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DOP-C02 Amazon Web Services AWS Certified DevOps Engineer - Professional Free Practice Exam Questions (2026 Updated)

Prepare effectively for your Amazon Web Services DOP-C02 AWS Certified DevOps Engineer - Professional certification with our extensive collection of free, high-quality practice questions. Each question is designed to mirror the actual exam format and objectives, complete with comprehensive answers and detailed explanations. Our materials are regularly updated for 2026, ensuring you have the most current resources to build confidence and succeed on your first attempt.

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A company ' s development team uses AVMS Cloud Formation to deploy its application resources The team must use for an changes to the environment The team cannot use AWS Management Console or the AWS CLI to make manual changes directly.

The team uses a developer IAM role to access the environment The role is configured with the Admnistratoraccess managed policy. The company has created a new Cloudformationdeployment IAM role that has the following policy.

The company wants ensure that only CloudFormation can use the new role. The development team cannot make any manual changes to the deployed resources.

Which combination of steps meet these requirements? (Select THREE.)

A.

Remove the AdministratorAccess policy. Assign the ReadOnIyAccess managed IAM policy to the developer role. Instruct the developers to use the CloudFormationDeployment role as a CloudFormation service role when the developers deploy new stacks.

B.

Update the trust of CloudFormationDeployment role to allow the developer IAM role to assume the CloudFormationDepoyment role.

C.

Configure the IAM to be to get and pass the CloudFormationDeployment role ifcloudformation actions for resources,

D.

Update the trust Of the CloudFormationDepoyment role to anow the cloudformation.amazonaws.com AWS principal to perform the iam:AssumeR01e action

E.

Remove me Administratoraccess policy. Assign the ReadOnly/Access managed IAM policy to the developer role Instruct the developers to assume the CloudFormatondeployment role when the developers new stacks

F.

Add an IAM policy to CloudFormationDeplyment to allow cloudformation * on an Add a policy that allows the iam.PassR01e action for ARN of if iam PassedT0Service equal cloudformation.amazonaws.com

A company ' s application runs on Amazon EC2 instances. The application writes to a log file that records the username, date, time: and source IP address of the login. The log is published to a log group in Amazon CloudWatch Logs

The company is performing a root cause analysis for an event that occurred on the previous day The company needs to know the number of logins for a specific user from the past 7 days

Which solution will provide this information ' ?

A.

Create a CloudWatch Logs metric filter on the log group Use a filter pattern that matches the username. Publish a CloudWatch metric that sums the number of logins over the past 7 days.

B.

Create a CloudWatch Logs subscription on the log group Use a filter pattern that matches the username Publish a CloudWatch metric that sums the number of logins over the past 7 days

C.

Create a CloudWatch Logs Insights query that uses an aggregation function to count the number of logins for the username over the past 7 days. Run the query against the log group

D.

Create a CloudWatch dashboard. Add a number widget that has a filter pattern that counts the number of logins for the username over the past 7 days directly from the log group

A DevOps engineer needs to configure a blue green deployment for an existing three-tier application. The application runs on Amazon EC2 instances and uses an Amazon RDS database The EC2 instances run behind an Application Load Balancer (ALB) and are in an Auto Scaling group.

The DevOps engineer has created a launch template and an Auto Scaling group for the blue environment. The DevOps engineer also has created a launch template and an Auto Scaling group for the green environment. Each Auto Scaling group deploys to a matching blue or green target group. The target group also specifies which software blue or green gets loaded on the EC2 instances. The ALB can be configured to send traffic to the blue environments target group or the green environments target group. An Amazon Route 53 record for www example com points to the ALB.

The deployment must move traffic all at once between the software on the blue environment ' s EC2 instances to the newly deployed software on the green environments EC2 instances

What should the DevOps engineer do to meet these requirements?

A.

Start a rolling restart to the Auto Scaling group tor the green environment to deploy the new software on the green environment ' s EC2 instances When the rolling restart is complete, use an AWS CLI command to update the ALB to send traffic to the green environment ' s target group.

B.

Use an AWS CLI command to update the ALB to send traffic to the green environment ' s target group. Then start a rolling restart of the Auto Scaling group for the green environment to deploy the new software on the green environment ' s EC2 instances.

C.

Update the launch template to deploy the green environment ' s software on the blue environment ' s EC2 instances Keep the target groups and Auto Scaling groups unchanged in both environments Perform a rolling restart of the blue environment ' s EC2 instances.

D.

Start a rolling restart of the Auto Scaling group for the green environment to deploy the new software on the green environment ' s EC2 instances When the rolling restart is complete, update the Route 53 DNS to point to the green environments endpoint on the ALB.

A cloud team uses AWS Organizations and AWS IAM Identity Center to manage a company ' s AWS accounts. The company recently established a research team. The research team requires the ability to fully manage the resources in its account. The research team must not be able to create IAM users.

The cloud team creates a Research Administrator permission set in IAM Identity Center for the research team. The permission set has the AdministratorAccess AWS managed policy attached. The cloud team must ensure that no one on the research team can create IAM users.

Which solution will meet these requirements?

A.

Create an IAM policy that denies the iam:CreateUser action. Attach the IAM policy to the Research Administrator permission set.

B.

Create an IAM policy that allows all actions except the iam:CreateUser action. Use the IAM policy to set the permissions boundary for the Research Administrator permission set.

C.

Create an SCP that denies the iam:CreateUser action. Attach the SCP to the research team ' s AWS account.

D.

Create an AWS Lambda function that deletes IAM users. Create an Amazon EventBridge rule that detects the IAM CreateUser event. Configure the rule to invoke the Lambda function.

A company runs a large number of Amazon EC2 instances across public and private subnets in a VPC. A DevOps engineer needs to monitor the EC2 instances for suspicious activity and block traffic from the instances if suspicious activity is identified.

Which solution will meet these requirements in the MOST operationally efficient way?

A.

Enable AWS WAF for the account. Configure Amazon GuardDuty and an Amazon EventBridge rule to filter for GuardDuty finding types that relate to EC2 instances. Create an AWS Lambda function that runs in response to the EventBridge rule and updates the VPC network ACLs to block traffic to the affected instance IP addresses.

B.

Configure Amazon GuardDuty to monitor a threat list. Configure an Amazon EventBridge rule for findings based on the list. Create an AWS Lambda function that runs in response to the EventBridge rule and updates the VPC network ACLs to block traffic to the affected instance IP addresses.

C.

Enable Amazon Inspector for the account. Configure an Amazon EventBridge rule to filter for findings that relate to EC2 instances. Create an AWS Lambda function that runs in response to the EventBridge rule and updates the VPC route table to drop traffic to the instance IP addresses.

D.

Enable AWS Firewall Manager for the account and subscribe to AWS Shield Advanced. Configure a Shield Advanced policy that monitors all the EC2 instances in the account. Enable a remediation action to update the network ACL to block traffic to the host.

A company is running its ecommerce website on AWS. The website is currently hosted on a single Amazon EC2 instance in one Availability Zone. A MySQL database runs on the same EC2 instance. The company needs to eliminate single points of failure in the architecture to improve the website ' s availability and resilience. Which solution will meet these requirements with the LEAST configuration changes to the website?

A.

Deploy the application by using AWS Fargate containers. Migrate the database to Amazon DynamoDB. Use Amazon API Gateway to route requests.

B.

Deploy the application on EC2 instances across multiple Availability Zones. Put the EC2 instances into an Auto Scaling group behind an Application Load Balancer. Migrate the database to Amazon Aurora Multi-AZ. Use Amazon CloudFront for content delivery.

C.

Use AWS Elastic Beanstalk to deploy the application across multiple AWS Regions. Migrate the database to Amazon Redshift. Use Amazon ElastiCache for session management.

D.

Migrate the application to AWS Lambda functions. Use Amazon S3 for static content hosting. Migrate the database to Amazon DocumentDB (with MongoDB compatibility).

A company ' s application development team uses Linux-based Amazon EC2 instances as bastion hosts. Inbound SSH access to the bastion hosts is restricted to specific IP addresses, as defined in the associated security groups. The company ' s security team wants to receive a notification if the security group rules are modified to allow SSH access from any IP address.

What should a DevOps engineer do to meet this requirement?

A.

Create an Amazon EventBridge rule with a source of aws.cloudtrail and the event name AuthorizeSecurityGroupIngress. Define an Amazon Simple Notification Service (Amazon SNS) topic as the target.

B.

Enable Amazon GuardDuty and check the findings for security groups in AWS Security Hub. Configure an Amazon EventBridge rule with a custom pattern that matches GuardDuty events with an output of NON_COMPLIANT. Define an Amazon Simple Notification Service (Amazon SNS) topic as the target.

C.

Create an AWS Config rule by using the restricted-ssh managed rule to check whether security groups disallow unrestricted incoming SSH traffic. Configure automatic remediation to publish a message to an Amazon Simple Notification Service (Amazon SNS) topic.

D.

Enable Amazon Inspector. Include the Common Vulnerabilities and Exposures-1.1 rules package to check the security groups that are associated with the bastion hosts. Configure Amazon Inspector to publish a message to an Amazon Simple Notification Service (Amazon SNS) topic.

A DevOps engineer manages an AWS CodePipeline pipeline that builds and deploys a web application on AWS. The pipeline has a source stage, a build stage, and a deploy stage. When deployed properly, the web application responds with a 200 OK HTTP response code when the URL of the home page is requested. The home page recently returned a 503 HTTP response code after CodePipeline deployed the application. The DevOps engineer needs to add an automated test into the pipeline. The automated test must ensure that the application returns a 200 OK HTTP response code after the application is deployed. The pipeline must fail if the response code is not present during the test. The DevOps engineer has added a CheckURL stage after the deploy stage in the pipeline. What should the DevOps engineer do next to implement the automated test?

A.

Configure the CheckURL stage to use an Amazon CloudWatch action. Configure the action to use a canary synthetic monitoring check on the application URL and to report a success or failure to CodePipeline.

B.

Create an AWS Lambda function to check the response code status of the URL and to report a success or failure to CodePipeline. Configure an action in the CheckURL stage to invoke the Lambda function.

C.

Configure the CheckURL stage to use an AWS CodeDeploy action. Configure the action with an input artifact that is the URL of the application and to report a success or failure to CodePipeline.

D.

Deploy an Amazon API Gateway HTTP API that checks the response code status of the URL and that reports success or failure to CodePipeline. Configure the CheckURL stage to use the AWS Device Farm test action and to provide the API Gateway HTTP API as an input artifact.

A company ' s DevOps engineer is working in a multi-account environment. The company uses AWS Transit Gateway to route all outbound traffic through a network operations account. In the network operations account all account traffic passes through a firewall appliance for inspection before the traffic goes to an internet gateway.

The firewall appliance sends logs to Amazon CloudWatch Logs and includes event seventies of CRITICAL, HIGH, MEDIUM, LOW, and INFO. The security team wants to receive an alert if any CRITICAL events occur.

What should the DevOps engineer do to meet these requirements?

A.

Create an Amazon CloudWatch Synthetics canary to monitor the firewall state. If the firewall reaches a CRITICAL state or logs a CRITICAL event use a CloudWatch alarm to publish a notification to an Amazon Simple Notification Service (Amazon SNS) topic Subscribe the security team ' s email address to the topic.

B.

Create an Amazon CloudWatch metric filter by using a search for CRITICAL events Publish a custom metric for the finding. Use a CloudWatch alarm based on the custom metric to publish a notification to an Amazon Simple Notification Service (Amazon SNS) topic. Subscribe the security team ' s email address to the topic.

C.

Enable Amazon GuardDuty in the network operations account. Configure GuardDuty to monitor flow logs Create an Amazon EventBridge event rule that is invoked by GuardDuty events that are CRITICAL Define an Amazon Simple Notification Service (Amazon SNS) topic as a target Subscribe the security team ' s email address to the topic.

D.

Use AWS Firewall Manager to apply consistent policies across all accounts. Create an Amazon. EventBridge event rule that is invoked by Firewall Manager events that are CRITICAL Define an Amazon Simple Notification Service (Amazon SNS) topic as a target Subscribe the security team ' s email address to the topic.

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.

Deploy 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.

Use 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.

Use 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.

Use 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.

A company is implementing a CI/CD pipeline for an application by using AWS CodePipeline and AWS CodeBuild. The company needs a solution to run unit tests and automatically generate code coverage reports before any code is deployed to production. The CI/CD pipeline execution must fail if the code coverage is less than 80%.

Which solution will meet these requirements?

A.

Create an AWS Lambda function to run unit tests and generate code coverage reports. Add a Lambda invoke action to a stage in the CodePipeline pipeline. Create an Amazon EventBridge scheduled rule to run hourly to monitor the Lambda function ' s output. Configure the rule to fail the pipeline if coverage is less than 80%.

B.

Create an AWS Step Functions workflow to run unit tests and generate code coverage reports. Add a Step Functions test action to a stage in the CodePipeline pipeline to invoke the workflow. Configure the workflow to fail if the code coverage is less than 80%.

C.

Create a CodeBuild project with a buildspec.yml file that includes commands to run unit tests and generate code coverage reports. Add a CodeBuild test action to a stage in the CodePipeline pipeline. Configure the CodeBuild test action to use the source artifacts from the source action as input. Modify the buildspec.yml file to fail the build if coverage is less than 80%.

D.

Create a CodeBuild project with Jenkins installed. Configure Jenkins to run unit tests and generate code coverage reports. Add a Jenkins test action to a stage in the CodePipeline pipeline. Configure the Jenkins test action to output the coverage report as an output artifact. Configure an approval action to fail the pipeline if code coverage is less than 80%.

A company runs applications on Windows and Linux Amazon EC2 instances The instances run across multiple Availability Zones In an AWS Region. The company uses Auto Scaling groups for each application.

The company needs a durable storage solution for the instances. The solution must use SMB for Windows and must use NFS for Linux. The solution must also have sub-millisecond latencies. All instances will read and write the data.

Which combination of steps will meet these requirements? (Select THREE.)

A.

Create an Amazon Elastic File System (Amazon EFS) file system that has targets in multiple Availability Zones

B.

Create an Amazon FSx for NetApp ONTAP Multi-AZ file system.

C.

Create a General Purpose SSD (gp3) Amazon Elastic Block Store (Amazon EBS) volume to use for shared storage.

D.

Update the user data for each application ' s launch template to mount the file system

E.

Perform an instance refresh on each Auto Scaling group.

F.

Update the EC2 instances for each application to mount the file system when new instances are launched

A company has multiple AWS accounts. The company uses AWS IAM Identity Center (AWS Single Sign-On) that is integrated with AWS Toolkit for Microsoft Azure DevOps. The attributes for access control feature is enabled in IAM Identity Center.

The attribute mapping list contains two entries. The department key is mapped to ${path:enterprise.department}. The costCenter key is mapped to ${path:enterprise.costCenter}.

All existing Amazon EC2 instances have a department tag that corresponds to three company departments (d1, d2, d3). A DevOps engineer must create policies based on the matching attributes. The policies must minimize administrative effort and must grant each Azure AD user access to only the EC2 instances that are tagged with the user’s respective department name.

Which condition key should the DevOps engineer include in the custom permissions policies to meet these requirements?

A.

B.

C.

D.

A company is migrating an application to Amazon Elastic Container Service (Amazon ECS). The company wants to consolidate log data in Amazon CloudWatch in the us-west-2 Region. No CloudWatch log groups currently exist for Amazon ECS.

The company receives the following error code when an ECS task attempts to launch:

“service my-service-name was unable to place a task because no container instance met all of its requirements.”

The ECS task definition includes the following container log configuration:

" logConfiguration " : {

" logDriver " : " awslogs " ,

" options " : {

" awslogs-create-group " : " true " ,

" awslogs-group " : " awslogs-mytask " ,

" awslogs-region " : " us-west-2 " ,

" awslogs-stream-prefix " : " awslogs-mytask " ,

" mode " : " non-blocking " ,

" max-buffer-size " : " 25m "

}

}

The ECS cluster uses an Amazon EC2 Auto Scaling group to provide capacity for tasks. EC2 instances launch an Amazon ECS-optimized AMI.

Which solution will fix the problem?

A.

Modify the ECS infrastructure IAM role to add the logs:CreateLogStream and logs:PutLogEvents permissions.

B.

Modify the ECS log configuration to use blocking mode.

C.

Modify the ECS container instance IAM role to add the logs:CreateLogStream and logs:PutLogEvents permissions.

D.

Modify the ECS log configuration by setting the awslogs-create-group option to false.

A DevOps engineer is working on a member account in an organization in AWS Organizations with all features enabled. The account has sensitive data stored in Amazon S3 buckets.

The DevOps engineer must ensure that all public access to S3 buckets in the account is blocked. If the account-level public access settings change in the future, the changes must be reverted automatically so that all public access is blocked again.

Which solution meets these requirements?

A.

Enable AWS Security Hub in the account. Enable the Security Hub control to evaluate the account-level block public access settings. Enable automated remediation for the Security Hub control.

B.

Set up AWS Config in the account. Create an AWS Config managed rule that evaluates the S3 block public access settings. Enable automated remediation for the rule by using a predefined AWS Systems Manager runbook to configure S3 block public access settings.

C.

In the organization ' s management account, create an SCP that denies S3 actions from outside the AWS account. Attach the SCP to the member account.

D.

Enable Amazon Macie in the account. Create an Amazon EventBridge rule with an event pattern that matches Macie policy findings. Configure the rule with an EventBridge target to run a predefined AWS Systems Manager runbook to configure S3 block public access settings.

A development team manually builds a local artifact. The development team moves the artifact to an Amazon S3 bucket to support an application. The application has a local cache that must be cleared when the development team deploys the application to Amazon EC2 instances. For each deployment, the development team runs a command to clear the cache, download the artifact from the S3 bucket, and unzip the artifact to complete the deployment.

The development team wants to migrate the deployment process to a CI/CD process and to track the progress of each deployment.

Which combination of actions will meet these requirements with the MOST operational efficiency? (Select THREE.)

A.

Set up an AWS CodeConnections compatible Git repository. Allow developers to merge code into the repository. Use AWS CodeBuild to build an artifact and copy the object into the S3 bucket. Configure CodeBuild to run for every merge into the main branch.

B.

Create a custom script to clear the cache. Specify the script in the BeforeInstall lifecycle hook in the AppSpec file.

C.

Create user data for each EC2 instance that contains the cache clearing script. Test the application after deployment. If the deployment is not successful, then redeploy.

D.

Use AWS CodePipeline to deploy the application. Set up an AWS CodeConnections compatible Git repository. Allow developers to merge code into the repository as a source for the pipeline.

E.

Use AWS CodeBuild to build the artifact and place the artifact in the S3 bucket. Use AWS CodeDeploy to deploy the artifact to EC2 instances.

F.

Use AWS Systems Manager to fetch the artifact from the S3 bucket and to deploy the artifact to all the EC2 instances.

To run an application, a DevOps engineer launches an Amazon EC2 instance with public IP addresses in a public subnet. A user data script obtains the application artifacts and installs them on the instances upon launch. A change to the security classification of the application now requires the instances to run with no access to the internet. While the instances launch successfully and show as healthy, the application does not seem to be installed.

Which of the following should successfully install the application while complying with the new rule?

A.

Launch the instances in a public subnet with Elastic IP addresses attached. Once the application is installed and running, run a script to disassociate the Elastic IP addresses afterwards.

B.

Set up a NAT gateway. Deploy the EC2 instances to a private subnet. Update the private subnet ' s route table to use the NAT gateway as the default route.

C.

Publish the application artifacts to an Amazon S3 bucket and create a VPC endpoint for S3. Assign an IAM instance profile to the EC2 instances so they can read the application artifacts from the S3 bucket.

D.

Create a security group for the application instances and allow only outbound traffic to the artifact repository. Remove the security group rule once the install is complete.

An application runs on Amazon EC2 instances behind an Application Load Balancer (ALB). A DevOps engineer is using AWS CodeDeploy to release a new version. The deployment fails during the AlIowTraffic lifecycle event, but a cause for the failure is not indicated in the deployment logs.

What would cause this?

A.

The appspec. yml file contains an invalid script that runs in the AllowTraffic lifecycle hook.

B.

The user who initiated the deployment does not have the necessary permissions to interact with the ALB.

C.

The health checks specified for the ALB target group are misconfigured.

D.

The CodeDeploy agent was not installed in the EC2 instances that are pad of the ALB target group.

A company deployed an Amazon CloudFront distribution that accepts requests and routes to an Amazon API Gateway HTTP API. During a recent security audit, the company discovered that requests from the internet could reach the HTTP API without using the CloudFront distribution.

A DevOps engineer must ensure that connections to the HTTP API use the CloudFront distribution.

Which solution will meet these requirements?

A.

Enable VPC Flow Logs to identify requests that reach the HTTP API.

B.

Deploy AWS WAF in front of the CloudFront distribution.

C.

Implement an identity-based policy on the CloudFront distribution that requires authentication to make requests to the HTTP API.

D.

Implement a custom header in the CloudFront distribution. Implement an AWS Lambda authorizer associated with the HTTP API that verifies the custom header.

A company has developed a web application that conducts seasonal sales on public holidays. The web application is deployed on AWS and uses AWS services for storage, database, computing, and encryption. During seasonal sales, the company expects high network traffic from many users. The company must receive insights regarding any unexpected behavior during the sale. A DevOps team wants to review the insights upon detecting anomalous behaviors during the sale. The DevOps team wants to receive recommended actions to resolve the anomalous behaviors. The recommendations must be provided on the provisioned infrastructure to address issues that might occur in the future.

Which combination of steps will meet these requirements with the LEAST operational overhead? (Select TWO.)

A.

Enable Amazon DevOps Guru in the AWS account. Determine the coverage for DevOps Guru for all supported AWS resources in the account. Use the DevOps Guru dashboard to find the analysis, recommendations, and related metrics.

B.

Create an Amazon Simple Notification Service (Amazon SNS) topic. Configure Amazon DevOps Guru to send notifications about important events to the company when anomalies are identified.

C.

Create an Amazon S3 bucket. Store Amazon CloudWatch logs, AWS CloudTrail data, and AWS Config data in the S3 bucket. Use Amazon Athena to generate insights on the data. Create a dashboard by using Amazon QuickSight.

D.

Configure email message reports for an Amazon QuickSight dashboard. Schedule and send the email reports to the company.

E.

Create an Amazon Simple Notification Service (Amazon SNS) topic. Configure Amazon Athena to send query results about important events to the company when anomalies are identified.

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