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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q154-Q159):

NEW QUESTION # 154
You currently have a set of instances running on your Opswork stacks. You need to install security updates on these servers. What does AWS recommend in terms of how the security updates should be deployed?
Choose 2 answers from the options given below.

A. Create a cloudformation template which can be used to replace the instances.
B. Createand start new instances to replace your current online instances. Then deletethe current instances.
C. OnLinux-based instances in Chef 11.10 or older stacks, run the UpdateDependencies stack command.
D. Createa new Opswork stack with the new instances.

Answer: B,C

Explanation:
Explanation
The AWS Documentation mentions the following
By default, AWS OpsWorks Stacks automatically installs the latest updates during setup, after an instance finishes booting. AWS OpsWorks Stacks does not automatically install updates after an instance is online, to avoid interruptions such as restarting application servers. Instead, you manage updates to your online instances yourself, so you can minimize any disruptions.
We recommend that you use one of the following to update your online instances.
Create and start new instances to replace your current online instances. Then delete the current instances. The new instances will have the latest set of security patches installed during setup.
On Linux-based instances in Chef 11.10 or older stacks, run the Update Dependencies stack command, which installs the current set of security patches and other updates on the specified instances.
For more information on Opswork updates, please visit the below url * http://docs.aws.amazon.com/opsworks/latest/userguide/best-practices-updates.htmI

NEW QUESTION # 155
A company wants to use a grid system for a proprietary enterprise in-memory data store on top of AWS. This system can run in multiple server nodes in any Linux-based distribution. The system must be able to reconfigure the entire cluster every time a node is added or removed. When adding or removing nodes, an /etc./cluster/nodes. config file must be updated, listing the IP addresses of the current node members of that cluster The company wants to automate the task of adding new nodes to a cluster. What can a DevOps Engineer do to meet these requirements?

A. Use AWS OpsWorks Stacks to layer the server nodes of that cluster. Create a Chef recipe that populates the content of the/etc/cluster/nodes config file and restarts the service by using the current members of the layer. Assign that recipe to the Configure lifecycle event.
B. Put the file nodes.config in version control. Create an AWS CodeDeploy deployment configuration and deployment group based on an Amazon EC2 tag value for the cluster nodes. When adding a new node to the cluster, update the file with all tagged instances, and make a commit in version control. Deploy the new file and restart the services.
C. Create an Amazon S3 bucket and upload a version of the etc/cluster/ nodes.config file. Create a crontab script that will poll for that S3 file and download it frequently. Use a process manager, such as Monit or systemd, to restart the cluster services when it detects that the new file was modified.
When adding a node to the cluster, edit the file's most recent members. Upload the new file to the S3 bucket .
D. Create a user data script that lists all members of the current security group of the cluster and automatically updates the /etc/cluster/nodes.config file whenever a new instance is added to the cluster

Answer: B

NEW QUESTION # 156
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 "a'.
-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?

A. 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.
B. 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.
C. 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.
D. 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.

Answer: D

Explanation:
Explanation
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LSI.html

NEW QUESTION # 157
A company is using Docker containers for an application deployment and wants to move its application to AWS. The company currently manages its own clusters on premises to manage the deployment of these containers. It wants to deploy its application to a managed service in AWS and wants the entire flow of the deployment process to be automated. In addition, the company has the following requirements:
- Focus first on the development workload.
- The environment must be easy to manage.
- Deployment should be repeatable and reusable for new environments.
- Store the code in a GitHub repository.
Which solution will meet these requirements?

A. Use AWS CodePipeline that triggers on a commit from the GitHub repository, build the container images with AWS CodeBuild, and publish the container images to Amazon ECR. In the final stage, use AWS CloudFormation to create an Amazon ECS environment that gets the container images from the ECR repository.
B. Set up an Amazon ECS environment. Use AWS CodePipeline to create a pipeline that is triggered on a commit to the GitHub repository. Use AWS CodeBuild to create the container images and AWS CodeDeploy to publish the container image to the ECS environment.
C. Set up an Amazon ECS environment. Use AWS CodePipeline to create a pipeline that is triggered on a commit to the GitHub repository. Use AWS CodeBuild to create the container and store it in the Docker Hub. Use an AWS Lambda function to trigger a deployment and pull the new container image from the Docker Hub.
D. Create a Kubernetes Cluster on Amazon EC2. Use AWS CodePipeline to create a pipeline that is triggered when the code is committed to the repository. Create the container images with a Jenkins server on EC2 and store them in the Docker Hub. Use AWS Lambda from the pipeline to trigger the deployment to the Kubernetes Cluster.

Answer: B

NEW QUESTION # 158
A company wants to use Amazon DynamoDB for maintaining metadata on its forums. See the sample data set in the image below.

A. 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.
B. 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.
C. 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.
D. 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.

Answer: D

Explanation:
Explanation
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LSI.html

NEW QUESTION # 159
......

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