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Amazon AWS Certified DevOps Engineer - Professional (DOP-C01) Sample Questions (Q142-Q147):

NEW QUESTION # 142
Your application stores sensitive information on an EBS volume attached to your EC2 instance. How can you protect your information? Choose two answers from the options given below

• A. It is not possible to encrypt an EBS volume, you must use a lifecycle policy to transfer data to S3 for encryption.
• B. Create and mount a new, encrypted Amazon EBS volume. Move the data to the new volume. Delete the old Amazon EBS volume *t
• C. Copy the unencrypted snapshot and check the box to encrypt the new snapshot. Volumes restored from this encrypted snapshot will also be encrypted.
• D. Unmount the EBS volume, take a snapshot and encrypt the snapshot. Re-mount the Amazon EBS volume

Answer: B,C Explanation:
Explanation
These steps are given in the AWS documentation
To migrate data between encrypted and unencrypted volumes
1) Create your destination volume (encrypted or unencrypted, depending on your need).
2) Attach the destination volume to the instance that hosts the data to migrate.
3) Make the destination volume available by following the procedures in Making an Amazon EBS Volume Available for Use. For Linux instances, you can create a mount point at /mnt/destination and mount the destination volume there.
4) Copy the data from your source directory to the destination volume. It may be most convenient to use a bulk-copy utility for this.
To encrypt a volume's data by means of snapshot copying
1) Create a snapshot of your unencrypted CBS volume. This snapshot is also unencrypted.
2) Copy the snapshot while applying encryption parameters. The resulting target snapshot is encrypted.
3) Restore the encrypted snapshot to a new volume, which is also encrypted.
For more information on EBS Encryption, please refer to the below document link: from AWS
* http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ EBSEncryption.html
NEW QUESTION # 143
A DevOps Engineer at a startup cloud-based gaming company has the task formalizing deployment strategies.
The strategies must meet the following requirements:
Use standard Git commands, such as git clone and git push for the code repository.
Management tools should maximize the use of platform solutions where possible.
Deployment packages must be immutable and in the form of Docker images.
How can the Engineer meet these requirements?

• A. Use AWS CodePipeline to trigger a build process when software is pushed to an AWS CodeCommit repository CodePipeline will use an AWS CodeBuild build server to build new Docker images.
  CodePipeline will deploy into a second target group in a Kubernetes Cluster hosted on Amazon EC2 behind an Application Load Balancer. Cutover will be managed by swapping the listener rules on the Application Load Balancer.
• B. Use AWS CodePipeline to trigger a build process when software is pushed to a self-hosted GitHub repository. CodePipeline will use a Jenkins build server to build new Docker images. CodePipeline will deploy into a second target group in Amazon ECS behind an Application Load Balancer. Cutover will be managed by swapping the listener rules on the Application Load Balancer.
• C. Use AWS CodePipeline to trigger a build process when software is pushed to a private GitHub repository. CodePipeline will use AWS CodeBuild to build new Docker images. CodePipeline will deploy into a second target group in Amazon ECS behind an Application Load Balancer. Cutover will be managed by swapping the listener rules on the Application Load Balancer.
• D. Use a Jenkins pipeline to trigger a build process when software is pushed to a private GitHub repository.
  AWS CodePipeline will use AWS CodeBuild new Docker images. CodePipeline will deploy into a second target group in Amazon ECS behind an Application Load Balancer. Cutover will be managed by swapping the listener rules on the Application Load Balancer.

Answer: C
NEW QUESTION # 144
Which of the following tools from AWS allows the automatic collection of software inventory from EC2 instances and helps apply OS patches.

• A. EC2Systems Manager
• B. AWSCode Deploy
• C. EC2AMI's
• D. AWSCode Pipeline

Answer: A Explanation:
Explanation
The Amazon CC2 Systems Manager helps you automatically collect software inventory, apply OS patches, create system images, and configure Windows and Linux operating systems. These capabilities enable automated configuration and ongoing management of systems at scale, and help maintain software compliance for instances running in Amazon L~C2 or on-premises.
One feature within Systems Manager is Automation, which can be used to patch, update agents, or bake applications into an Amazon Machine Image (AMI). With Automation, you can avoid the time and effort associated with manual image updates, and instead build AMIs through a streamlined, repeatable, and auditable process.
For more information on EC2 Systems manager, please refer to the below link:
* https://aws.amazon.com/blogs/aws/streamline-ami-maintenance-and-patching-using-amazon-ec2-systems-manag
NEW QUESTION # 145
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? (Select 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 chconfig enabling the script to run during operating system shutdown.
• B. 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.
• C. 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-image and --kms-key arguments to the create-cluster ECS command.
• D. 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.
• E. 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.

Answer: D,E
NEW QUESTION # 146
You need the absolute highest possible network performance for a cluster computing application. You already selected homogeneous instance types supporting 10 gigabit enhanced networking, made sure that your workload was network bound, and put the instances in a placement group. What is the last optimization you can make?

• A. Use 9001 MTU instead of 1500 for Jumbo Frames, to raise packet body to packet overhead ratios.
• B. Segregate the instances into different peered VPCs while keeping them all in a placement group, so each one has its own Internet Gateway.
• C. Bake an AMI for the instances and relaunch, so the instances are fresh in the placement group and do not have noisy neighbors.
• D. Turn off SYN/ACK on your TCP stack or begin using UDP for higher throughput.

Answer: A Explanation:
Explanation
Jumbo frames allow more than 1500 bytes of data by increasing the payload size per packet, and thus increasing the percentage of the packet that is not packet overhead. Fewer packets are needed to send the same amount of usable data. However, outside of a given AWS region (CC2-Classic), a single VPC, or a VPC peering connection, you will experience a maximum path of 1500 MTU. VPN connections and traffic sent over an Internet gateway are limited to 1500 MTU. If packets are over
1500 bytes, they are fragmented, or they are dropped if the Don't Fragment flag is set in the IP header.
For more information on Jumbo Frames, please visit the below URL:
* http://docs.aws.amazon.com/AWSCC2/latest/UserGuide/networkmtu.htm#jumboframeinstances
NEW QUESTION # 147
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