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NEW QUESTION 20
An IT department manages a portfolio with Windows and Linux (Amazon and Red Hat Enterprise Linux) servers both on-premises and on AWS. An audit reveals that there is no process for updating OS and core application patches, and that the servers have inconsistent patch levels.
Which of the following provides the MOST reliable and consistent mechanism for updating and maintaining all servers at the recent OS and core application patch levels?

A. Use a shell script to install the latest OS patches on the Linux servers using yum and schedule it to run automatically using cron. Use Windows Update to automatically patch Windows servers.B. Use AWS Systems Manager Parameter Store to securely store credentials for each Linux and Windows server. Create Systems Manager Resource Groups. Use the Systems Manager Run Command to remotely deploy patch updates using the credentials in Systems Manager Parameter StoreC. Install AWS Systems Manager agent on all on-premises and AWS servers. Create Systems Manager Resource Groups. Use Systems Manager Patch Manager with a preconfigured patch baseline to run scheduled patch updates during maintenance windows.D. Install the AWS OpsWorks agent on all on-premises and AWS servers. Create an OpsWorks stack with separate layers for each operating system, and get a recipe from the Chef supermarket to run the patch commands for each layer during maintenance windows.

Answer: B

 

NEW QUESTION 21
A user is defining a policy for the IAM user. Which of the below mentioned elements can be found in an IAM policy?

A. Version ManagementB. Principal ResourceC. Supported Data TypesD. Not Effect

Answer: C

Explanation:
A user can define various elements for an IAM policy. The elements include Version, ID, Statement, Sid, Effect, Principal, Not Principal, Action, Not Action, Resource, Not Resource, Condition, and Supported Data Types Reference:
http://docs.aws.amazon.com/IAM/latest/UserGuide/AccessPolicyLanguage_ElementDescriptions.
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NEW QUESTION 22
You are using AWS Elastic Beanstalk to deploy your application and must make data stored on an Amazon Elastic Block Store (EBS) volume snapshot available to the Amazon Elastic Compute Cloud (EC2) instances. How can you modify your Elastic Beanstalk environment so that the data is added to the Amazon EC2 instances every time you deploy your application?

A. Add commands to a configuration file in the .ebextensions folder of your deployable archive that mount an additional Amazon EBS volume on launch.
Also add a "BlockDeviceMappings" option, and specify the snapshot to use for the block device in the Auto Scaling launch configuration.B. Add commands to the Amazon EC2 user data that will be executed by eb-init, which uses the create- volume Amazon EC2 API or CLI to create a new Amazon EBS volume based on the specified snapshot, and then mounts the volume on launch.C. Add commands to the Chef recipe associated with your environment, use the create-volume Amazon EC2 API or CLI to create a new Amazon EBS volume based on the specified snapshot, and then mount the volume on launch.D. Add commands to a configuration file in the .ebextensions folder of your deployable archive that uses the create-volume Amazon EC2 API or CLI to create a new ephemeral volume based on the specified snapshot and then mounts the volume on launch.

Answer: A

 

NEW QUESTION 23
A company has EC2 instances running in AWS. The EC2 instances are running via an Autoscaling solution.
There is a lot of requests being lost because of the load on the servers. The Autoscaling solution is launching new instances to take the load but there are still some requests which are being lost. Which of the following is likely to provide the most cost-effective solution to avoid losing recently submitted requests? Choose the correct answer from the options given below

A. Pre -warmyour Elastic Load BalancerB. UseanSQS queue to decouple the application componentsC. Keepone extra EC2 instance always powered on in case a spike occursD. Uselarger instances for your application

Answer: B

Explanation:
Explanation
Amazon Simple Queue Service (SQS) is a fully-managed message queuing service for reliably communicating among distributed software components and microservices - at any scale. Building applications from individual components that each perform a discrete function improves scalability and reliability, and is best practice design for modern applications For more information on SQS, please refer to the below link:
* https://aws.amazon.com/sqs/

 

NEW QUESTION 24
Your team wants to begin practicing continuous delivery using CloudFormation, to enable automated builds and deploys of whole, versioned stacks or stack layers. You have a 3-tier, mission-critical system. Which of the following is NOT a best practice for using CloudFormation in a continuous delivery environment?

A. Use the AWS CloudFormation ValidateTemplate call before publishing changes to AWS.B. Model your stack in one template, so you can leverage CloudFormation's state management and dependency resolution to propagate all changes.C. Parametrize the template and use Mappings to ensure your template works in multiple Regions.D. Use CloudFormation to create brand new infrastructure for all stateless resources on each push, and run integration tests on that set of infrastructure.

Answer: B

Explanation:
Explanation
Answer - B
Some of the best practices for Cloudformation are
* Created Nested stacks
As your infrastructure grows, common patterns can emerge in which you declare the same components in each of your templates. You can separate out these common components and create dedicated templates for them.
That way, you can mix and match different templates but use nested stacks to create a single, unified stack.
Nested stacks are stacks that create other stacks. To create nested stacks, use the AWS::CloudFormation::Stackresource in your template to reference other templates.
* Reuse Templates
After you have your stacks and resources set up, you can reuse your templates to replicate your infrastructure in multiple environments. For example, you can create environments for development, testing, and production so that you can test changes before implementing them into production. To make templates reusable, use the parameters, mappings, and conditions sections so that you can customize your stacks when you create them.
For example, for your development environments, you can specify a lower-cost instance type compared to your production environment, but all other configurations and settings remain the same. For more information on Cloudformation best practises, please visit the below URL:
* http://docs.aws.amazon.com/AWSCIoudFormation/latest/UserGuide/best-practices.
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NEW QUESTION 25
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