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Monitoring and Logging (15%)

• Applying the concepts required for automating the event and monitor management of the environment.
• Applying the concepts required for auditing, logging, and monitoring operating systems, applications & infrastructure;
• Defining how to implement tagging and other metadata strategies;

Target Audience & Peculiarities of AWS DevOps Engineer - Professional Test

This test is suitable for any DevOps engineer or developer who wants to learn how to work with AWS architecture and infrastructure solutions. Besides, it targets specialists who want to learn more about implementing and managing various delivery and control systems, ensure compliance validation, and configure AWS governance processes. This validation is also suitable for those who want to learn how to deploy and define monitoring systems with the help of AWS features. Passing the AWS DevOps Engineer – Professional exam will get you the namesake certificate. Amazon doesn’t have any obligatory prerequisites for eligible candidates. Still, it recommends that they should have previously worked with AWS environments for a minimum of 2 years. Also, they should have previously worked with high-level programming language systems and developed code concepts. Experience in building automated infrastructures is also a huge plus. Another recommendation would be that the examinees have previously administered operating systems and have a solid background in operating development processes and modern operations. As for the details of DOP-C01, its duration is 180 minutes. The candidates should obtain a minimum of 750 points if they want to get the certificate. Besides, they should pay the registration fee of $300. They can also enroll in the practice exam and pay an enrollment fee of $40. Finally, this test is available in the English language, as well as Simplified Chinese, Korean, and Japanese.

Amazon AWS Certified DevOps Engineer - Professional Sample Questions (Q222-Q227):

NEW QUESTION # 222
Your application's Auto Scaling Group scales up too quickly, too much, and stays scaled when traffic decreases. What should you do to fix this?

• A. Use larger instances instead of lots of smaller ones, so the Group stops scaling out so much and wasting resources as the OS level, since the OS uses a higher proportion of resources on smaller instances.
• B. Set a longer cooldown period on the Group, so the system stops overshooting the target capacity.
  The issue is that the scaling system doesn't allow enough time for new instances to begin servicing requests before measuring aggregate load again.
• C. Raise the CloudWatch Alarms threshold associated with your autoscaling group, so the scaling takes more of an increase in demand before beginning.
• D. Calculate the bottleneck or constraint on the compute layer, then select that as the new metric, and set the metric thresholds to the bounding values that begin to affect response latency.

Answer: D Explanation:
Systems will always over-scale unless you choose the metric that runs out first and becomes constrained first. You also need to set the thresholds of the metric based on whether or not latency is affected by the change, to justify adding capacity instead of wasting money.
http://docs.aws.amazon.com/AutoScaling/latest/DeveloperGuide/policy_creating.html
NEW QUESTION # 223
Your DevOps team is responsible for a multi-tier, Windows-based web application consisting of web servers, Amazon RDS database instances, and a load balancer behind Amazon Route53.
You've been asked by your manager to build a cost-effective rolling deployment solution for this web application.
What method should you use?

• A. Re-deploy your application using an AWS CloudFormation template. Use AWS CloudFormation rolling deployment policies, create a new policy for your AWS CloudFormation stack, and initiate an update stack operation to deploy new code.
• B. Re-deploy your application using an AWS CloudFormation template, launch a new AWS CloudFormation stack during each deployment, and then tear down the old stack.
• C. Re-deploy your application on Elastic Beanstalk and take advantage of Elastic BeanStalk rolling updates.
• D. Re-deploy your application on an AWS OpsWorks stack. Use the AWS OpsWorks done stack feature to allow updates between duplicate stacks.

Answer: A
NEW QUESTION # 224
A development team wants to deploy an application using AWS CloudFormation stacks, but the developer IAM role does not currently have the required permissions to provision the resources specified in the CloudFormation template. A DevOps engineer is tasked with allowing developers to deploy the stacks while following the principal of least privilege.
Which solution will meet these requirements?

• A. Create a new IAM role with the required permissions to use as a CloudFormation service role. Grant the developer role a cloudformation:* action.
• B. Create an IAM policy that allows developers to provision the required resources. Attach the policy to the developer role.
• C. Create an IAM policy that allows full access to CloudFormation. Attach the policy to the developer role.
• D. Create a new IAM role with the required permissions to use as a CloudFormation service role. Grant the developer role the iam:PassRole permission.

Answer: A Explanation:
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-iam-servicerole.html
NEW QUESTION # 225
Which of the following features of the Autoscaling Group ensures that additional instances are neither launched or terminated before the previous scaling activity takes effect

• A. Ramp up period
• B. Creation policy
• C. Termination policy
• D. Cool down period

Answer: D Explanation:
Explanation
The AWS documentation mentions
The Auto Scaling cooldown period is a configurable setting for your Auto Scaling group that helps to ensure that Auto Scaling doesn't launch or terminate additional instances before the previous scaling activity takes effect. After the Auto Scaling group dynamically scales using a simple scaling policy. Auto Scaling waits for the cooldown period to complete before resuming scaling activities. When you manually scale your Auto Scaling group, the default is not to wait for the cooldown period, but you can override the default and honor the cooldown period. If an instance becomes unhealthy. Auto Scaling does not wait for the cooldown period to complete before replacing the unhealthy instance For more information on the Cool down period, please refer to the below URL:
* http://docs.ws.amazon.com/autoscaling/latest/userguide/Cooldown.htm
I
NEW QUESTION # 226
You have a requirement to automate the creation of EBS Snapshots. Which of the following can be used to
achieve this in the best way possible.

• A. Use the AWS CodeDeploy service to create a snapshot of the AWS Volumes
• B. Use the AWSConfig service to create a snapshot of the AWS Volumes
• C. Create a powershell script which uses the AWS CLI to get the volumes and then run the script as a cron
  job.
• D. Use Cloudwatch Events to trigger the snapshots of EBS Volumes

Answer: D Explanation:
Explanation
The best is to use the inbuilt service from Cloudwatch, as Cloud watch Events to automate the creation of CBS
Snapshots. With Option A, you would be restricted to
running the powrshell script on Windows machines and maintaining the script itself And then you have the
overhead of having a separate instance just to run that
script.
When you go to Cloudwatch events, you can use the Target as EC2 CreateSnapshot API call as shown below.
Create rules to invoke Targets based on Events happening in your AWS environment.

The AWS Documentation mentions
Amazon Cloud Watch Cvents delivers a near real-time stream of system events that describe changes in
Amazon Web Services (AWS) resources. Using simple rules
that you can quickly set up, you can match events and route them to one or more target functions or streams.
Cloud Watch Cvents becomes aware of operational
changes as they occur. Cloud Watch Cvents responds to these operational changes and takes corrective action
as necessary, by sending messages to respond to the
environment, activating functions, making changes, and capturing state information.
For more information on Cloud watch Cvents, please visit the below U RL:
* http://docs.aws.amazon.com/AmazonCloudWatch/latest/events/Whatl
sCloudWatchCvents.html
NEW QUESTION # 227
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