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To be eligible to take the AWS Certified DevOps Engineer - Professional certification exam, candidates must have already earned the AWS Certified Developer - Associate or AWS Certified SysOps Administrator - Associate certification. Additionally, candidates must have at least two years of experience in deploying and managing applications on AWS using DevOps principles and practices.

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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q305-Q310):

NEW QUESTION # 305
You have been requested to use CloudFormation to maintain version control and achieve automation for the
applications in your organization. How can you best use CloudFormation to keep everything agile and
maintain multiple environments while keeping cost down?

A. Use CloudFormation custom resources to handle dependencies between stacks
B. Combine all resources into one template for version control and automation.
C. Create multiple templates in one CloudFormation stack.
D. Create separate templates based on functionality, create nested stacks with CloudFormation.

Answer: D

Explanation:
Explanation
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:: Cloud Form
ation::Stackresource in your template to reference
other templates. For more information on Cloudformation best practises please refer to the below link:
* http://docs.aws.amazon.com/AWSCIoudFormation/latest/UserGuide/best-practices.
html

NEW QUESTION # 306
What is server immutability?

A. Updating a server after creation.
B. Not updating a server after creation.
C. The inability to change server counts.
D. The ability to change server counts.

Answer: B

Explanation:
... disposable upgrades offer a simpler way to know if your application has unknown dependencies. The underlying EC2 instance usage is considered temporary or ephemeral in nature for the period of deployment until the current release is active. During the new release, a new set of EC2 instances are rolled out by terminating older instances. This type of upgrade technique is more common in an immutable infrastructure.
Reference:
https://d0.awsstatic.com/whitepapers/overview-of-deployment-options-on-aws.pdf

NEW QUESTION # 307
A Solution Architect is designing a disaster recovery solution for a 5 TB Amazon Redshift cluster. The
recovery site must be at least 500 miles (805 kilometers) from the live site.
How should the Architect meet these requirements?

A. Use AWS CloudFormation to deploy the cluster in a second region.
B. Enable cross-region snapshots to a different region.
C. Modify the Redshift cluster to span two regions.
D. Take a snapshot of the cluster and copy it to another Availability Zone.

Answer: C

NEW QUESTION # 308
You are using CloudFormation to launch an EC2 instance and then configure an application after the instance is launched. You need the stack creation of the ELB and Auto Scaling to wait until the EC2 instance is launched and configured properly. How do you do this?

A. Use the WaitCondition resource to hold the creation of the other dependent resources
B. Use the HoldCondition resource to hold the creation of the other dependent resources
C. Use a CreationPolicy to wait for the creation of the other dependent resources >/
D. It is not possible for the stack creation to wait until one service is created and launched

Answer: C

Explanation:
Explanation
When you provision an Amazon EC2 instance in an AWS Cloud Formation stack, you might specify additional actions to configure the instance, such as install software packages or bootstrap applications. Normally, CloudFormation proceeds with stack creation after the instance has been successfully created. However, you can use a Creation Pol icy so that CloudFormation proceeds with stack creation only after your configuration actions are done. That way you'll know your applications are ready to go after stack creation succeeds.
A Creation Policy instructs CloudFormation to wait on an instance until CloudFormation receives the specified number of signals Option A is invalid because this is possible Option B is invalid because this is used make AWS CloudFormation pause the creation of a stack and wait for a signal before it continues to create the stack For more information on this, please visit the below URL:
* https://aws.amazon.com/blogs/devops/use-a-creationpolicy-to-wait-for-on-instance-configurations/

NEW QUESTION # 309
An online retail company based in the United States plans to expand its operations to Europe and Asia in the next six months. Its product currently runs on Amazon EC2 instances behind an Application Load Balancer.
The instances run in an Amazon EC2 Auto Scaling group across multiple Availability Zones. All data is stored in an Amazon Aurora database instance.
When the product is deployed in multiple regions, the company wants a single product catalog across all regions, but for compliance purposes, its customer information and purchases must be kept in each region.
How should the company meet these requirements with the LEAST amount of application changes?

A. Use Amazon DynamoDB global tables for the product catalog and regional tables for the customer information and purchases
B. Use Amazon Redshift for the product catalog and Amazon DynamoDB tables for the customer information and purchases.
C. Use Aurora with read replicas for the product catalog and additional local Aurora instances in each region for the customer information and purchases.
D. Use Aurora for the product catalog and Amazon DynamoDB global tables for the customer information and purchases.

Answer: C

NEW QUESTION # 310
......

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