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DOP-C01 Exam Dumps - AWS Certified DevOps Engineer - Professional

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Question # 17

A company wants to use Amazon DynamoDB for maintaining metadata on its forums. See the sample data set in the image below.

A DevOps Engineer is required to define the table schema with the partition key, the sort key, the local secondary index, projected attributes, and fetch operations.

The schema should support the following example searches using the least provisioned read capacity units to minimize cost.

-Search within ForumName for items where the subject starts with "Ëœa'.

-Search forums within the given LastPostDateTime time frame.

-Return the thread value where LastPostDateTime is within the last three months.

Which schema meets the requirements?

Use Subject as the primary key and ForumName as the sort key. Have LSI with LastPostDateTime as the sort key and fetch operations for thread.

Use ForumName as the primary key and Subject as the sort key. Have LSI with LastPostDateTime as the sort key and the projected attribute thread.

Use ForumName as the primary key and Subject as the sort key. Have LSI with Thread as the sort key and the projected attribute LastPostDateTime.

Use Subject as the primary key and ForumName as the sort key. Have LSI with Thread as the sort key and fetch operations for LastPostDateTime.

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Question # 18

An Information Security policy requires that all publicly accessible systems be patched with critical OS security patches within 24 hours of a patch release. All instances are tagged with the Patch Group key set to 0. Two new AWS Systems Manager patch baselines for Windows and Red Hat Enterprise Linux (RHEL) with zero-day delay for security patches of critical severity were created with an auto-approval rule. Patch Group 0 has been associated with the new patch baselines. Which two steps will automate patch compliance and reporting? (Select TWO.)

Create an AWS Systems Manager Maintenance Window and add a target with Patch Group 0. Add a task that runs the AWS-InstallWindowsUpdates document with a daily schedule.

Create an AWS Systems Manager Maintenance Window with a daily schedule and add a target with Patch Group 0. Add a task that runs the AWS-RunPatchBaseline document with the Install action.

Create an AWS Systems Manager State Manager configuration. Associate the AWS-RunPatchBaseline task with the configuration and add a target with Patch Group 0.

Create an AWS Systems Manager Maintenance Window and add a target with Patch Group 0. Add a task that runs the AWS-ApplyPatchBaseline document with a daily schedule.

Use the AWS Systems Manager Run Command to associate the AWS-ApplyPatchBaseline document with instances tagged with Patch Group 0.

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Question # 19

A retail company has adopted AWS OpsWorks for managing its deployments. In the last three months, the company has discovered that some production instances have been restarting without reason. Upon inspection of the AWS CloudTrail logs, a DevOps Engineer determined that those instances were restarted by OpsWorks. The Engineer now wants automated email notifications whenever OpsWorks restarts an instance when the instance is deemed unhealthy or unable to communicate with the service endpoint.

How can the Engineer meet this requirement?

Create a Chef recipe to place a cron to run a custom script within the Amazon EC2 instances that sends an email to the team by using Amazon SES if the OpsWorks agent detects an instance failure.

Create an Amazon SNS topic and create a subscription for this topic that contains the destination email address. Create an Amazon CloudWatch rule: specify as a source and specify auto-healing in the initiated_by details. Use the SNS topic as a target. aws.opsworks

Create an Amazon SNS topic and create a subscription for this topic that contains the destination email address. Create an Amazon CloudWatch rule specify as a source and specify instance-replacement in the initiated_by details. Use the SNS topic as a target. aws.opsworks

Create a subscription for this topic that contains the email address. Enable instance restart notifications within the OpsWorks layer and indicate the destination email address for the notification

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Question # 20

An online company uses Amazon EC2 Auto Scaling extensively to provide an excellent customer experience while minimizing the number of running EC2 instances. The company's self-hosted Puppet environment in the application layer manages the configuration of the instances. The IT manager wants the lowest licensing costs and wants to ensure that whenever the EC2 Auto Scaling group scales down, removed EC2 instances are deregistered from the Puppet master as soon as possible.

How can the requirement be met?

At instance launch time, use EC2 user data to deploy the AWS CodeDeploy agent. Use CodeDeploy to install the Puppet agent. When the Auto Scaling group scales out, run a script to register the newly deployed instances to the Puppet master. When the Auto Scaling group scales in, use the EC2 Auto Scaling lifecycle hook to trigger de-registration from the Puppet master. EC2_INSTANCE_TERMINATING

Bake the AWS CodeDeploy agent into the base AMI. When the Auto Scaling group scales out, use CodeDeploy to install the Puppet agent, and execute a script to register the newly deployed instances to the Puppet master. When the Auto Scaling group scales in, use the CodeDeploy ApplicationStop lifecycle hook to run a script to de-register the instance from the Puppet master.

At instance launch time, use EC2 user data to deploy the AWS CodeDeploy agent. When the Auto Scaling group scales out, use CodeDeploy to install the Puppet agent, and run a script to register the newly deployed instances to the Puppet master. When the Auto Scaling group scales in, use the EC2 user data instance stop script to run a script to de-register the instance from the Puppet master.

Bake the AWS Systems Manager agent into the base AMI. When the Auto Scaling group scales out, use the AWS Systems Manager to install the Puppet agent, and run a script to register the newly deployed instances to the Puppet master. When the Auto Scaling group scales in, use the Systems Manager instance stop lifecycle hook to run a script to de-register the instance from the Puppet master.

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Question # 21

A DevOps engineer is troubleshooting deployments to a new application that runs on Amazon EC2 instances behind an Application Load Balancer. The instances run in an EC2 Auto Scaling group across multiple Availability Zones. Instances sometimes come online before they are ready, which is leading to increased error rates among users. The current health check configuration gives instances a 60-second grace period and considers instances healthy after two 200 response codes from /index.php, a page that may respond intermittently during the deployment process. The development team wants instances to come online as soon as possible.

Which strategy would address this issue?

Increase the instance grace period from 60 seconds to 180 seconds, and the consecutive health check requirement from 2 to 3.

Increase the instance grace period from 60 seconds to 120 seconds, and change the response code requirement from 200 to 204.

Modify the deployment script to create a /health-check.php file when the deployment begins, then modify the health check path to point to that file.

Modify the deployment script to create a /health-check.php file when all tasks are complete, then modify the health check path to point to that file.

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Question # 22

You have an application consisting of a stateless web server tier running on Amazon EC2 instances behind load balancer, and are using Amazon RDS with read replicas. Which of the following methods should you use to implement a self-healing and cost-effective architecture? Choose 2 answers from the optionsgiven below

Set up a third-party monitoring solution on a cluster of Amazon EC2 instances in order to emit custom Cloud Watch metrics to trigger the termination of unhealthy Amazon EC2 instances.

Set up scripts on each Amazon EC2 instance to frequently send ICMP pings to the load balancer in order to determine which instance is unhealthy and replace it.

Set up an Auto Scalinggroup for the web server tier along with an Auto Scaling policy that uses the Amazon RDS DB CPU utilization Cloud Watch metric to scale the instances.

Set up an Auto Scalinggroup for the web server tier along with an Auto Scaling policy that uses the Amazon EC2 CPU utilization CloudWatch metric to scale the instances.

Use a larger Amazon EC2 instance type for the web server tier and a larger DB instance type for the data storage layer to ensure that they don't become unhealthy.

Set up an Auto Scalinggroup for the database tier along with an Auto Scaling policy that uses the Amazon RDS read replica lag CloudWatch metric to scale out the Amazon RDS read replicas.

Use an Amazon RDS Multi-AZ deployment.

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Question # 23

A company is using tagging to allocate AWS costs. The company has Amazon EC2 instances that run in Auto Scaling groups. The Amazon Elastic Block Store (Amazon EBS) volumes that are attached to the EC2 instances are being created without the appropriate cost center tags. A DevOps engineer must ensure that the new EBS volumes are properly tagged.

What is the MOST efficient solution that meets this requirement?

Create a lifecycle hook on the autoscaling:EC2_INSTANCE_TERMINATING instance state that attaches the cost center tags to the EBS volumes.

Update the Auto Scaling group launch template to include the cost center tags for EBS volumes.

Update the Auto Scaling group to include the cost center tags. Set the PropagateAtLaunch property to true.

Use Tag Editor to search for EBS volumes that are missing the tags and to add the cost center tags to the volumes.

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Question # 24

A development team wants to use AWS CIoudFormation slacks to deploy an application However, the developer 1AM role does not have the required permissions to provision the resources that are specified in the AWS Cloud Formation template A DevOps engineer needs to implement a solution that allows the developers to deploy the stacks The solution must follow the principle of least privilege

Which solution will meet these requirements?

Create an 1AM policy that allows the developers to provision the required resources Attach the policy to the developer 1AM role.

Create an 1AM policy that allows full access to AWS CIoudFormation Attach the policy to the developer 1AM role

Create an AWS CIoudFormation service role that has the required permissions Grant the developer 1AM role a cloudformation.'' action Use the new service role during stack deployments

Create an AWS CIoudFormation service role that has the required permissions Grant the developer IAM role the Iam PassRole permission Use the new service role during stack deployments

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