM Credential Reports
D. AWS Config, CloudTrail, 1AM Credential Reports

Answer: C

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 # 257
You have an application running on multiple Amazon EC2 instances within an Auto Scaling group.
You notice that instances are being re-spawned as their health checks are failing in Amazon EC2.
However, before you have a chance to diagnose the issue, the affected instances are being terminated by the Auto Scaling service.
You receive notifications of health checks failing and investigate within 20 minutes.
However, this is not enough time to troubleshoot the issue.
What should you change that will enable you to troubleshoot the instance before it is terminated by the Auto Scaling service, while keeping costs minimal?

A. Create an Auto Scaling Group lifecycle hook to hold the instance in a terminating:wait state until you have completed any troubleshooting.
When you have completed troubleshooting, wait for the terminating state to expire, or notify to Scaling to complete the lifecycle hook and terminate the Instance.
B. Install the Amazon CloudWatch Logs Agent on the instance and configure application and system logs to be sent to the CloudWatch Logs service.
C. Change the "DeleteOnTermination" flag to false in the Auto Scaling group configuration to ensure that instances are not deleted in the future.
D. Configure an Amazon SNS topic and associate it with your Auto Scaling group's CloudWatch alarms.
Configure an Amazon SQS queue as a subscriber of this topic, and then create a fleet of Amazon EC2 workers that poll this queue and instruct the Amazon EC2 Auto Scaling API to remove the instance from the Auto Scaling group when an alarm is triggered.

Answer: A

NEW QUESTION # 258
You have an application hosted in AWS. This application was created using Cloudformation Templates and
Autoscaling. Now your application has got a surge of users which is decreasing the performance of the
application. As per your analysis, a change in the instance type to C3 would resolve the issue. Which of the
below option can introduce this change while minimizing downtime for end users?

A. Update the existing launch configuration with the new C3 instance type. Add an UpdatePolicy attribute
to your Auto Scalinggroup that specifies an AutoScaling RollingUpdate in order to avoid downtime.
B. Copy the old launch configuration, and create a new launch configuration with the C3 instances. Update
the Auto Scalinggroup with the new launch configuration. Auto Scaling will then update the instance
type of all running instances.
C. Update the launch configuration in the AWS CloudFormation template with the new C3 instance type.
Add an UpdatePolicy attribute to the Auto Scaling group that specifies an AutoScalingRollingUpdate.
Run a stack update with the updated template.
D. Update the AWS CloudFormation template that contains the launch configuration with the new C3
instance type. Run a stack update with the updated template, and Auto Scaling will then update the
instances one at a time with the new instance type.

Answer: C

Explanation:
Explanation
Ensure first that the cloudformation template is updated with the new instance type.
The AWS::AutoScaling::AutoScalingGroup resource supports an UpdatePoIicy attribute. This is used to
define how an Auto Scalinggroup resource is updated when
an update to the Cloud Formation stack occurs. A common approach to updating an Auto Scaling group is to
perform a rolling update, which is done by specifying
the AutoScalingRollingUpdate policy. This retains the same Auto Scaling group and replaces old instances
with new ones, according to the parameters specified.
Option A is invalid because this will cause an interruption to the users.
Option C is partially correct, but it does not have all the steps as mentioned in option B.
Option D is partially correct, but we need the AutoScalingRollingUpdate attribute to ensure a rolling update is
peformed.
For more information on AutoScaling Rolling updates please refer to the below link:
* https://aws.amazon.com/premiumsupport/knowledge-center/auto-scaling-group-rolling-updates/

NEW QUESTION # 259
After conducting a disaster recovery exercise, an Enterprise Architect discovers that a large team of Database and Storage Administrators need more then seven hours of manual effort to make a flagship application's database functional in a different AWS Region. The Architect also discovers that the recovered database is often missing as much as two hours of data transactions.
Which solution provides improved RTO and RPO in a cross-region failover scenario?

A. Deploy an Amazon RDS Multi-AZ instance backed by a multi-region Amazon EFS. Configure the RDS option group to enable multi-region availability for native automation of cross-region recovery and continuous data replication. Create an Amazon SNS topic subscribed to RDS-impacted events to send emails to the Database Administration team when significant query Latency is detected in a single Availability Zone.
B. Create a scheduled Amazon CloudWatch Events rule to make a call to Amazon RDS to create a snapshot from a database instance and specify a frequency to match the RPO. Create an AWS Step Functions task to call Amazon RDS to perform a cross-region snapshot copy into the failover region, and configure the state machine to execute the task when the RDS snapshot create state is complete.
Create an SNS topic subscribed to RDS availability events, and push these messages to an Amazon SQS queue located in the failover region. Configure an Auto Scaling group of worker nodes to poll the queue for new messages and make a call to Amazon RDS to restore a database from a snapshot after a checksum on the cross-region copied snapshot returns valid.
C. Use Amazon SNS topics to receive published messages from Amazon RDS availability and backup events. Use AWS Lambda for three separate functions with calls to Amazon RDS to snapshot a database instance, create a cross-region snapshot copy, and restore an instance from a snapshot. Use a scheduled Amazon CloudWatch Events rule at a frequency matching the RPO to trigger the Lambda function to snapshot a database instance. Trigger the Lambda function to create a cross-region snapshot copy when the SNS topic for backup events receives a new message. Configure the Lambda function to restore an instance from a snapshot to trigger sending new messages published to the availability SNS topic.
D. Use Amazon RDS scheduled instance lifecycle events to create a snapshot and specify a frequency to match the RPO. Use Amazon RDS scheduled instance lifecycle event configuration to perform a cross-region snapshot copy into the failover region upon SnapshotCreateComplete events. Configure Amazon CloudWatch to alert when the CloudWatch RDS namespace CPUUtilization metric for the database instance falls to 0% and make a call to Amazon RDS to restore the database snapshot in the failover region.

Answer: C

NEW QUESTION # 260
......

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