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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q111-Q116):

NEW QUESTION # 111
Which of the following is a container for metrics in Cloudwatch?

A. Packages
B. MetricCollection
C. Locale
D. Namespaces

Answer: D

Explanation:
Explanation
The AWS Documentation mentions the following
Cloud Watch namespaces are containers for metrics. Metrics in different namespaces are isolated from each other, so that metrics from different applications are not mistakenly aggregated into the same statistics. All AWS services that provide Amazon Cloud Watch data use a namespace string, beginning with "AWS/". When you create custom metrics, you must also specify a namespace as a container for custom metrics. The following services push metric data points to Cloud Watch.
For more information on Cloudwatch namespaces, please visit the below URL:
* ttp://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/aws-namespaces.html

NEW QUESTION # 112
A company runs a database on a single Amazon EC2 instance in a development environment.
The data is stored on separate Amazon EBS volumes that are attached to the EC2 instance. An Amazon Route 53 A record has been created and configured to point to the EC2 instance. The company would like to automate the recovery of the database instance when an instance or Availability Zone (AZ) fails. The company also wants to keep its costs low. The RTO is 4 hours and RPO is 12 hours. Which solution should a DevOps Engineer implement to meet these requirements?

A. Run the database in an Auto Scaling group with a minimum and maximum instance count of 1 in multiple AZs. Create an AWS Lambda function that is triggered by a scheduled Amazon CloudWatch Events rule every 4 hours to take a snapshot of the data volume and apply a tag.
Have the instance UserData get the latest snapshot, create a new volume from it, and attach and mount the volume. Then start the database and update the Route 53 record.
B. Run the database in an Auto Scaling group with a minimum and maximum instance count of 1 in multiple AZs. Add a lifecycle hook to the Auto Scaling group and define an Amazon CloudWatch Events rule that is triggered when a lifecycle event occurs. Have the CloudWatch Events rule invoke an AWS Lambda function to detach or attach the Amazon EBS data volumes from the EC2 instance based on the event. Configure the EC2 instance UserData to mount the data volumes (retry on failure with a short delay), then start the database and update the Route 53 record.
C. Run the database on two separate EC2 instances in different AZs. Configure one of the instances as a master and the other as a standby. Set up replication between the master and standby instances. Point the Route 53 record to the master. Configure an Amazon CloudWatch Events rule to invoke an AWS Lambda function upon the EC2 instance termination. The Lambda function launches a replacement EC2 instance. If the terminated instance was the active node, the function promotes the standby to master and points the Route 53 record to it.
D. Run the database on two separate EC2 instances in different AZs with one active and the other as a standby. Attach the data volumes to the active instance. Configure an Amazon CloudWatch Events rule to invoke an AWS Lambda function on EC2 instance termination. The Lambda function launches a replacement EC2 instance. If the terminated instance was the active node, then the function attaches the data volumes to the standby node. Start the database and update the Route 53 record.

Answer: A

Explanation:
It restores EBS volumes from snapshot and snapshot is not AZ independent.
Two instances means more costs.
Also Auto Scaling group with min 1 max 1 IS the preferred method for HA.

NEW QUESTION # 113
A company wants to use Amazon ECS to provide a Docker container runtime environment. For compliance reasons, all Amazon EBS volumes used in the ECS cluster must be encrypted. Rolling updates will be made to the cluster instances and the company wants the instances drained of all tasks before being terminated.
How can these requirements be met? (Choose two.)

A. Modify the default ECS AMI user data to create a script that executes docker rm -f {id}for all running container instances. Copy the script to the /etc/init.d/rc.d directory and execute chconfigenabling the script to run during operating system shutdown.
B. Create an IAM role that allows the action ECS::EncryptedImage. Configure the AWS CLI and a profile to use this role. Start the cluster using the AWS CLI providing the --use-encrypted-imageand --kms- keyarguments to the create-clusterECS command.
C. Create an Auto Scaling lifecycle hook backed by an AWS Lambda function that uses the AWS SDK to mark a terminating instance as DRAINING. Prevent the lifecycle hook from completing until the running tasks on the instance are zero.
D. Copy the default AWS CloudFormation template that ECS uses to deploy cluster instances. Modify the template resource EBS configuration setting to set 'Encrypted: True' and include the AWS KMS alias: 'aws/ ebs' to encrypt the AMI.
E. Use AWS CodePipeline to build a pipeline that discovers the latest Amazon-provided ECS AMI, then copies the image to an encrypted AMI outputting the encrypted AMI ID. Use the encrypted AMI ID when deploying the cluster.

Answer: C,D

NEW QUESTION # 114
To run an application, a DevOps Engineer launches an Amazon EC2 instances with public IP addresses in a public subnet. A user data script obtains the application artifacts and installs them on the instances upon launch. A change to the security classification of the application now requires the instances to run with no access to the Internet. While the instances launch successfully and show as healthy, the application does not seem to be installed.
Which of the following should successfully install the application while complying with the new rule?

A. Create a security group for the application instances and whitelist only outbound traffic to the artifact repository. Remove the security group rule once the install is complete.
B. Launch the instances in a public subnet with Elastic IP addresses attached. Once the application is installed and running, run a script to disassociate the Elastic IP addresses afterwards.
C. Set up a NAT gateway. Deploy the EC2 instances to a private subnet. Update the private subnet's route table to use the NAT gateway as the default route.
D. Publish the application artifacts to an Amazon S3 bucket and create a VPC endpoint for S3.
Assign an IAM instance profile to the EC2 instances so they can read the application artifacts from the S3 bucket.

Answer: D

Explanation:
EC2 instances running in private subnets of a VPC can now have controlled access to S3 buckets, objects, and API functions that are in the same region as the VPC. You can use an S3 bucket policy to indicate which VPCs and which VPC Endpoints have access to your S3 buckets
https://aws.amazon.com/pt/blogs/aws/new-vpc-endpoint-for-amazon-s3/

NEW QUESTION # 115
What is web identity federation?

A. Use of an identity provider like Google or Facebook to exchange for temporary AWS security credentials.
B. Use of AWS STS Tokens to log in as a Google or Facebook user.
C. Use of an identity provider like Google or Facebook to become an AWS IAM User.
D. Use of AWS IAM User tokens to log in as a Google or Facebook user.

Answer: A

Explanation:
... users of your app can sign in using a well-known identity provider (IdP) --such as Login with Amazon, Facebook, Google, or any other OpenID Connect (OIDC)-compatible IdP, receive an authentication token, and then exchange that token for temporary security credentials in AWS that map to an IAM role with permissions to use the resources in your AWS account.
http://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_providers_oidc.html

NEW QUESTION # 116
......

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Amazon DOP-C01 Exam Dumps - Achieve Better Results

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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q111-Q116):

DOP-C01 Exam Torrent - DOP-C01 Quiz Torrent & DOP-C01 Quiz Prep

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