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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q125-Q130):

NEW QUESTION # 125
Which of the following Deployment types are available in the CodeDeploy service. Choose 2 answers from the options given below

A. In-place deployment
B. Rolling deployment
C. Blue/green deployment
D. Immutable deployment

Answer: A,C

Explanation:
Explanation
The following deployment types are available
1. In-place deployment: The application on each instance in the deployment group is stopped, the latest application revision is installed, and the new version of the application is started and validated.
2. Blue/green deployment: The instances in a deployment group (the original environment) are replaced by a different set of instances (the replacement environment) For more information on Code Deploy please refer to the below link:
* http://docs.aws.amazon.com/codedeploy/latest/userguide/primary-components.html

NEW QUESTION # 126
For AWS CloudFormation, which stack state refuses UpdateStack calls?

A. <code>UPDATE_ROLLBACK_FAILED</code>
B. <code>UPDATE_ROLLBACK_COMPLETE</code>
C. <code>UPDATE_COMPLETE</code>
D. <code>CREATE_COMPLETE</code>

Answer: A

Explanation:
When a stack is in the UPDATE_ROLLBACK_FAILED state, you can continue rolling it back to return it to a working state (to UPDATE_ROLLBACK_COMPLETE). You cannot update a stack that is in the UPDATE_ROLLBACK_FAILED state. However, if you can continue to roll it back, you can return the stack to its original settings and try to update it again.
Reference: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating- stackscontinueu pdaterollback.html

NEW QUESTION # 127
Management has reported an increase in the monthly bill from Amazon web services, and they are extremely concerned with this increased cost.
Management has asked you to determine the exact cause of this increase.
After reviewing the billing report, you notice an increase in the data transfer cost.
How can you provide management with a better insight into data transfer use?

A. Using Amazon CloudWatch metrics, pull your Elastic Load Balancing outbound data transfer metrics monthly, and include them with your billing report to show which application is causing higher bandwidth usage.
B. Update your Amazon CloudWatch metrics to use five-second granularity, which will give better detailed metrics that can be combined with your billing data to pinpoint anomalies.
C. Deliver custom metrics to Amazon CloudWatch per application that breaks down application data transfer into multiple, more specific data points.
D. Use Amazon CloudWatch Logs to run a map-reduce on your logs to determine high usage and data transfer.

Answer: C

NEW QUESTION # 128
A DevOps team wants to be able to work on the same source code repository. The team has the following requirements for their development workflow and repository access controls:
- Only team members can clone the repository and create new branches.
- A production-ready code state should be isolated from any untested code changes.
- Code changes should be approved by another team member before merging to the production- ready master branch.
- All code change approvals must have an audit record.
- New team members can quickly modify code.
Which combination of actions will these requirements? (Choose three.)

A. Check out the master branch and develop new features locally on a feature branch to keep the production-ready code isolated.
Ask team members to review the changes before committing the changes locally.
B. Create a pull request so other team members can review the code changes.
Implement any suggestions, pull any additional changes from the master branch, and push to the feature branch again.
Merge the master branch with the feature branch.
C. Create a pull request so other team members can review the code changes.
Implement any suggestions, pull any additional changes from the master branch, resolve any conflicts, and push to the feature branch again.
Merge the feature branch with the master branch.
D. Create an AWS CodeCommit repository and an IAM role with permissions to read/write changes to the repository.
Attach this IAM role to a single IAM user.
Ensure each member of the team uses this IAM user.
Provide new team members the credentials to this IAM user.
E. Create an AWS CodeCommit repository and an IAM group with permissions to read/write changes to the repository.
Add new team members to this group.
F. Create a local feature branch from the master branch for new features.
Commit the new code and push the changes to the feature branch in the repository.

Answer: C,E,F

NEW QUESTION # 129
You have been asked to de-risk deployments at your company. Specifically, the CEO is concerned about
outages that occur because of accidental inconsistencies between Staging and Production, which
sometimes cause unexpected behaviors in Production even when Staging tests pass.
You already use Docker to get high consistency between Staging and Production for the application
environment on your EC2 instances. How do you further de-risk the rest of the execution environment,
since in AWS, there are many service components you may use beyond EC2 virtual machines?

A. Develop models of your entire cloud system in CloudFormation. Use this model in Staging and
Production to achieve greater parity.
B. Use AWS ECS and Docker clustering. This will make sure that the AMIs and machine sizes are the
same across both environments.
C. Use AMIs to ensure the whole machine, including the kernel of the virual machines, is consistent, since
Docker uses Linux Container (LXC) technology, and we need to make sure the container environment is
consistent.
D. Use AWS Config to force the Staging and Production stacks to have configuration parity. Any
differences will be detected for you so you are aware of risks.

Answer: A

Explanation:
Only CloudFormation's JSON Templates allow declarative version control of repeatably deployable
models of entire AWS clouds.
Reference: https://blogs.aws.amazon.com/application-management/blog/category/Best+practices

NEW QUESTION # 130
......

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