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

What is a circular dependency in AWS CIoudFormation?

1. A. When a Template references an earlier version of itself.
2. B. When Nested Stacks depend on each other.
3. C. When Resources form a DependOn loop.
4. D. When a Template references a region, which references the original Templat

Correct Answer: C
To resolve a dependency error, add a DependsOn attribute to resources that depend on other resources in your template. In some cases, you must explicitly declare dependencies so that AWS CIoudFormation can create or delete resources in the correct order. For example, if you create an Elastic IP and a VPC
with an Internet gateway in the same stack, the Elastic IP must depend on the Internet gateway attachment. For additional information, see DependsOn Attribute.
Reference: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/troubleshooting.htm|#troub|eshootin g-errors-dependence-error

Which of the following tools does not directly support AWS OpsWorks, for monitoring your stacks?

1. A. AWS Config
2. B. Amazon CIoudWatch Nletrics
3. C. AWS CloudTraiI
4. D. Amazon CIoudWatch Logs

Correct Answer: A
You can monitor your stacks in the following ways: AWS OpsWorks uses Amazon CIoudWatch to provide thirteen custom metrics with detailed monitoring for each instance in the stack; AWS OpsWorks integrates with AWS CIoudTraiI to log every AWS OpsWorks API call and store the data in an Amazon S3 bucket; You can use Amazon CIoudWatch Logs to monitor your stack's system, application, and custom logs. Reference: http://docs.aws.amazon.com/opsworks/latest/userguide/monitoring.htmI

How does Amazon RDS multi Availability Zone model work?

1. A. A second, standby database is deployed and maintained in a different availability zone from master, using synchronous replication.
2. B. A second, standby database is deployed and maintained in a different availability zone from master using asynchronous replication.
3. C. A second, standby database is deployed and maintained in a different region from master using asynchronous replication.
4. D. A second, standby database is deployed and maintained in a different region from master using synchronous replication.

Correct Answer: A
In a MuIti-AZ deployment, Amazon RDS automatically provisions and maintains a synchronous standby replica in a different Availability Zone.
Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.Mu|tiAZ.htmI

When thinking of AWS Elastic Beanstalk, the 'Swap Environment URLs' feature most directly aids in what?

1. A. Immutable Rolling Deployments
2. B. MutabIe Rolling Deployments
3. C. Canary Deployments
4. D. Blue-Green Deployments

Correct Answer: D
Simply upload the new version of your application and let your deployment service (AWS Elastic Beanstalk, AWS CIoudFormation, or AWS OpsWorks) deploy a new version (green). To cut over to the new version, you simply replace the ELB URLs in your DNS records. Elastic Beanstalk has a Swap
Environment URLs feature to facilitate a simpler cutover process.
Reference: https://d0.awsstatic.com/whitepapers/overview-of-deployment-options-on-aws.pdf

Which status represents a failure state in AWS CIoudFormation?

1. A. <code>UPDATE_COMPLETE_CLEANUP_IN_PROGRESS</code>
2. B. DELETE_COMPLETE_WITH_ARTIFACTS
3. C. ROLLBACK_IN_PROGRESS
4. D. ROLLBACK_FAILED

Correct Answer: C
ROLLBACK_IN_PROGRESS means an UpdateStack operation failed and the stack is in the process of trying to return to the valid, pre-update state. UPDATE_COMPLETE_CLEANUP_IN_PROGRESS means an update was successful, and CIoudFormation is deleting any replaced, no longer used resources. ROLLBACK_FA|LED is not a CloudFormation state (but UPDATE_ROLLBACK_FAILED is). DELETE_COMPLETE_W|TH_ART|FACTS does not exist at all.
Reference:
http://docs.aws.amazon.com/AWSCIoudFormation/latest/UserGuide/using-cfn-updating-stacks.html