AWS-Certified-DevOps-Engineer-Professional Free Practice Test

A DevOps engineer is researching the least expensive way to implement an image batch processing cluster on AWS. The application cannot run in Docker containers and must run on Amazon EC2. The batch job stores checkpoint data on an NFS and can tolerate interruptions. Configuring the cluster software from a generic EC2 Linux image takes 30 minutes.
What is the MOST cost-effective solution?

1. A. Use Amazon EFS for checkpoint dat
2. B. To complete the jo
3. C. use an EC2 Auto Scaling group and an On-Demand pricing model to provision EC2 instances temporarily.
4. D. Use GlusterFS on EC2 instances for checkpoint dat
5. E. To run the batch jo
6. F. configure EC2 instances manuall
7. G. When the job completes, shut down the instances manually.
8. H. Use Amazon EFS for checkpoint dat
9. I. Use EC2 Fleet to launch EC2 Spot Instances, and utilize user data to configure the EC2 Linux instance on startup.
10. J. Use Amazon EFS for checkpoint dat
11. K. Use EC2 Fleet to launch EC2 Spot Instance
12. L. Create a custom AMI for the cluster and use the latest AMI when creating instances.

Correct Answer: A

A company maintains a stateless web application that is experiencing inconsistent traffic. The company uses AWS CloudFormation to deploy the application. The application runs on Amazon EC2 On-Demand Instances behind an Application Load Balancer (ALB). The instances run across multiple Availability Zones.
The company wants to include the use of Spot Instances while continuing to use a small number of On-Demand Instances to ensure that the application remains highly available.
What is the MOST cost-effective solution that meets these requirements?

1. A. Add a Spot block resource to the AWS CloudFormation templat
2. B. Use the diversified allocation strategy with step scaling behind the ALB.
3. C. Add a Spot block resource to the AWS CloudFormation templat
4. D. Use the lowest-price allocation strategy with target tracking scaling behind the ALB.
5. E. Add a Spot Fleet resource to the AWS CloudFormation templat
6. F. Use the capacity-optimized allocation strategy with step scaling behind the ALB.
7. G. Add a Spot Fleet resource to the AWS CloudFormation templat
8. H. Use the diversified allocation strategy with scheduled scaling behind the ALB

Correct Answer: C

A company is hosting a web application in an AWS Region. For disaster recovery purposes, a second region is being used as a standby. Disaster recovery requirements state that session data must be replicated between regions in near-real time and 1% of requests should route to the secondary region to continuously verify system functionality. Additionally, if there is a disruption in service in the main region, traffic should be automatically routed to the secondary region, and the secondary region must be able to scale up to handle all traffic.
How should a DevOps Engineer meet these requirements?

1. A. In both regions, deploy the application on AWS Elastic Beanstalk and use Amazon DynamoDB global tables for session dat
2. B. Use an Amazon Route 53 weighted routing policy with health checks to distribute the traffic across the regions.
3. C. In both regions, launch the application in Auto Scaling groups and use DynamoDB for session dat
4. D. Use a Route 53 failover routing policy with health checks to distribute the traffic across the regions.
5. E. In both regions, deploy the application in AWS Lambda, exposed by Amazon API Gateway, and use Amazon RDS PostgreSQL with cross-region replication for session dat
6. F. Deploy the web applicationwith client-side logic to call the API Gateway directly.
7. G. In both regions, launch the application in Auto Scaling groups and use DynamoDB global tables for session dat
8. H. Enable an Amazon CloudFront weighted distribution across region
9. I. Point the Amazon Route 53 DNS record at the CloudFront distribution.

Correct Answer: B

A company is using several AWS CloudFormation templates for deploying infrastructure as code. In most of the deployments, the company uses Amazon EC2 Auto Scaling groups. A DevOps Engineer needs to update the AMIs for the Auto Scaling group in the template if newer AMIs are available.
How can these requirements be met?

1. A. Manage the AMI mappings in the CloudFormation templat
2. B. Use Amazon CloudWatch Events for detecting new AMIs and updating the mapping in the templat
3. C. Reference the map in the launch configuration resource block.
4. D. Use conditions in the AWS CloudFormation template to check if new AMIs are available and return the AMI I
5. E. Reference the returned AMI ID in the launch configuration resource block.
6. F. Use an AWS Lambda-backed custom resource in the template to fetch the AMI ID
7. G. Reference the returned AMI ID in the launch configuration resource block.
8. H. Launch an Amazon EC2 m4.small instance and run a script on it to check for new AMI
9. I. If new AMIs are available, the script should update the launch configuration resource block with the new AMI ID.

Correct Answer: C
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/walkthrough-custom-resources-lambda-lo

A company runs several applications across multiple AWS accounts in an organization in AWS Organizations. Some of the resources are not tagged properly, and the company's finance team cannot determine which costs are associated with which applications. A DevOps engineer must remediate this issue and prevent this issue from happening in the future.
Which combination of actions should the DevOps engineer take to meet these requirements? (Select TWO.)

1. A. Activate the user-defined cost allocation tags in each AWS account.
2. B. Create and attach an SCP that requires a specific tag.
3. C. Define each line of business (LOB) in AWS Budget
4. D. Assign the required tag to each resource.
5. E. Scan all accounts with Tag Edito
6. F. Assign the required tag to each resource.
7. G. Use the budget report to find untagged resource
8. H. Assign the required tag to each resource.

Correct Answer: CD