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Complete DOP-C01 Amazon Web Services Materials

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Question 28

A company runs an application on Amazon EC2 instances behind an Application Load Balancer. The instances run in an Amazon EC2 Auto Scaling group across multiple Availability Zones in us-east1. The application stores data in an Amazon RDS MySQL Multi-AZ DB instance.

A DevOps Engineer wants to modify the current solution and create a hot standby of the environment in another region to minimize downtime if a problem occurs in us-east-1.

Which combination of steps should the DevOps Engineer take to meet these requirements? (Select THREE.)

Options:

A.

Add a health check to the Amazon Route 53 alias record to evaluate the health of the primary region. Use AWS Lambda, configured with an Amazon CloudWatch Events trigger, to elect the Amazon RDS master in the disaster recovery region.

B.

Create a new Application Load Balancer and Auto Scaling group in the disaster recovery region.

C.

Extend the current Auto Scaling group to the subnets in the disaster recovery region.

D.

Enable multi-region failover for the RDS configuration for the database instance.

E.

Deploy a read replica of the RDS instance in the disaster recovery region.

F.

Create an AWS Lambda function to evaluate the health of the primary region. If it fails, modify the Amazon Route 53 record to point at the disaster recovery region and elect the RDS master.

Question 29

A DevOps Engineer must track the health of a stateless RESTful service sitting behind a Classic Load Balancer. The deployment of new application revisions is through a Cl/CD pipeline. If the service's latency increases beyond a defined threshold, deployment should be stopped until the service has recovered.

Which of the following methods allow for the QUICKEST detection time?

Options:

A.

Use Amazon CloudWatch metrics provided by Elastic Load Balancing to calculate average latency. Alarm and stop deployment when latency increases beyond the defined threshold.

B.

Use AWS Lambda and Elastic Load Balancing access logs to detect average latency. Alarm and stop deployment when latency increases beyond the defined threshold.

C.

Use AWS CodeDeploy's Minimum Healthy Hosts setting to define thresholds for rolling back deployments. If these thresholds are breached, roll back the deployment.

D.

Use Metric Filters to parse application logs in Amazon CloudWatch Logs. Create a filter for latency. Alarm and stop deployment when latency increases beyond the defined threshold.

Question 30

You have an ELB setup in AWS with EC2 instances running behind it. You have been requested to monitor the incoming connections to the ELB. Which of the below options can suffice this requirement?

Options:

A.

UseAWSCIoudTrail with your load balancer

B.

Enable access logs on the load balancer

C.

Use a CloudWatch Logs Agent

D.

Create a custom metric CloudWatch filter on your load balancer

Question 31

An ecommerce company uses a large number of Amazon EBS backed Amazon EC2 instances. To decrease manual work across all the instances, a DevOps engineer is tasked with automating restart actions when EC2 instance retirement events are scheduled.

How can this be accomplished?

Options:

A.

Create a scheduled Amazon CloudWatch Events rule to execute an AWS Systems Manager automation document that checks if any EC2 instances are scheduled for retirement once a week. If the instance is scheduled for retirement, the automation document will hibernate the instance.

B.

Enable EC2 Auto Recovery on all of the instances. Create an AWS Config rule to limit the recovery to occur during a maintenance window only.

C.

Reboot all EC2 instances during an approved maintenance window that is oil^ide of standard business hours. Set up Amazon CloudWatch alarms to send a notification in case any instance is failing EC2 instance status checks.

D.

Set up an AWS Health Amazon CloudWatch Events rule to execute AWS Systems Manager automation documents that stop and start the EC2 instance when a retirement scheduled event occurs.

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Exam Code: DOP-C01
Exam Name: AWS Certified DevOps Engineer - Professional
Last Update: Apr 14, 2023
Questions: 272
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