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Amazon AWS Certified DevOps Engineer - Professional DOP-C02 DOP-C02 Dumps in PDF

Free Amazon DOP-C02 Real Questions (page: 5)

DOP-C02 PDF — 465 Questions

A company that uses electronic health records is running a fleet of Amazon EC2 instances with an Amazon Linux operating system. As part of patient privacy requirements, the company must ensure continuous compliance for patches for operating system and applications running on the EC2 instances.

How can the deployments of the operating system and application patches be automated using a default and custom repository?

  1. Use AWS Systems Manager to create a new patch baseline including the custom repository. Run the AWS- RunPatchBaseline document using the run command to verify and install patches.
  2. Use AWS Direct Connect to integrate the corporate repository and deploy the patches using Amazon CloudWatch scheduled events, then use the CloudWatch dashboard to create reports.
  3. Use yum-config-manager to add the custom repository under /etc/yum.repos.d and run yum- config-manager-enable to activate the repository.
  4. Use AWS Systems Manager to create a new patch baseline including the corporate repository. Run the AWS-AmazonLinuxDefaultPatchBaseline document using the run command to verify and install patches.

Answer(s): A



A company is using AWS CodePipeline to automate its release pipeline. AWS CodeDeploy is being used in the pipeline to deploy an application to Amazon Elastic Container Service (Amazon ECS) using the blue/green deployment model. The company wants to implement scripts to test the green version of the application before shifting traffic. These scripts will complete in 5 minutes or less. If errors are discovered during these tests, the application must be rolled back.

Which strategy will meet these requirements?

  1. Add a stage to the CodePipeline pipeline between the source and deploy stages. Use AWS CodeBuild to create a runtime environment and build commands in the buildspec file to invoke test scripts. If errors are found, use the aws deploy stop-deployment command to stop the deployment.
  2. Add a stage to the CodePipeline pipeline between the source and deploy stages. Use this stage to invoke an AWS Lambda function that will run the test scripts. If errors are found, use the aws deploy stop-
    deployment command to stop the deployment.
  3. Add a hooks section to the CodeDeploy AppSpec file. Use the AfterAllowTestTraffic lifecycle event to invoke an AWS Lambda function to run the test scripts. If errors are found, exit the Lambda function with an error to initiate rollback.
  4. Add a hooks section to the CodeDeploy AppSpec file. Use the AfterAllowTraffic lifecycle event to invoke the test scripts. If errors are found, use the aws deploy stop-deployment CLI command to stop the deployment.

Answer(s): C



A company uses AWS Storage Gateway in file gateway mode in front of an Amazon S3 bucket that is used by multiple resources. In the morning when business begins, users do not see the objects processed by a third party the previous evening. When a DevOps engineer looks directly at the S3 bucket, the data is there, but it is missing in Storage Gateway.

Which solution ensures that all the updated third-party files are available in the morning?

  1. Configure a nightly Amazon EventBridge event to invoke an AWS Lambda function to run the RefreshCache command for Storage Gateway.
  2. Instruct the third party to put data into the S3 bucket using AWS Transfer for SFTP.
  3. Modify Storage Gateway to run in volume gateway mode.
  4. Use S3 Same-Region Replication to replicate any changes made directly in the S3 bucket to Storage Gateway.

Answer(s): A



A DevOps engineer needs to back up sensitive Amazon S3 objects that are stored within an S3 bucket with a private bucket policy using S3 cross-Region replication functionality. The objects need to be copied to a target bucket in a different AWS Region and account.

Which combination of actions should be performed to enable this replication? (Choose three.)

  1. Create a replication IAM role in the source account
  2. Create a replication IAM role in the target account.
  3. Add statements to the source bucket policy allowing the replication IAM role to replicate objects.
  4. Add statements to the target bucket policy allowing the replication IAM role to replicate objects.
  5. Create a replication rule in the source bucket to enable the replication.
  6. Create a replication rule in the target bucket to enable the replication.

Answer(s): A,D,E



A company has multiple member accounts that are part of an organization in AWS Organizations. The security team needs to review every Amazon EC2 security group and their inbound and outbound rules. The security team wants to programmatically retrieve this information from the member accounts using an AWS Lambda function in the management account of the organization.

Which combination of access changes will meet these requirements? (Choose three.)

  1. Create a trust relationship that allows users in the member accounts to assume the management account IAM role.
  2. Create a trust relationship that allows users in the management account to assume the IAM roles of the member accounts.
  3. Create an IAM role in each member account that has access to the AmazonEC2ReadOnlyAccess managed policy.
  4. Create an IAM role in each member account to allow the sts:AssumeRole action against the management account IAM role's ARN.
  5. Create an IAM role in the management account that allows the sts:AssumeRole action against the member account IAM role's ARN.
  6. Create an IAM role in the management account that has access to the AmazonEC2ReadOnlyAccess managed policy.

Answer(s): B,C,E



A space exploration company receives telemetry data from multiple satellites. Small packets of data are received through Amazon API Gateway and are placed directly into an Amazon Simple Queue Service (Amazon SQS) standard queue. A custom application is subscribed to the queue and transforms the data into a standard format.

Because of inconsistencies in the data that the satellites produce, the application is occasionally unable to transform the data. In these cases, the messages remain in the SQS queue. A DevOps engineer must develop a solution that retains the failed messages and makes them available to scientists for review and future processing.

Which solution will meet these requirements?

  1. Configure AWS Lambda to poll the SQS queue and invoke a Lambda function to check whether the queue messages are valid. If validation fails, send a copy of the data that is not valid to an Amazon S3 bucket so that the scientists can review and correct the data. When the data is corrected, amend the message in the SQS queue by using a replay Lambda function with the corrected data.
  2. Convert the SQS standard queue to an SQS FIFO queue. Configure AWS Lambda to poll the SQS queue every 10 minutes by using an Amazon EventBridge schedule. Invoke the Lambda function to identify any messages with a SentTimestamp value that is older than 5 minutes, push the data to the same location as the application's output location, and remove the messages from the queue.
  3. Create an SQS dead-letter queue. Modify the existing queue by including a redrive policy that sets the Maximum Receives setting to 1 and sets the dead-letter queue ARN to the ARN of the newly created queue. Instruct the scientists to use the dead-letter queue to review the data that is not valid. Reprocess this data at a later time.
  4. Configure API Gateway to send messages to different SQS virtual queues that are named for each of the satellites. Update the application to use a new virtual queue for any data that it cannot transform, and send the message to the new virtual queue. Instruct the scientists to use the virtual queue to review the data that is not valid. Reprocess this data at a later time.

Answer(s): C



A company wants to use AWS CloudFormation for infrastructure deployment. The company has strict tagging and resource requirements and wants to limit the deployment to two Regions. Developers will need to deploy multiple versions of the same application.

Which solution ensures resources are deployed in accordance with company policy?

  1. Create AWS Trusted Advisor checks to find and remediate unapproved CloudFormation StackSets.
  2. Create a CloudFormation drift detection operation to find and remediate unapproved CloudFormation StackSets.
  3. Create CloudFormation StackSets with approved CloudFormation templates.
  4. Create AWS Service Catalog products with approved CloudFormation templates.

Answer(s): D



A company requires that its internally facing web application be highly available. The architecture is made up of one Amazon EC2 web server instance and one NAT instance that provides outbound internet access for updates and accessing public data.

Which combination of architecture adjustments should the company implement to achieve high availability? (Choose two.)

  1. Add the NAT instance to an EC2 Auto Scaling group that spans multiple Availability Zones. Update the route tables.
  2. Create additional EC2 instances spanning multiple Availability Zones. Add an Application Load Balancer to split the load between them.
  3. Configure an Application Load Balancer in front of the EC2 instance. Configure Amazon CloudWatch alarms to recover the EC2 instance upon host failure.
  4. Replace the NAT instance with a NAT gateway in each Availability Zone. Update the route tables.
  5. Replace the NAT instance with a NAT gateway that spans multiple Availability Zones. Update the route tables.

Answer(s): B,D



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AI Tutor Explanation
8/8/2026 5:49:22 AM

Question 1:
Correct answer: A
The Lambda function should:

  1. Write a structured log entry to CloudWatch Logs containing:
- API operation - Response code - Application version extracted from the User-Agent header
  1. Configure a CloudWatch Logs metric filter to match those log entries and publish a metric.

  1. Use response code and application version as metric dimensions. This lets the company view metrics separately for each application version and response code, such as:
- GetUser / 200 / v2 - GetUser / 500 / v3
Why the other options are incorrect:
  • B: CloudWatch Logs Insights is for querying and analyzing logs; it does not directly populate CloudWatch metrics this way.
  • C: ALB access logs do not automatically contain custom Lambda response metadata in the required form.
  • D: X-Ray Insights is intended for tracing and anomaly analysis, not extracting arbitrary business metrics with these dimensions.

The key concept is using structured application logs plus CloudWatch Logs metric filters to turn log fields into CloudWatch metrics.

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