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Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q374-Q379):

NEW QUESTION # 374
You need to grant a vendor access to your AWS account. They need to be able to read protected messages in a private S3 bucket at their leisure. They also use AWS. What is the best way to accomplish this?

A. Create an EC2 Instance Profile on your account. Grant the associated 1AM role full access to the bucket.
Start an EC2 instance with this Profile and give SSH access to the instance to the vendor.
B. Create an 1AM User with API Access Keys. Grant the User permissions to access the bucket. Give the vendor the AWS Access Key ID and AWS Secret Access Key for the User.
C. Create a cross-account I AM Role with permission to access the bucket, and grant permission to use the Role to the vendor AWS account.
D- Generate a signed S3 PUT URL and a signed S3 PUT URL, both with wildcard values and 2 year durations. Pass the URLs to the vendor.

Answer: C

Explanation:
Explanation
You can use AWS Identity and Access Management (I AM) roles and AWS Security Token Service (STS) to set up cross-account access between AWS accounts. When you assume an 1AM role in another AWS account to obtain cross-account access to services and resources in that account, AWS CloudTrail logs the cross-account activity For more information on Cross Account Access, please visit the below URL:
* https://aws.amazon.com/blogs/security/tag/cross-account-access/

NEW QUESTION # 375
You have an application hosted in AWS. This application was created using Cloudformation Templates and
Autoscaling. Now your application has got a surge of users which is decreasing the performance of the
application. As per your analysis, a change in the instance type to C3 would resolve the issue. Which of the
below option can introduce this change while minimizing downtime for end users?

A. Update the existing launch configuration with the new C3 instance type. Add an UpdatePolicy attribute
to your Auto Scalinggroup that specifies an AutoScaling RollingUpdate in order to avoid downtime.
B. Copy the old launch configuration, and create a new launch configuration with the C3 instances. Update
the Auto Scalinggroup with the new launch configuration. Auto Scaling will then update the instance
type of all running instances.
C. Update the launch configuration in the AWS CloudFormation template with the new C3 instance type.
Add an UpdatePolicy attribute to the Auto Scaling group that specifies an AutoScalingRollingUpdate.
Run a stack update with the updated template.
D. Update the AWS CloudFormation template that contains the launch configuration with the new C3
instance type. Run a stack update with the updated template, and Auto Scaling will then update the
instances one at a time with the new instance type.

Answer: C

Explanation:
Explanation
Ensure first that the cloudformation template is updated with the new instance type.
The AWS::AutoScaling::AutoScalingGroup resource supports an UpdatePoIicy attribute. This is used to
define how an Auto Scalinggroup resource is updated when
an update to the Cloud Formation stack occurs. A common approach to updating an Auto Scaling group is to
perform a rolling update, which is done by specifying
the AutoScalingRollingUpdate policy. This retains the same Auto Scaling group and replaces old instances
with new ones, according to the parameters specified.
Option A is invalid because this will cause an interruption to the users.
Option C is partially correct, but it does not have all the steps as mentioned in option B.
Option D is partially correct, but we need the AutoScalingRollingUpdate attribute to ensure a rolling update is
peformed.
For more information on AutoScaling Rolling updates please refer to the below link:
* https://aws.amazon.com/premiumsupport/knowledge-center/auto-scaling-group-rolling-updates/

NEW QUESTION # 376
Which of the following are advantages of using AWS CodeCommit over hosting your own source code
repository system?

A. Reduction in hardware maintenance costs
B. No specific restriction on files andbranches
C. Reduction in fees paid over licensing
D. All of the above

Answer: D

Explanation:
Explanation
The AWS Documentation mentions the following on CodeCommit
Self-hosted version control systems have many potential drawbacks, including:
Expensive per-developer licensing fees.
High hardware maintenance costs.
High support staffing costs.
Limits on the amount and types of files that can be stored and managed.
Limits on the number of branches, the amount of version history, and other related metadata that can be stored.
For more information on CodeCommit please refer to the below link
* http://docs.aws.amazon.com/codecommit/latest/userguide/wel
come.html

NEW QUESTION # 377
A company develops and maintains a web application using Amazon EC2 instances and an Amazon RDS for SQL Server DB instance in a single Availability Zone. The resources need to run only when new deployments are being tested using AWS CodePipeline. Testing occurs one or more times a week and each test takes 2-3 hours to run. A DevOps engineer wants a solution that does not change the architecture components.
Which solution will meet these requirements in the MOST cost-effective manner?

A. Convert the RDS database to an Amazon Aurora Serverless database.
Use an AWS Lambda function to start and stop the EC2 instances before and after tests.
B. Subscribe Amazon Cloud Watch Events to CodePipeline to trigger AWS Systems Manager Automation documents that start and stop all EC2 and RDS instances before and after deployment tests.
C. Put the EC2 instances into an Auto Scaling group. Schedule scaling to run at the start of the deployment tests.
D. Replace the EC2 instances with EC2 Spot Instances and the RDS database with an RDS Reserved Instance.

Answer: A

NEW QUESTION # 378
A company using AWS CodeCommit for source control wants to automate its continuous integration and continuous deployment pipeline on AWS in its development environment. The company has three requirements:
1. There must be a legal and a security review of any code change to make sure sensitive information is not leaked through the source code.
2. Every change must go through unit testing.
3. Every change must go through a suite of functional testing to ensure functionality.
In addition, the company has the following requirements for automation:
1. Code changes should automatically trigger the CI/CD pipellline.
2. Any failure in the pipeline should notify devops-admin@xyz.com.
3. There must be an approval to stage the assets to Amazon S3 after tests have been performed.
What should a DevOps Engineer do to meet all of these requirements while following CI/CD best practices?

A. Commit to the development branch and trigger AWS CodePipeline from the development branch.
Make an individual stage in CodePipeline for security review, unit tests, functional tests, and manual approval. Use Amazon CloudWatch metrics to detect changes in pipeline stages and Amazon SES for emailing devops-admin@xyz.com.
B. Commit to the development branch and trigger AWS CodePipeline from the development branch.
Make an individual stage in CodePipeline for security review, unit tests, functional tests, and manual approval. Use Amazon CloudWatch Events to detect changes in pipeline stages and Amazon SNS for emailing devops-admin@xyz.com.
C. Commit to mainline and trigger AWS CodePipeline from mainline. Make an individual stage in CodePipeline for security review, unit tests, functional tests, and manual approval. Use AWS CloudTrail logs to detect changes in pipeline stages and Amazon SNS for emailing devops- admin@xyz.com.
D. Commit to mainline and trigger AWS CodePipeline from mainline. Make an individual stage in CodePipeline for security review, unit tests, functional tests, and manual approval. Use Amazon CloudWatch Events to detect changes in pipeline stages and Amazon SES for emailing devops- admin@xyz.com.

Answer: B

NEW QUESTION # 379
......

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