Free Amazon DOP-C02 Exam Questions

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Amazon DOP-C02 Exam Questions
Provided By: Amazon
Exam: AWS Certified DevOps Engineer- Professional
Certification: AWS Certified Professional

Total Questions: 443
Updated On: May 27, 2025
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Question 1
- A company is testing a web application that runs on Amazon EC2 instances behind an Application Load Balancer. The instances run in an Auto Scaling group across multiple Availability Zones. The company uses a blue/green deployment process with immutable instances when deploying new software.
  During testing, users are being automatically logged out of the application at random times. Testers also report that, when a new version of the application is deployed, all users are logged out. The development team needs a solution to ensure users remain logged in across scaling events and application deployments.
  What is the MOST operationally efficient way to ensure users remain logged in?
  
  A : able smart sessions on the load balancer and modify the application to check for an existing session.
  
  B : able session sharing on the load balancer and modify the application to read from the session store.
  
  C : re user session information in an Amazon S3 bucket and modify the application to read session information from the bucket.
  
  D : dify the application to store user session information in an Amazon ElastiCache cluster.
  
  Answer: D
Question 2
- A company has an on-premises application that is written in Go. A DevOps engineer must move the application to AWS. The company's development team wants to enable blue/green deployments and perform A/B testing.
  Which solution will meet these requirements?
  
  A : ploy the application on an Amazon EC2 instance, and create an AMI of the instance. Use the AMI to create an automatic scaling launch configuration that is used in an Auto Scaling group. Use Elastic Load Balancing to distribute traffic. When changes are made to the application, a new AMI will be created, which will initiate an EC2 instance refresh.
  
  B : Amazon Lightsail to deploy the application. Store the application in a zipped format in an Amazon S3 bucket. Use this zipped version to deploy new versions of the application to Lightsail. Use Lightsail deployment options to manage the deployment.
  
  C : AWS CodeArtifact to store the application code. Use AWS CodeDeploy to deploy the application to a fleet of Amazon EC2 instances. Use Elastic Load Balancing to distribute the traffic to the EC2 instances. When making changes to the application, upload a new version to CodeArtifact and create a new CodeDeploy deployment.
  
  D : AWS Elastic Beanstalk to host the application. Store a zipped version of the application in Amazon S3. Use that location to deploy new versions of the application. Use Elastic Beanstalk to manage the deployment options
  
  Answer: D
Question 3
- A leading media company has recently moved its .NET web application from its on-premises network to AWS Elastic Beanstalk for easier deployment and management. An Amazon S3 bucket stores static contents such as PDF files, images, videos, and the likes. An Amazon DynamoDB table stores all of the data of the application. The company has recently launched a series of global marketing campaigns that resulted in unpredictable spikes of incoming traffic. Upon checking, the Operations team discovered that over 80% of the traffic is just duplicate read requests.
  As a DevOps Engineer, how can you improve the application's performance for its users around the world?
  
  A : Lambda@Edge to cache the images stored in the S3 bucket. Use DynamoDB Accelerator (DAX) to cache repeated read requests on the web application.
  
  B : che the images stored in the S3 bucket using the AWS Elemental MediaPackage. Set up a distributed cache layer using an ElastiCache for Memcached Cluster to serve the repeated read requests on the web application.
  
  C : eate a CloudFront web distribution to cache images stored in the S3 bucket. Use DynamoDB Accelerator (DAX) to cache repeated read requests on the web application.
  
  D : che the images stored in the S3 bucket using the AWS Elemental MediaStore. Set up a distributed cache layer using an ElastiCache for Redis Cluster to serve the repeated read requests on the web application.
  
  Answer: C
Question 4
- A company wants to migrate its content sharing web application hosted on Amazon EC2 to a serverless architecture. The company currently deploys changes to its application by creating a new Auto Scaling group of EC2 instances and a new Elastic Load Balancer, and then shifting the traffic away using an Amazon Route 53 weighted routing policy.
  For its new serverless application, the company is planning to use Amazon API Gateway and AWS Lambda. The company will need to update its deployment processes to work with the new application. It will also need to retain the ability to test new features on a small number of users before rolling the features out to the entire user base.
  Which deployment strategy will meet these requirements?
  
  A : AWS CDK to deploy API Gateway and Lambda functions. When code needs to be changed, update the AWS CloudFormation stack and deploy the new version of the APIs and Lambda functions. Use a Route 53 failover routing policy for the canary release strategy.
  
  B : AWS CloudFormation to deploy API Gateway and Lambda functions using Lambda function versions. When code needs to be changed, update the CloudFormation stack with the new Lambda code and update the API versions using a canary release strategy. Promote the new version when testing is complete.
  
  C : AWS Elastic Beanstalk to deploy API Gateway and Lambda functions. When code needs to be changed, deploy a new version of the API and Lambda functions. Shift traffic gradually using an Elastic Beanstalk blue/green deployment.
  
  D : AWS OpsWorks to deploy API Gateway in the service layer and Lambda functions in a custom layer. When code needs to be changed, use OpsWorks to perform a blue/green deployment and shift traffic gradually
  
  Answer: B
Question 5
- A leading IT consulting firm is building a GraphQL API service and a mobile application that lets people post photos and videos of the traffic situations and other issues in the city's public roads. Users can include a text report and constructive feedback to the authorities. The department of public works shall rectify the problems based on the data gathered by the system. In order for the mobile app to run on various mobile and tablet devices, the firm decided to develop it using the React Native mobile framework, which will consume and send data to the GraphQL API. The backend service will be responsible for storing the photos and videos in an Amazon S3 bucket. The API will also need access to the Amazon DynamoDB database to store the text reports. The firm has recently deployed the mobile app prototype, however, during testing, the GraphQL API showed a lot of issues. The team decided to remove the API to proceed with the project and refactor the mobile application instead so that it will directly connect to both DynamoDB and S3 as well as handle user authentication.
  Which of the following options provides a cost-effective and scalable architecture for this project? (Select TWO.)
  
  A : ing the STS AssumeRoleWithWebIdentity API, set up a web identity federation and register with various social identity providers like Facebook, Google, or any other OpenID Connect (OIDC)-compatible IdP. Set up an IAM role for that provider and grant permissions for the IAM role to allow access to Amazon S3 and DynamoDB. Configure the mobile application to use the AWS access and secret keys to store the photos and videos to an S3 bucket and persist the text-based report to a DynamoDB table.
  
  B : ing the STS AssumeRoleWithSAML API, set up a web identity federation and register with various social identity providers like Facebook, Google, or any other OpenID Connect (OIDC)-compatible IdP. Set up an IAM role for that provider and grant permissions for the IAM role to allow access to Amazon S3 and DynamoDB. Configure the mobile app to use the AWS temporary security credentials to store the photos and videos to an S3 bucket and persist the text-based reports to the DynamoDB table.
  
  C : eate an identity pool in AWS Identity and Access Management (IAM) that will be used to store the end-user identities organized for your mobile app. IAM will automatically create the required IAM roles for authenticated identities as well as for unauthenticated 'guest' identities that define permissions for the users. Download and integrate the AWS SDK for React Native with your app, and import the files required to use IAM. Configure your app to pass the credentials provider instance to the client object, which passes the temporary security credentials to the client.
  
  D : eate an identity pool in Amazon Cognito that will be used to store the end-user identities organized for your mobile app. Amazon Cognito will automatically create the required IAM roles for authenticated identities as well as for unauthenticated 'guest' identities that define permissions for Amazon Cognito users. Download and integrate the AWS SDK for React Native with your app, and import the files required to use Amazon Cognito. Configure your app to pass the credentials provider instance to the client object, which passes the temporary security credentials to the client.
  
  E : ing the STS AssumeRoleWithWebIdentity API, set up a web identity federation and register with social identity providers like Facebook, Google or any other OpenID Connect (OIDC)-compatible IdP. Create a new IAM Role and grant permissions to allow access to Amazon S3 and DynamoDB. Configure the mobile application to use the AWS temporary security credentials to store the photos and videos to an S3 bucket and persist the text-based reports to the DynamoDB table.
  
  Answer: A,D

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