Exam 12: AWS DevOps Engineer - Professional (DOP-C01)

An education company has a Docker-based application running on multiple Amazon EC2 instances in an Amazon ECS cluster. When deploying a new version of the application, the Developer, pushes a new image to a private Docker container registry, and then stops and starts all tasks to ensure that they all have the latest version of the application. The Developer discovers that new tasks are occasionally running with an old image. How can this issue be prevented?

A company has migrated its container-based applications to Amazon EKS and wants to establish automated email notifications. The notifications sent to each email address are for specific activities related to EKS components. The solution will include Amazon SNS topics and an AWS Lambda function to evaluate incoming log events and publish messages to the correct SNS topic. Which logging solution will support these requirements?

You have been asked to de-risk deployments at your company. Specifically, the CEO is concerned about outages that occur because of accidental inconsistencies between Staging and Production, which sometimes cause unexpected behaviors in Production even when Staging tests pass. You already use Docker to get high consistency between Staging and Production for the application environment on your EC2 instances. How do you further de-risk the rest of the execution environment, since in AWS, there are many service components you may use beyond EC2 virtual machines?

For AWS CloudFormation, which stack state refuses UpdateStack calls?

A company is using an AWS CodeBuild project to build and package an application. The packages are copied to a shared Amazon S3 bucket before being deployed across multiple AWS accounts. The buildspec.yml file contains the following: The DevOps Engineer has noticed that anybody with an AWS account is able to download the artifacts. What steps should the DevOps Engineer take to stop this?

A DevOps engineer is designing a multi-Region disaster recovery strategy for an application requiring an RPO of 1 hour and RTO of 4 hours. The application is deployed with an AWS CloudFormation template that creates an Application Load Balancer, Amazon EC2 instances in an Auto Scaling group, and an Amazon RDS Multi-AZ DB instance with 20 GB of allocated storage. The AMI of the application instance does not contain data and has been copied to the destination Region. Which combination of actions will satisfy the recovery objectives at the LOWEST cost? (Choose two.)

A company's legacy application uses IAM user credentials to access resources in the company's AWS Organizations organization. A DevOps engineer needs to ensure new IAM users cannot be created unless the employee creating the IAM user is on an exception list. Which solution will meet these requirements?

A company is reviewing its IAM policies. One policy written by the DevOps Engineer has been flagged as too permissive. The policy is used by an AWS Lambda function that issues a stop command to Amazon EC2 instances tagged with Environment: NonProduction over the weekend. The current policy is: What changes should the Engineer make to achieve a policy of least permission? (Select THREE.)

An Application team has three environments for their application: development, pre-production, and production. The team recently adopted AWS CodePipeline. However, the team has had several deployments of misconfigured or nonfunctional development code into the production environment, resulting in user disruption and downtime. The DevOps Engineer must review the pipeline and add steps to identify problems with the application before it is deployed. What should the Engineer do to identify functional issues during the deployment process? (Choose two.)

A company is using AWS Organizations and wants to implement a governance strategy with the following requirements: AWS resource access is restricted to the same two Regions for all accounts. AWS services are limited to a specific group of authorized services for all accounts. Authentication is provided by Active Directory. Access permissions are organized by job function and are identical in each account. Which solution will meet these requirements?

A DevOps Engineer has been asked by the Security team to ensure that AWS CloudTrail files are not tampered with after being created. Currently, there is a process with multiple trails, using AWS IAM to restrict access to specific trails. The Security team wants to ensure they can trace the integrity of each file and make sure there has been no tampering. Which option will require the LEAST effort to implement and ensure the legitimacy of the file while allowing the Security team to prove the authenticity of the logs?

What is a circular dependency in AWS CloudFormation?

When thinking of AWS OpsWorks, which of the following is true?

A company is migrating its public-facing software to AWS. The company plans to use Amazon EC2 to run application code and Amazon RDS to store all application data. The company wants to primarily use one Region with failover capabilities to a secondary Region and Amazon Route 53 to route traffic. The RPO is 2 hours and the RTO is 4 hours. Which combination of steps should be used to meet these requirements while MINIMIZING cost? (Choose three.)

A DevOps Engineer is building a continuous deployment pipeline for a serverless application using AWS CodePipeline and AWS CodeBuild. The source, build, and test stages have been created with the deploy stage remaining. The company wants to reduce the risk of an unsuccessful deployment by deploying to a small percentage of customers and monitoring this deployment prior to a full release to all customers. How should the deploy stage be configured to meet these requirements?

As part of your continuous deployment process, your application undergoes an I/O load performance test before it is deployed to production using new AMIs. The application uses one Amazon Elastic Block Store (EBS) PIOPS volume per instance and requires consistent I/O performance. Which of the following must be carried out to ensure that I/O load performance tests yield the correct results in a repeatable manner?

A financial institution provides security-hardened AMIs of Red Hat Enterprise Linux 7.4 and Windows Server 2016 for its application teams to use in deployments. A DevOps Engineer needs to implement an automated daily check of each AMI to monitor for the latest CVE. How should the Engineer implement these checks using Amazon Inspector?

Which is not a restriction on AWS EBS Snapshots?

A DevOps Engineer manages a web application that runs on Amazon EC2 instances behind an Application Load Balancer (ALB). The instances run in an EC2 Auto Scaling group across multiple Availability Zones. The Engineer needs to implement a deployment strategy that: Launches a second fleet of instances with the same capacity as the original fleet. Maintains the original fleet unchanged while the second fleet is launched. Transitions traffic to the second fleet when the second fleet is fully deployed. Terminates the original fleet automatically 1 hour after transition. Which solution will satisfy these requirements?

A company has developed a Node.js web application which provides REST services to store and retrieve time series data. The web application is built by the Development team on company laptops, tested locally, and manually deployed to a single on-premises server, which accesses a local MySQL database. The company is starting a trial in two weeks, during which the application will undergo frequent updates based on customer feedback. The following requirements must be met: The team must be able to reliably build, test, and deploy new updates on a daily basis, without downtime or degraded performance. The application must be able to scale to meet an unpredictable number of concurrent users during the trial. Which action will allow the team to quickly meet these objectives?