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Amazon Web Services DOP-C02 - AWS Certified DevOps Engineer - Professional

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Total 449 questions

A DevOps engineer has implemented a Cl/CO pipeline to deploy an AWS Cloud Format ion template that provisions a web application. The web application consists of an Application Load Balancer (ALB) a target group, a launch template that uses an Amazon Linux 2 AMI an Auto Scaling group of Amazon EC2 instances, a security group and an Amazon RDS for MySQL database The launch template includes user data that specifies a script to install and start the application.

The initial deployment of the application was successful. The DevOps engineer made changes to update the version of the application with the user data. The CI/CD pipeline has deployed a new version of the template However, the health checks on the ALB are now failing The health checks have marked all targets as unhealthy.

During investigation the DevOps engineer notices that the Cloud Formation stack has a status of UPDATE_COMPLETE. However, when the DevOps engineer connects to one of the EC2 instances and checks /varar/log messages, the DevOps engineer notices that the Apache web server failed to start successfully because of a configuration error

How can the DevOps engineer ensure that the CloudFormation deployment will fail if the user data fails to successfully finish running?

A.

Use the cfn-signal helper script to signal success or failure to CloudFormation Use the WaitOnResourceSignals update policy within the CloudFormation template Set an appropriate timeout for the update policy.

B.

Create an Amazon CloudWatch alarm for the UnhealthyHostCount metric. Include an appropriate alarm threshold for the target group Create an Amazon Simple Notification Service (Amazon SNS) topic as the target to signal success or failure to CloudFormation

C.

Create a lifecycle hook on the Auto Scaling group by using the AWS AutoScaling LifecycleHook resource Create an Amazon Simple Notification Service (Amazon SNS) topic as the target to signal success or failure to CloudFormation Set an appropriate timeout on the lifecycle hook.

D.

Use the Amazon CloudWatch agent to stream the cloud-init logs Create a subscription filter that includes an AWS Lambda function with an appropriate invocation timeout Configure the Lambda function to use the SignalResource API operation to signal success or failure to CloudFormation.

A company is optimizing its AWS costs. Most of the company’s AWS spend is for Amazon EC2. When the company analyzes its EC2 usage metrics in Amazon CloudWatch, the company observes that most of its EC2 instances are in an idle state.

The company considers an instance idle if it has a maximum CPU utilization of less than 2% in the previous 24 hours. The company evaluates metrics for instances based on 1-hour intervals. The company decides to configure a CloudWatch alarm for each EC2 instance in the account. The company wants the alarm to activate when an instance is idle.

How should the company configure the CloudWatch alarm?

A.

Select anomaly detection as the threshold type. Set the anomaly detection threshold to 2. Set Datapoints to Alarm to 24 out of 24.

B.

Select static as the threshold type. Set the threshold value to 2. Set Datapoints to Alarm to 24 out of 24.

C.

Select anomaly detection as the threshold type. Set the anomaly detection threshold to 2. Set Datapoints to Alarm to 1 out of 24.

D.

Select static as the threshold type. Set the threshold value to 2. Set Datapoints to Alarm to 1 out of 24.

A DevOps engineer must implement a solution that immediately terminates Amazon EC2 instances in Auto Scaling groups when cryptocurrency mining activity is detected.

Which solution will meet these requirements with the LEAST development effort?

A.

Configure Amazon Route 53 query logs → CloudWatch → Lambda every 5 mins to detect mining-related domains and terminate EC2 instances.

B.

Configure VPC Flow Logs → S3 → Lambda every 5 mins → Athena query → terminate EC2 instances.

C.

Enable Amazon GuardDuty. Monitor EC2 findings. Create an EventBridge rule triggered by GuardDuty. Invoke a Lambda function that terminates the affected EC2 instances.

D.

Enable AWS Security Hub. Monitor EC2 findings. Create an EventBridge rule triggered by Security Hub. Invoke Lambda to terminate EC2 instances.

A company ' s application uses a fleet of Amazon EC2 On-Demand Instances to analyze and process data. The EC2 instances are in an Auto Scaling group. The Auto Scaling group is a target group for an Application Load Balancer (ALB). The application analyzes critical data that cannot tolerate interruption. The application also analyzes noncritical data that can withstand interruption.

The critical data analysis requires quick scalability in response to real-time application demand. The noncritical data analysis involves memory consumption. A DevOps engineer must implement a solution that reduces scale-out latency for the critical data. The solution also must process the noncritical data.

Which combination of steps will meet these requirements? (Select TWO.)

A.

For the critical data, modify the existing Auto Scaling group. Create a warm pool instance in the stopped state. Define the warm pool size. Create a new version of the launch template that has detailed monitoring enabled. use Spot Instances.

B.

For the critical data, modify the existing Auto Scaling group. Create a warm pool instance in the stopped state. Define the warm pool size. Create a new version of the launch template that has detailed monitoring enabled. Use On-Demand Instances.

C.

For the critical data. modify the existing Auto Scaling group. Create a lifecycle hook to ensure that bootstrap scripts are completed successfully. Ensure that the application on the instances is ready to accept traffic before the instances are registered. Create a new version of the launch template that has detailed monitoring enabled.

D.

For the noncritical data, create a second Auto Scaling group that uses a launch template. Configure the launch template to install the unified Amazon CloudWatch agent and to configure the CloudWatch agent with a custom memory utilization metric. Use Spot Instances. Add the new Auto Scaling group as the target group for the ALB. Modify the application to use two target groups for critical data and noncritical data.

E.

For the noncritical data, create a second Auto Scaling group. Choose the predefined memory utilization metric type for the target tracking scaling policy. Use Spot Instances. Add the new Auto Scaling group as the target group for the ALB. Modify the application to use two target groups for critical data and noncritical data.

A DevOps team operates an integration service that runs on an Amazon EC2 instance. The DevOps team uses Amazon Route 53 to manage the integration service ' s domain name by using a simple routing record. The integration service is stateful and uses Amazon Elastic File System (Amazon EFS) for data storage and state storage. The integration service does not support load balancing between multiple nodes. The DevOps team deploys the integration service on a new EC2 instance as a warm standby to reduce the mean time to recovery. The DevOps team wants the integration service to automatically fail over to the standby EC2 instance. Which solution will meet these requirements?

A.

Update the existing Route 53 DNS record ' s routing policy to weighted. Set the existing DNS record ' s weighting to 100. For the same domain, add a new DNS record that points to the standby EC2 instance. Set the new DNS record ' s weighting to 0. Associate an application health check with each record.

B.

Update the existing Route 53 DNS record ' s routing policy to weighted. Set the existing DNS record ' s weighting to 99. For the same domain, add a new DNS record that points to the standby EC2 instance. Set the new DNS record ' s weighting to 1. Associate an application health check with each record.

C.

Create an Application Load Balancer (ALB). Update the existing Route 53 record to point to the ALB. Create a target group for each EC2 instance. Configure an application health check on each target group. Associate both target groups with the same ALB listener. Set the primary target group ' s weighting to 100. Set the standby target group ' s weighting to 0.

D.

Create an Application Load Balancer (ALB). Update the existing Route 53 record to point to the ALB. Create a target group for each EC2 instance. Configure an application health check on each target group. Associate both target groups with the same ALB listener. Set the primary target group ' s weighting to 99. Set the standby target group ' s weighting to 1.

A company uses an organization in AWS Organizations with all features enabled to manage a fleet of AWS accounts. The company expects to create many new accounts for an upcoming project.

The company wants to ensure that the new accounts will not have default VPCs and that users can develop only in specific AWS Regions. The company must monitor the new accounts for compliance with the Center for Internet Security (CIS) AWS Foundations Benchmark framework.

Which combination of solutions will meet these requirements with the LEAST operational effort? (Select TWO.)

A.

Activate AWS Control Tower. Configure AWS Control Tower to disable internet-accessible subnets. Set the maximum number of private subnets to zero. Configure Region denies, and ensure that users can access only the specified Regions.

B.

Activate AWS Control Tower. Install Customizations for AWS Control Tower (CfCT). Develop a custom AWS CloudFormation template to delete default VPCs. Configure Region denies, and ensure that users can access only the specified Regions.

C.

Write an SCP that denies access to all Regions except the specified Regions. Create an AWS Lambda function that assumes an IAM role by using the Organizations default service role in each member account to identify and delete default VPCs. Create an Amazon EventBridge rule that invokes the Lambda function when the company creates a new AWS account.

D.

Activate AWS Security Hub at the organization level. Select the CIS AWS Foundations Benchmark framework, and apply the framework to the organization.

E.

Activate the CIS AWS Foundations Benchmark framework on the Control Library panel in AWS Control Tower.

A software engineering team is using AWS CodeDeploy to deploy a new version of an application. The team wants to ensure that if any issues arise during the deployment, the process can automatically roll back to the previous version.

During the deployment process, a health check confirms the application ' s stability. If the health check fails, the deployment must revert automatically.

Which solution will meet these requirements?

A.

Implement lifecycle event hooks in the deployment configuration.

B.

Use AWS CloudFormation to monitor the health of the deployment.

C.

Set up alarms in Amazon CloudWatch to start a rollback.

D.

Configure automatic rollback settings in AWS CodeDeploy.

A global company manages multiple AWS accounts by using AWS Control Tower. The company hosts internal applications and public applications.

Each application team in the company has its own AWS account for application hosting. The accounts are consolidated in an organization in AWS Organizations. One of the AWS Control Tower member accounts serves as a centralized DevOps account with CI/CD pipelines that application teams use to deploy applications to their respective target AWS accounts. An 1AM role for deployment exists in the centralized DevOps account.

An application team is attempting to deploy its application to an Amazon Elastic Kubernetes Service (Amazon EKS) cluster in an application AWS account. An 1AM role for deployment exists in the application AWS account. The deployment is through an AWS CodeBuild project that is set up in the centralized DevOps account. The CodeBuild project uses an 1AM service role for CodeBuild. The deployment is failing with an Unauthorized error during attempts to connect to the cross-account EKS cluster from CodeBuild.

Which solution will resolve this error?

A.

Configure the application account ' s deployment 1AM role to have a trust relationship with the centralized DevOps account. Configure the trust relationship to allow the sts:AssumeRole action. Configure the application account ' s deployment 1AM role to have the required access to the EKS cluster. Configure the EKS cluster aws-auth ConfigMap to map the role to the appropriate system permissions.

B.

Configure the centralized DevOps account ' s deployment I AM role to have a trust relationship with the application account. Configure the trust relationship to allow the sts:AssumeRole action. Configure the centralized DevOps account ' s deployment 1AM role to allow the required access to CodeBuild.

C.

Configure the centralized DevOps account ' s deployment 1AM role to have a trust relationship with the application account. Configure the trust relationship to allow the sts:AssumeRoleWithSAML action. Configure the centralized DevOps account ' s deployment 1AM role to allow the required access to CodeBuild.

D.

Configure the application account ' s deployment 1AM role to have a trust relationship with the AWS Control Tower management account. Configure the trust relationship to allow the sts:AssumeRole action. Configure the application account ' s deployment 1AM role to have the required access to the EKS cluster. Configure the EKS cluster aws-auth ConfigMap to map the role to the appropriate system permissions.

A DevOps engineer has created an AWS CloudFormation template that deploys an application on Amazon EC2 instances The EC2 instances run Amazon Linux The application is deployed to the EC2 instances by using shell scripts that contain user data. The EC2 instances have an 1AM instance profile that has an 1AM role with the AmazonSSMManagedlnstanceCore managed policy attached

The DevOps engineer has modified the user data in the CloudFormation template to install a new version of the application. The engineer has also applied the stack update. However, the application was not updated on the running EC2 instances. The engineer needs to ensure that the changes to the application are installed on the running EC2 instances.

Which combination of steps will meet these requirements? (Select TWO.)

A.

Configure the user data content to use the Multipurpose Internet Mail Extensions (MIME) multipart format. Set the scripts-user parameter to always in the text/cloud-config section.

B.

Refactor the user data commands to use the cfn-init helper script. Update the user data to install and configure the cfn-hup and cfn-mit helper scripts to monitor and apply the metadata changes

C.

Configure an EC2 launch template for the EC2 instances. Create a new EC2 Auto Scaling group. Associate the Auto Scaling group with the EC2 launch template Use the AutoScalingScheduledAction update policy for the Auto Scaling group.

D.

Refactor the user data commands to use an AWS Systems Manager document (SSM document). Add an AWS CLI command in the user data to use Systems Manager Run Command to apply the SSM document to the EC2 instances

E.

Refactor the user data command to use an AWS Systems Manager document (SSM document) Use Systems Manager State Manager to create an association between the SSM document and the EC2 instances.

A global company uses Amazon S3 to host its product catalog website in the us-east-1 Region. The company must improve website performance for users across different geographical regions and must reduce the load on the origin server. The company must implement a highly available cross-Region solution that uses Amazon CloudFront. Which solution will meet these requirements with the LEAST operational effort?

A.

Set up multiple CloudFront distributions. Point each distribution to another S3 bucket in a different Region. Use Amazon Route 53 latency-based routing to direct users to the nearest distribution.

B.

Enable S3 replication between the S3 bucket in us-east-1 and the S3 bucket in the different Region.

C.

Enable CloudFront with Origin Shield in us-east-1. Configure global edge locations. Set up cache behaviors with optimal TTLs for static content and dynamic content. Configure origin failover to an S3 bucket in a different Region. Enable S3 replication between the S3 bucket in us-east-1 and the S3 bucket in the different Region.

D.

Enable CloudFront with Origin Shield in us-east-1. Configure Amazon ElastiCache clusters in multiple Regions to serve as a distributed caching layer between CloudFront and the S3 origin. Set up a replication script to synchronize the S3 bucket in us-east-1 to an S3 bucket in a different Region. Use Amazon EventBridge to schedule the script to run once a day.

E.

Enable CloudFront with Origin Shield in the eu-west-1 Region. Configure Regional edge caches. Implement AWS Global Accelerator to route requests to the nearest Regional edge location. Enable S3 replication between the S3 bucket in us-east-1 and an S3 bucket in a different Region.