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

A retail company has adopted AWS OpsWorks for managing its deployments. In the last three months, the company has discovered that some production instances have been restarting without reason. Upon inspection of the AWS CloudTrail logs, a DevOps Engineer determined that those instances were restarted by OpsWorks. The Engineer now wants automated email notifications whenever OpsWorks restarts an instance when the instance is deemed unhealthy or unable to communicate with the service endpoint.
How can the Engineer meet this requirement?

1. A. Create a Chef recipe to place a cron to run a custom script within the Amazon EC2 instances that sends an email to the team by using Amazon SES if the OpsWorks agent detects an instance failure.
2. B. Create an Amazon SNS topic and create a subscription for this topic that contains the destination email addres
3. C. Create an Amazon CloudWatch rule: specify as a source and specify auto-healing in the initiated_by detail
4. D. Use the SNS topic as a targe
5. E. aws.opsworks
6. F. Create an Amazon SNS topic and create a subscription for this topic that contains the destination email addres
7. G. Create an Amazon CloudWatch rule specify as a source and specify instance-replacement in the initiated_by detail
8. H. Use the SNS topic as a targe
9. I. aws.opsworks
10. J. Create a subscription for this topic that contains the email addres
11. K. Enable instance restart notifications within the OpsWorks layer and indicate the destination email address for the notification

Correct Answer: B

You have just recently deployed an application on EC2 instances behind an ELB. After a couple of weeks, customers are complaining on receiving errors from the application. You want to diagnose the errors and are trying to get errors from the ELB access logs. But the ELB access logs are empty. What is the reason for this.

1. A. You do not have the appropriate permissions to access the logs
2. B. You do not have your CloudWatch metrics correctly configured
3. C. ELB Access logs are only available for a maximum of one week.
4. D. Access logging is an optional feature of Elastic Load Balancing that is disabled by default

Correct Answer: D
Clastic Load Balancing provides access logs that capture detailed information about requests sent to your load balancer. Cach log contains information such as the time the request was received, the client's IP address, latencies, request paths, and server responses. You can use these access logs to analyze traffic patterns and to troubleshoot issues.
Access logging is an optional feature of Elastic Load Balancing that is disabled by default. After you enable access logging for your load balancer. Clastic Load
Balancing captures the logs and stores them in the Amazon S3 bucket that you specify. You can disable access logging at any time.
For more information on CLB access logs, please refer to the below document link: from AWS
http://docs.aws.amazon.com/elasticloadbalancing/latest/classic/access-log-collection.
html

A mobile application running on eight Amazon EC2 instances is relying on a third-party API endpoint. The thirdparty service has a high failure rate because of limited capacity, which is expected to be resolved in a few weeks. In the meantime, the mobile application developers have added a retry mechanism and are logging failed API requests. A DevOps Engineer must automate the monitoring of application logs and count the specific error messages; if there are more than 10 errors within a 1-minute window, the system must issue an alert. How can the requirements be met with MINIMAL management overhead?

1. A. Install the Amazon CloudWatch Logs agent on all instances to push the application logs to CloudWatch Log
2. B. Use metric filters to count the error messages every minute, and trigger a CloudWatch alarm if the count exceeds 10 errors.
3. C. Install the Amazon CloudWatch Logs agent on all instances to push the access logs to CloudWatch Log
4. D. Create CloudWatch Events rule to count the error messages every minute, and trigger a CloudWatch alarm if the count exceeds 10 errors.
5. E. Install the Amazon CloudWatch Logs agent on all instances to push the application logs to CloudWatchLog
6. F. Use a metric filter to generate a custom CloudWatch metric that records the number of failures and triggers a CloudWatch alarm if the custom metric reaches 10 errors in a 1-minute period.
7. G. Deploy a custom script on all instances to check application logs regularly in a cron jo
8. H. Count the number of error messages every minute, and push a data point to a custo
9. I. CloudWatch metri
10. J. Trigger a CloudWatch alarm if the custom metric reaches 10 errors in a 1-minute period.

Correct Answer: C

A company is deploying a new mobile game on AWS for its customers around the world. The Development team uses AWS Code services and must meet the following requirements:
- Clients need to send/receive real-time playing data from the backend frequently and with minimal latency
- Game data must meet the data residency requirement
Which strategy can a DevOps Engineer implement to meet their needs?

1. A. Deploy the backend application to multiple region
2. B. Any update to the code repository triggers a two-stage build and deployment pipelin
3. C. A successful deployment in one region invokes an AWSLambda function to copy the build artifacts to an Amazon S3 bucket in another regio
4. D. After the artifactis copied, it triggers a deployment pipeline in the new region.
5. E. Deploy the backend application to multiple Availability Zones in a single regio
6. F. Create an Amazon CloudFront distribution to serve the application backend to global customer
7. G. Any update to the code repository triggers a two-stage build-and-deployment pipelin
8. H. The pipeline deploys the backend application to all Availability Zones.
9. I. Deploy the backend application to multiple region
10. J. Use AWS Direct Connect to serve the application backend to global customer
11. K. Any update to the code repository triggers a two-stagebuild-and-deployment pipeline in the regio
12. L. After a successful deployment in the region, the pipeline continues to deploy the artifact to another region.
13. M. Deploy the backend application to multiple region
14. N. Any update to the code repository triggers atwo-stage build-and-deployment pipeline in the regio
15. O. After a successful deployment in the region, the pipeline invokes the pipeline in another region and passes the build artifact locatio
16. P. The pipeline uses the artifact location and deploys applications in the new region.

Correct Answer: A

A company has built a web service that runs on Amazon EC2 instances behind an Application Load Balancer (ALB) the company has deployed the application in us-east-1 Amazon Route 53 provides an external DNS that routes traffic from example.com to the application, created with appropriate health checks.
The company has deployed a second environment for the application in eu-west-1 the company wants traffic to be routed to whichever environment results m the best response time for each user. If there is an outage in one Region, traffic should be directed to the other environment.
Which configuration will achieve this requirements?

1. A. •A subdomain us example com with weighted routing the US ALB with weight 2 and the EU ALB with weight 1•Another subdomain eu.example.com with weighted routing the EU ALB with weight 2 and the US ALU with weight 1•Geolocation routing records for example.com North America aliased to us example.com and Europe aliased to eu.example.com
2. B. •A subdomain us example com with latency-based routing the US ALB as the first target and the EU ALB as the second target.•Another subdomain eu.example.com with latency-based routin
3. C. The EU ALB as the first target and the US ALB as the second target.•Failover routing records for example.com aliased to us.example.com as the first target and eu.example.com as the second target.
4. D. •A subdomain us.example.com with failover routing the US ALB as primary and the EU ALB as secondary•Another subdomain eu.example.com with failover routing the EU ALB as primary and the US ALB as secondary•Latency-based routing records for example com that are aliased to us example com and eu.example.com
5. E. •A subdomain us.example.com with multivalue answer routin
6. F. the US ALB as first and the EU ALB as second•Another subdomain eu.example.com with failover routing the EU ALB as first and the US ALB as second•Failover routing records for example.com that are aliased to us.example.com and eu.example.com

Correct Answer: B