SDLC Automation

A company runs a critical e-commerce application on AWS. They use AWS CodePipeline to manage deployments. The pipeline has a source stage (CodeCommit), a build stage (CodeBuild), and a deploy stage (CodeDeploy to an Auto Scaling group). Recently, a deployment caused a 5-minute outage because the new application version had a bug that caused the health checks to fail. The Auto Scaling group marked instances as unhealthy and replaced them, but during the replacement, traffic was routed to the remaining instances, which also failed health checks, causing a full outage. The company wants to implement a deployment strategy that prevents any traffic from being routed to unhealthy instances and automatically rolls back if the deployment fails. They also want to minimize deployment time and cost. Which solution should the DevOps team implement?

A company is using AWS CodeDeploy to deploy a web application to an Auto Scaling group. The deployment fails with the error 'The overall deployment failed because too many individual instances failed deployment, too few healthy instances are available, or some instances in your deployment group are experiencing problems.' The deployment configuration uses a linear traffic shifting with a 10-minute interval. The application logs show that the new version of the application crashes on startup. What is the MOST effective way to handle this situation to ensure successful future deployments?

Refer to the exhibit. A DevOps engineer ran the above AWS CLI command after a CloudFormation stack update. What does the status 'ROLLBACK_COMPLETE' indicate?

A team uses AWS CodePipeline with multiple stages: Source, Build, Test, and Deploy. The Test stage runs integration tests against a staging environment. Occasionally, the tests fail due to environment issues, not code issues. The team wants to automatically retry the Test stage up to two times if it fails, but not the Deploy stage. How can this be achieved?

A company uses AWS CodeDeploy to deploy a web application to an Auto Scaling group of Amazon EC2 instances. The deployment fails with the error 'The overall deployment failed because too many individual instances failed deployment, too few healthy instances are available for deployment, or some instances in your deployment group are experiencing problems.' The application is deployed to the instances using an in-place deployment. The instances are running Amazon Linux 2. What should the DevOps engineer check first?

An organization uses AWS CodePipeline with multiple stages: Source, Build, Test, and Deploy. The Test stage runs integration tests in CodeBuild. Recently, the pipeline failed because the Test stage took longer than expected, causing a pipeline execution timeout. The pipeline has a default timeout of 7 days. What is the MOST efficient way to set a maximum execution time for the Test stage without affecting other stages?

A company is using AWS CodeDeploy to deploy an application to an Auto Scaling group. The deployment is failing because the new instances are not passing the health checks. The team wants to automatically roll back the deployment if health checks fail. Which THREE steps should the team take?

An organization uses AWS Elastic Beanstalk to deploy a web application. The deployment fails with a '502 Bad Gateway' error after the environment update. The health status shows 'Severe'. Investigation reveals that the application is not binding to the port that the nginx proxy expects. What is the most efficient way to diagnose and resolve this issue?

A development team uses AWS CodeCommit as a source repository for their AWS CodePipeline. They want to automatically trigger a pipeline execution when a new branch is created. Which solution should they implement?

A development team uses AWS CodeBuild to compile a Java application. The build fails during the 'Install' phase with an error: 'Error: JAVA_HOME is not set'. How should the team fix this?

A company uses AWS CodePipeline with Amazon S3 as the source stage. The pipeline triggers on object creation events in the S3 bucket. The development team notices that the pipeline does not trigger when multiple files are uploaded simultaneously. What is the most likely cause?

A development team uses AWS CodeBuild to compile a Java application and run unit tests. The build takes 30 minutes, but the team wants to reduce build time. The codebase has not changed significantly, and dependencies are stable. Which action would be MOST effective in reducing build time?

A company uses AWS Systems Manager Automation to patch EC2 instances. The automation document 'AWS-RunPatchBaseline' runs successfully but some instances are not patched because they are not managed by Systems Manager. What is the most likely reason?

A company uses AWS CodeBuild to run unit tests as part of their CI/CD pipeline. The tests are memory-intensive and occasionally fail due to insufficient memory. The buildspec.yml file uses the default compute type. What is the most cost-effective solution to resolve the memory issue?

A company is using AWS CodeBuild to run integration tests. The tests require access to an Amazon RDS instance in a private subnet. The CodeBuild project is configured with a VPC ID, subnet IDs, and security group IDs. However, the tests fail with a connection timeout. What is the MOST likely cause?

An organization uses AWS CodePipeline to orchestrate deployments to multiple environments (dev, test, prod). Each environment uses a different AWS account. The pipeline uses cross-account actions with IAM roles. Recently, the pipeline failed at the deploy stage for the prod account with the error 'Access Denied' when assuming the cross-account role. The role ARN is correct and the trust policy allows the pipeline's service role. What is the MOST likely cause?

An organization uses AWS CloudFormation to manage infrastructure across multiple accounts using AWS Organizations. They want to enforce that all S3 buckets are encrypted with SSE-S3. A DevOps engineer creates a service control policy (SCP) to deny the creation of any S3 bucket without encryption. However, CloudFormation stack creation fails with an access denied error even when the template includes encryption. What is the most likely cause?

A company is using AWS CodePipeline with multiple stages that include source, build, and deploy. The pipeline uses an Amazon S3 bucket as the source action. The team notices that the pipeline is not automatically starting when new files are uploaded to the S3 bucket. The S3 bucket has versioning enabled. What is the most likely reason?

A DevOps team uses AWS CodePipeline to deploy a static website to Amazon S3. The pipeline has a source stage from CodeCommit, a build stage using CodeBuild that generates the website files, and a deploy stage that copies files to an S3 bucket. The team wants to add a manual approval step before the deploy stage. What should the engineer do?

A company uses AWS CodeBuild to run unit tests and package a Java application. The build process takes 15 minutes. The team wants to reduce build time by caching dependencies. Which approach should the engineer recommend?

A DevOps team uses AWS CodePipeline with an S3 source action and CodeBuild as a build provider. The pipeline has a manual approval step before deployment. Recently, the team noticed that the pipeline automatically starts when a new object is uploaded to the S3 bucket, even if the object is not the source code. They want to ensure that the pipeline only triggers on changes to the source code directory. What is the MOST efficient solution?

A DevOps team uses AWS CodeDeploy to deploy an application to an Auto Scaling group. The deployment fails with a 'HealthCheckFailed' error. The application is running, but the health check endpoint returns HTTP 500. What should the team do to resolve this issue?

A company uses AWS CodeCommit and wants to enforce that all commits to the 'main' branch are signed with a GPG key. Which steps should the DevOps engineer take to enforce this?

An IAM policy is attached to a user who needs to manually start a CodePipeline execution. The pipeline uses an S3 bucket named 'my-artifact-bucket' for artifacts. The user reports that they cannot start the pipeline. Which action is missing from the policy?

A development team uses AWS CodeCommit as a source control repository. A developer accidentally pushed a commit that contains sensitive information (e.g., AWS access keys) to the main branch. The team wants to remove the sensitive data from the repository history completely. Which action should the engineer take?

A DevOps engineer is designing a CI/CD pipeline for a microservices application running on Amazon ECS with Fargate. The team wants to use a blue/green deployment strategy to minimize downtime. Which combination of AWS services and configurations should be used to implement this?

A company runs a critical application on Amazon EC2 instances behind an Application Load Balancer. The application is deployed using AWS CodeDeploy with an in-place deployment configuration. During a recent deployment, the deployment failed because the new application version caused a health check failure, and CodeDeploy did not automatically roll back. What should the engineer do to ensure automatic rollback on health check failure?

A company uses AWS CodeDeploy to deploy a web application to an Auto Scaling group. The deployment fails during the 'ValidateService' lifecycle event. The CloudWatch Agent reports that the target process is running but the health check endpoint returns HTTP 503. The CodeDeploy agent logs show no errors. What is the most likely cause of the failure?

An organization has a AWS CodePipeline that deploys a critical application. The pipeline uses a manual approval step before deploying to production. The team wants to ensure that only authorized users can approve the deployment, and that the approval action is logged for compliance. Which combination of actions should the team take? (Select TWO.)

A company uses AWS CloudFormation to deploy infrastructure. They have a template that creates an Amazon EC2 instance and an Elastic IP address. The template uses the AWS::EC2::EIP resource. The team notices that when they delete the stack, the Elastic IP address is not released, leading to charges. They want to ensure that the Elastic IP is automatically released when the stack is deleted. What should they do?

A team uses AWS CodePipeline to deploy a containerized application to Amazon ECS. The pipeline uses a source stage from CodeCommit, a build stage that builds a Docker image and pushes it to Amazon ECR, and a deploy stage that updates an ECS service. The team wants to add a manual approval step before the deploy stage to allow QA to verify the image. What is the BEST way to implement this?

Refer to the exhibit. A DevOps engineer runs the above commands. The build project 'my-project' uses an S3 bucket as source and another S3 bucket for artifacts. The build fails with an 'Access Denied' error when trying to download the source code. What is the most likely cause?

A company uses AWS CodeCommit for source control. Developers frequently push large binary files, causing the repository size to exceed the recommended limit. What is the most efficient way to manage this situation?

A company has a multi-account AWS environment with separate accounts for development, staging, and production. They want to implement a CI/CD pipeline that deploys to each account sequentially after manual approvals. Which setup allows cross-account deployment with CodePipeline?

A company is using AWS CodeBuild to compile a Java application. The build takes over 30 minutes, causing timeouts. The team has already increased the build timeout to the maximum. Which action would MOST effectively reduce the build time?

A company uses multiple AWS accounts: one for development, one for testing, and one for production. They want to implement a CI/CD pipeline using AWS CodePipeline that deploys the same application to all three accounts. The source code is stored in a CodeCommit repository in the development account. The pipeline should first build the application, then deploy to development, then after approval, deploy to testing, and finally after another approval, deploy to production. The deployment uses AWS CodeDeploy to deploy to EC2 instances in each account. The pipeline will be created in the development account. Which configuration will allow the pipeline to deploy to the testing and production accounts?

An organization is using AWS CodeDeploy to deploy an application to an Auto Scaling group. The deployment fails because the target group is not configured correctly. Which CodeDeploy component is responsible for registering instances with the load balancer?

Refer to the exhibit. The deployment succeeded but the application fails. What is the MOST likely cause?

An organization uses AWS CodePipeline to deploy a serverless application using AWS Lambda and Amazon API Gateway. The pipeline includes a manual approval action. The team wants to ensure that the approval email is sent to multiple approvers and that any one of them can approve or reject. How should the approval action be configured?

A DevOps engineer is setting up a CI/CD pipeline for a Node.js application. The application must be built, tested, and deployed to an Amazon ECS cluster. The team wants to use AWS CodeBuild to run unit tests and package the application as a Docker image, and AWS CodePipeline to orchestrate the workflow. Which artifact type should CodeBuild output to be used by a subsequent CodePipeline action?

A company has a monolith application that takes over an hour to build. The DevOps team wants to implement continuous integration using AWS CodeBuild. The build environment requires a large amount of dependencies that are rarely updated. Which strategy will MINIMIZE build time and cost?

A DevOps engineer is setting up a CI/CD pipeline for a microservices application using AWS CodePipeline. The pipeline includes a Test stage that runs integration tests against a staging environment. The engineer wants to ensure that manual approval is required before deploying to production. Which action should be taken?

An IAM policy is attached to a user. The user is trying to push a commit to the 'main' branch of the 'MyRepo' repository. The push is denied. What is the most likely reason?

A DevOps engineer needs to automatically roll back a CodeDeploy deployment if the number of failed instances exceeds a threshold. Which deployment configuration should be used?

A development team is using AWS CodeCommit to store source code and AWS CodePipeline to automate builds and deployments. The team wants to ensure that builds and tests are triggered only when code is pushed to specific branches, and that manual approval is required before deploying to production. Which CodePipeline configuration should the team implement?

Which TWO steps are required to set up a cross-account CI/CD pipeline where the source stage is in Account A (CodeCommit) and the deploy stage is in Account B (ECS)? (Choose 2.)

A DevOps engineer is setting up an AWS CodePipeline to deploy a web application to an EC2 instance using AWS CodeDeploy. The deployment group uses an in-place deployment configuration. The pipeline's deploy stage fails with the error: 'The overall deployment failed because too many individual instances failed deployment, too few healthy instances are available, or some instances in your deployment group are experiencing problems.' The engineer checks the CodeDeploy logs on the instance and finds that the 'BeforeInstall' lifecycle hook script is failing. The script attempts to download a package from an Amazon S3 bucket that is encrypted with SSE-KMS. What is the MOST likely cause of the failure?

A development team uses AWS CodeCommit for source control. They want to enforce that all commits include a JIRA issue key in the commit message. What is the MOST efficient way to achieve this?

A company uses AWS CloudFormation to deploy a multi-tier application. The stack creation fails with a 'CREATE_FAILED' error for a resource. The engineer wants to troubleshoot the issue. Which TWO steps should the engineer take? (Choose TWO.)

A team wants to automate the deployment of a serverless application using AWS SAM. They have a template.yaml file defining Lambda functions, an API Gateway, and a DynamoDB table. Which command should they use to build and deploy the application?

A development team uses AWS CodeCommit to store source code and AWS CodePipeline to automate builds and deployments. The team wants to ensure that every commit to the main branch triggers a build and deployment to a test environment. Which action should be taken?

A company uses AWS CodePipeline with a GitHub source action. They want to automatically start the pipeline when a pull request is merged to the main branch. However, the pipeline also starts on every push to any branch. How can they limit the pipeline to only trigger on push events to the main branch?

Refer to the exhibit. A team uses this buildspec.yml file in AWS CodeBuild. After the build, they expect the artifacts to be placed in a folder structure, but all files are in the root of the output artifact. What is the reason?

A company uses AWS CodePipeline to deploy a microservices application to Amazon ECS. The pipeline has a source stage (CodeCommit), a build stage (CodeBuild), and a deploy stage (CodeDeploy). Recently, deployments have been failing intermittently during the deploy stage with the error: 'The service has reached its maximum number of running tasks.' How should a DevOps engineer resolve this issue?

A DevOps team uses AWS CodePipeline to deploy a microservices application. The pipeline includes a CodeBuild project that runs unit tests. Recently, builds have been failing intermittently due to test timeouts. The team wants to improve the reliability of the pipeline without increasing the build timeout. Which action should the team take?

A development team uses AWS CodeCommit for source control and AWS CodePipeline for CI/CD. The pipeline has a source stage that pulls from a CodeCommit repository, a build stage using AWS CodeBuild, and a deploy stage that uses AWS CodeDeploy to deploy to an EC2 Auto Scaling group. The team notices that the pipeline frequently fails at the deploy stage with the error 'The deployment failed because the deployment group's deployment configuration specifies a minimum healthy host count of 1, but 0 healthy hosts are available.' What is the MOST likely cause of this issue?

A company uses AWS CodeBuild to run integration tests as part of a pipeline. The tests require access to an Amazon RDS database. The RDS instance is in a private subnet with no public access. The CodeBuild project is configured with a VPC. Which additional configuration is necessary to ensure the build can connect to the database?

A company runs a critical application on Amazon ECS with Fargate. They use blue/green deployments via AWS CodeDeploy. During a recent deployment, the new task set failed health checks and CodeDeploy automatically rolled back. However, the old task set also became unhealthy shortly after rollback. What could explain this?

A company uses AWS CloudFormation to manage infrastructure. The development team wants to promote changes from a development environment to a production environment using change sets. They need to ensure that the production stack is not updated if there are any changes to the stack's IAM policies. Which approach should the team use?

Refer to the exhibit. A CodeBuild project uses this buildspec. The build fails with the error: 'The runtime version specified is not supported in this environment.' What change should be made?

A team uses AWS CloudFormation to manage infrastructure. They have a stack that creates an Amazon RDS instance. During an update, the stack fails with 'CREATE_FAILED' for the DB instance resource, and the error message indicates 'The DB instance already exists.' What is the most likely cause?

A team is using AWS CloudFormation to manage infrastructure. They want to implement a change management process where any modifications to the stack must be reviewed and approved. Which feature should they use?

A company is using AWS CodeDeploy with a blue/green deployment strategy for an Amazon ECS service. After a deployment, the new task set fails health checks, and CodeDeploy automatically rolls back to the original task set. However, the rollback fails because the original task set's desired count is set to 0. What is the most likely cause?

During a deployment using AWS CodeDeploy, the deployment fails with the error 'The overall deployment failed because too many individual instances failed deployment, too few healthy instances are available, or some instances in your deployment group are experiencing problems.' The deployment group is configured with a minimum healthy instances of 75%. What could be the cause?

A DevOps engineer is setting up an AWS CodeBuild project that needs to access resources in a VPC, such as an Amazon RDS database. The engineer has configured the CodeBuild project to run in the VPC. Which additional configuration is required for CodeBuild to pull the build Docker image?

A development team is implementing a CI/CD pipeline using AWS CodePipeline. The pipeline has a Source stage connected to an Amazon S3 bucket, a Build stage using AWS CodeBuild, and a Deploy stage that deploys to an Amazon ECS cluster. The team notices that the pipeline fails intermittently during the Build stage with a 'BUILD_CONTAINER_UNABLE_TO_PULL_IMAGE' error. What is the most likely cause?

A company uses AWS CodePipeline with multiple stages. The pipeline includes a Beta stage that deploys to a test environment and a Prod stage. The team wants to require manual approval before the Prod stage. Which TWO actions should be taken to implement this? (Choose TWO.)

A team uses AWS CodeBuild to run integration tests that require access to an Amazon RDS database. The database is in a private subnet. The CodeBuild project is configured to use a VPC. However, the builds are failing with a timeout connecting to the database. What could be the issue?

Refer to the exhibit. A DevOps engineer deploys this CloudFormation template. The EC2 instance launches, but the httpd service does not start. The engineer connects to the instance and finds that the user data script did not run. What is the most likely cause?

A team uses AWS CodeDeploy to deploy a web application to an Auto Scaling group. The deployment strategy is Blue/Green. During a recent deployment, the new instances passed all health checks, but traffic was not routed to them. What is the most likely reason?

A DevOps engineer is creating an AWS CloudFormation template to deploy a stack that includes an Amazon EC2 instance. The instance needs to be launched in a specific subnet. How should the engineer reference the subnet ID in the template?

A DevOps team is implementing a blue/green deployment strategy for a microservice running on Amazon ECS with AWS CodeDeploy. They want to shift 10% of traffic to the new task set for 5 minutes, then shift the remaining 90%. Which deployment configuration should they use?

A DevOps engineer is reviewing the CodePipeline structure above. The pipeline fails during the Deploy stage with an error: 'The deployment group could not be found.' What is the most likely cause?

A DevOps team uses AWS CodePipeline with a multi-branch strategy. The pipeline should deploy to production only from the 'main' branch, but run unit tests for all branches. How should the team configure the pipeline?