Deployment

A developer is using AWS CodeDeploy with a blue/green deployment strategy to update an application running on Amazon ECS with the Fargate launch type. After the new (green) task set is created and traffic is shifted to it, users immediately report errors when trying to write data. The developer discovers that the green task set is connecting to a different database than the blue task set. The database endpoints are configured in the ECS task definition. What is the simplest way to prevent this issue in future deployments?

A developer is using AWS CodeDeploy with a blue/green deployment on an Amazon ECS service running on Fargate. The developer wants to ensure that the new (green) task set is fully healthy and serving traffic before the old (blue) task set is terminated. The deployment should automatically roll back to the blue task set if the green task set fails health checks. Which configuration should the developer set in the CodeDeploy deployment group?

A developer is deploying a serverless application using the AWS Serverless Application Model (SAM). The application includes an Amazon API Gateway HTTP API and several AWS Lambda functions. The developer wants to implement a canary deployment for the API Gateway stage so that 10% of traffic is shifted to the new version for 30 minutes before the remaining 90% is shifted. Which SAM resource attribute should the developer configure on the API Gateway resource?

A developer is deploying a multi-container Docker application on Amazon ECS using the Fargate launch type. The application consists of a web server and a background worker. The web server must be scaled independently and must be accessible from the internet via an Application Load Balancer. The worker should not be accessible from the internet. Which ECS configuration should the developer use?

A developer is using AWS CodeDeploy to deploy an application to an EC2 Auto Scaling group. The application must remain fully available; only one instance should be taken offline at a time. The developer wants to configure the deployment to update instances one by one, ensuring that the deployment fails fast if any instance fails to deploy. Which deployment configuration should the developer choose?

A developer is deploying an application to Amazon ECS using AWS CodeDeploy with a blue/green deployment strategy. After the new task set is created, it fails health checks. The developer wants to immediately route traffic back to the original task set without waiting for CodeDeploy to complete the rollback process. Which action should the developer take?

A developer is deploying a new version of a web application to an EC2 Auto Scaling group using AWS CodeDeploy with a blue/green deployment strategy. The Auto Scaling group is associated with an Application Load Balancer (ALB). The developer wants to ensure that the new instances are registered with the ALB and pass health checks before any traffic is routed to them. Which CodeDeploy configuration should the developer use?

A developer is using AWS CodeDeploy to deploy an application to an Auto Scaling group of EC2 instances. The application is critical and must have zero downtime. The Auto Scaling group currently has 4 instances spread across 2 Availability Zones. Which predefined deployment configuration minimizes the number of instances taken out of service at any given time?

A company uses AWS Elastic Beanstalk to run a web application. They want to deploy a new version with zero downtime and roll forward if successful. They have two environments: a production environment (current version) and a staging environment (new version). After verifying the staging environment, they want to swap the URLs so that production now points to the new version. Which deployment strategy should they use?

A developer is using AWS Elastic Beanstalk to deploy a web application. The application requires a highly available environment across multiple Availability Zones. The developer wants to update the application without any downtime while minimizing the number of new instances launched. Which deployment policy should the developer use?

A developer is deploying a microservices application on Amazon ECS with the Fargate launch type. The application uses an Application Load Balancer (ALB) to route traffic. The developer wants to perform a blue/green deployment with automated traffic shifting using AWS CodeDeploy. What is the minimum number of target groups required for this deployment?

A developer is using AWS CodeDeploy to deploy an application to an Amazon ECS service with the Fargate launch type. The deployment uses a blue/green strategy. After the new task set is created and passes the initial health checks, the traffic is shifted to the new task set. However, the new task set is immediately replaced by the old one after a few minutes, causing a rollback. What is the most likely reason?

A developer is deploying a microservice using AWS CodeDeploy with an Amazon ECS compute platform. The service must be updated with a blue/green deployment strategy. The developer wants to ensure that if the deployment fails, the new task set is automatically terminated and the original task set continues to serve traffic. Which configuration should the developer set?

A company deploys a serverless application using AWS SAM. The application includes an Amazon API Gateway HTTP API and several AWS Lambda functions. The developer wants to implement a canary deployment for the API Gateway stage: 5% of traffic should be immediately shifted to the new version, and after 15 minutes, the remaining 95% should be shifted. Which SAM resource attribute should the developer configure?

A developer is using AWS SAM to define a serverless application. The application includes an AWS Lambda function and an Amazon API Gateway REST API. The developer wants to configure the API Gateway stage to enable logging and set the stage name based on the SAM parameter Stage. In the SAM template, which property of the AWS::Serverless::Api resource should the developer use to set the stage name?

A developer is using AWS CodeDeploy to deploy an application to an Auto Scaling group. The deployment must be as fast as possible while ensuring that at least 50% of instances remain healthy throughout. Which deployment configuration should be used?

A developer uses AWS CodePipeline to deploy a serverless application defined with AWS SAM. The pipeline consists of Source (S3), Build (CodeBuild), and Deploy (CloudFormation) stages. The developer wants to run integration tests after the stack is deployed but before the pipeline completes. Which approach should the developer use?

A developer is using AWS CodeDeploy to deploy an application to an EC2 Auto Scaling group. The developer wants the deployment to automatically roll back if any of the new instances fail a health check within the first 10 minutes after deployment. Which configuration should the developer set in the CodeDeploy deployment group?

A developer is using AWS Elastic Beanstalk to deploy a web application. The application uses an in-environment Amazon RDS database instance. The developer needs to update the application code without risking data loss. The database must not be affected by environment operations such as termination or updates. What is the recommended approach?

A developer is using AWS CodePipeline with a two-stage pipeline: Source (CodeCommit) and Deploy (Elastic Beanstalk). The developer wants to add a test stage that runs unit tests using AWS CodeBuild. The test stage should run only when a specific branch (development) is pushed. Which approach should the developer use?

A company uses AWS Elastic Beanstalk to deploy a web application. The application requires a database connection string that is different for each environment (development, staging, production). The developer wants to set these values without hardcoding them in the application code. Which configuration method should the developer use?

A company uses AWS CodePipeline with a manual approval step before deployment. The developer wants to ensure that if a pipeline execution is waiting for approval and new code is pushed, the awaiting execution is canceled and a new one starts with the latest code. Which pipeline execution mode should be configured?

A developer is deploying a serverless application using AWS SAM. The application consists of multiple Lambda functions and an Amazon API Gateway. The developer wants to enable canary deployments for the API Gateway stage to gradually shift traffic. Which SAM resource attribute should the developer use?

A developer is using AWS CodeDeploy to deploy an application to an EC2 Auto Scaling group. The deployment must be rolled back automatically if any instance in the deployment fails a health check within 10 minutes after the deployment. Which configuration should the developer set in the CodeDeploy deployment group?

A company uses AWS CodeDeploy to deploy a web application to an Auto Scaling group of EC2 instances. The deployment must automatically roll back if the new application version causes health check failures for more than 20% of the instances within the first 5 minutes after deployment. Which configuration should the developer set in the deployment group?

A developer is using AWS CodeDeploy to deploy an application to a fleet of EC2 instances in an Auto Scaling group. The application must remain available during the deployment. The developer wants to update one instance at a time, ensuring that only one instance is taken offline at any moment. Which deployment configuration should the developer choose?

A developer is using AWS CodeDeploy with a blue/green deployment strategy for an EC2 Auto Scaling group. The deployment must automatically roll back if any of the new instances fail a health check within the first 10 minutes after deployment. Which configuration should the developer set?

A developer is using AWS CodeDeploy to deploy an application to an EC2 Auto Scaling group. The deployment must ensure that a minimum number of instances are always running and healthy. The developer wants to deploy to 10 instances. Which deployment configuration should the developer use?

A developer is deploying a serverless application using AWS SAM. The application includes an AWS Lambda function that is triggered by an S3 bucket event when an object is created. The developer wants to ensure that the Lambda function has the correct permissions to be invoked by S3. Which resource should the developer define in the SAM template?

A company uses AWS Elastic Beanstalk to run a web application. They want to deploy a new version with zero downtime. They have a production environment running the current version and a staging environment running the new version. After thoroughly testing the staging environment, they want to swap the URLs so that production now points to the new version. Which deployment strategy should they use?

A developer is using AWS Elastic Beanstalk to deploy a web application. The application uses an Amazon RDS database instance that is included in the Elastic Beanstalk environment. The developer wants to update the application code without affecting the database. What is the recommended approach?

A company uses AWS Elastic Beanstalk to deploy a web application. The development team wants to test a new feature by routing a small percentage of traffic to a separate environment before fully rolling out. Which Elastic Beanstalk deployment strategy should the developer use?

A developer is using AWS Elastic Beanstalk to deploy a Node.js application. The application requires an environment variable that contains a secret (e.g., a database password). The developer wants to store the secret securely and make it available to the application instances. Which Elastic Beanstalk feature should be used?

A developer is setting up a CI/CD pipeline using AWS CodePipeline to deploy an application to Amazon ECS. The pipeline has a source stage that pulls code from an AWS CodeCommit repository. The developer wants the pipeline to execute only when commits are pushed to the 'main' branch. How should the developer configure this?

A developer is using AWS CodePipeline to deploy a web application. The pipeline has a source stage that pulls from CodeCommit and a deploy stage that uses AWS Elastic Beanstalk. The developer wants to run unit tests automatically before deploying to Elastic Beanstalk. Which action should the developer add to the pipeline?

A developer is using AWS Elastic Beanstalk to deploy a web application. The developer wants to run database migration scripts as part of the deployment process before the new application version starts serving traffic. Which Elastic Beanstalk configuration file should the developer use to define the migration commands?

A company runs a web application on AWS Elastic Beanstalk. The application currently runs in a single environment. The developer wants to deploy a new version with zero downtime and be able to test the new version thoroughly before it receives any production traffic. Which deployment strategy should the developer use?

A developer is deploying a new version of a web application on AWS Elastic Beanstalk. The application currently runs in a single environment with an Auto Scaling group. The developer wants to ensure zero downtime during the deployment and that the new version can be fully tested before receiving any traffic. Which Elastic Beanstalk deployment policy should the developer use?

A developer is using AWS CodePipeline to deploy a web application. The pipeline has stages: Source, Build, Staging Deploy, Staging Test, and Prod Deploy. The developer wants to ensure that if the Staging Test stage fails, the pipeline automatically stops and does not proceed to Prod Deploy. Which action should the developer take?

A developer is using AWS CloudFormation to deploy a stack that includes an Amazon S3 bucket and an AWS Lambda function. The Lambda function needs to be granted permission to read objects from the S3 bucket. Which resource should the developer define in the CloudFormation template to provide these permissions?

A developer has set up an AWS CodePipeline pipeline that automatically deploys a web application through a series of stages: Source, Build, Staging, and Production. The developer wants to require a manual approval before the pipeline proceeds to the Production stage. How should the developer implement this?

A developer uses AWS CodePipeline with a manual approval step before deployment. The developer wants to ensure that if a new commit is pushed while a pipeline execution is waiting for approval, the waiting execution is canceled and a new one starts with the latest commit. Which pipeline execution mode should be configured?

A developer wants to deploy a serverless application using AWS CloudFormation. The application consists of an API Gateway, Lambda functions, and DynamoDB tables. The developer wants to ensure that the stack can be updated without resource interruption when possible. Which CloudFormation feature should the developer use?

A developer is using AWS Elastic Beanstalk to deploy a web application. The application requires custom configuration, such as setting environment variables for the EC2 instances. Which file should the developer include in the application source bundle under the appropriate directory to achieve this?

A developer is using AWS CodeDeploy to deploy an application to an Auto Scaling group of EC2 instances. The developer wants to minimize the number of instances that are taken out of service at any given time during the deployment. Which predefined deployment configuration should the developer use?

A developer is using AWS CodeDeploy to deploy an application to an EC2 Auto Scaling group. The developer wants to monitor the deployment and automatically roll back if a specified Amazon CloudWatch alarm is triggered during the deployment. Which CodeDeploy feature should the developer configure?

A developer is deploying a containerized application to Amazon ECS with the Fargate launch type using AWS CodeDeploy for blue/green deployments. The application is behind an Application Load Balancer (ALB). What is the minimum number of ALB target groups required for a blue/green deployment?

A developer is using AWS Elastic Beanstalk to deploy a web application. The application requires a relational database. The developer wants to ensure that the database is not accidentally deleted when the Elastic Beanstalk environment is terminated. Which approach should the developer take?

A developer is using AWS CloudFormation to deploy a stack with multiple resources. To ensure that a specific EC2 instance is created only after a security group is created, the developer wants to define the dependency. How should the developer achieve this in the CloudFormation template?

A developer is deploying an application using AWS Elastic Beanstalk. The application requires a custom Amazon Machine Image (AMI) that includes specific software packages not available in the standard Elastic Beanstalk platform. Which approach should the developer use to ensure the custom AMI is used for all EC2 instances in the environment?

A developer is deploying an application using AWS Elastic Beanstalk with a Docker platform. The developer wants to minimize downtime during deployments and ensure that the new version is fully tested before routing traffic to it. Which deployment policy should the developer choose?

A developer is deploying a web application using AWS Elastic Beanstalk. The application runs on multiple Amazon EC2 instances behind an Application Load Balancer. The developer wants to deploy a new version with zero downtime and the ability to quickly roll back if issues are discovered. Which deployment policy should the developer choose?

A developer wants to deploy a new version of an application to an EC2 Auto Scaling group using AWS CodeDeploy. The developer wants to minimize downtime and ensure that if the deployment fails, it automatically rolls back to the previous version. Which deployment type should the developer choose?

A developer is deploying a web application on AWS Elastic Beanstalk. The environment must maintain the same number of running instances throughout the deployment to ensure capacity. The developer also wants to minimize downtime. Which deployment policy should be used?

A developer is deploying a serverless application using AWS SAM. The application includes an API Gateway REST API and a Lambda function. The developer wants to set up a custom domain name for the API in the production stage. Which resource should the developer define in the SAM template to achieve this with minimal effort?

A developer is using AWS CodeBuild to build a Java application. The buildspec.yml file currently runs unit tests. The developer wants to generate a code coverage report and publish it to the CodeBuild console for analysis. Which CodeBuild feature should be used?

A developer is using AWS CodeDeploy to deploy an application to an Amazon ECS service using the Fargate launch type. The developer wants to ensure that the deployment rolls back automatically if the new task set fails health checks. Which configuration should the developer set?

A developer is using AWS CodeDeploy to perform a canary deployment for an AWS Lambda function. The deployment should first shift 10% of traffic to the new version, and then shift the remaining 90% after 5 minutes. Which deployment configuration should be used?

A developer is using AWS CodeDeploy to deploy a new version of an AWS Lambda function. The developer wants to gradually shift traffic from the old version to the new version in 10-minute increments. Which deployment configuration should the developer use?

A developer is using AWS CodeDeploy to deploy an application to an EC2 Auto Scaling group. The deployment must follow a rolling update, deploying to exactly 50% of the instances at a time. Which built-in deployment configuration should the developer use?

A CodeDeploy deployment to Lambda should shift 10 percent of traffic for 10 minutes before full rollout and automatically roll back on alarms. Which configuration should be used?

A CloudFormation update may replace an RDS database. The developer wants to preview replacement risk before executing. What should be created?

An ECS blue/green deployment with CodeDeploy and an Application Load Balancer fails because the replacement task set never receives test traffic. Which configuration should be checked?

A developer needs to package and deploy a serverless application with Lambda functions, API Gateway, and DynamoDB using concise syntax. Which framework is AWS-native for this purpose?

A team wants CloudFormation to prevent accidental deletion of a production DynamoDB table during stack updates. What should they configure?

A CodePipeline source stage should start when code is pushed to a repository, without scheduled polling. Which integration pattern should be used?

An Elastic Beanstalk deployment must avoid downtime and create a full new set of instances before swapping traffic, accepting higher temporary cost. Which policy fits?

A developer needs different configuration values for dev, test, and prod in the same SAM template. Which feature is suitable?

A CloudFormation stack update fails and rolls back. Which two practices help diagnose and reduce future deployment risk?

A SAM application should gradually shift Lambda traffic and roll back on errors. Which two pieces are needed?

A CodeDeploy blue/green ECS deployment uses an ALB. Which two resources are required?

A developer wants separate dev and prod CloudFormation deployments from the same template. Which two practices help?

Drag and drop the steps to set up a CI/CD pipeline using AWS CodePipeline in the correct order.

Drag and drop the steps to set up a custom domain for an API Gateway API in the correct order.

Match each HTTP status code to its meaning.

Match each AWS service to its port number (if applicable).

A company uses 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'. The deployment configuration is set to CodeDeployDefault.OneAtATime. What is the most likely cause of this failure?

A developer is using AWS Elastic Beanstalk to deploy a Node.js application. The developer wants to run a custom script to set environment variables before the application starts. Which configuration file and location should the developer use?

A developer is deploying a serverless application using AWS SAM. The developer wants to define a Lambda function that is invoked by an Amazon API Gateway REST API. Which SAM resource type should the developer use to define the API?

A company uses AWS CodePipeline to automate deployments. The pipeline has a source stage that pulls from Amazon S3, a build stage using AWS CodeBuild, and a deploy stage using AWS CloudFormation. The deploy stage often fails because CloudFormation change sets are not being created. What is the most likely cause?

A company is using AWS CodeDeploy with an in-place deployment to an Auto Scaling group. The deployment fails with the error 'Deployment failed because the deployment group does not have enough instances to deploy to'. The Auto Scaling group has a minimum size of 2, maximum size of 5, and desired capacity of 2. The deployment configuration is CodeDeployDefault.AllAtOnce. What is the most likely cause?

A developer is deploying a Docker container to Amazon ECS using the Fargate launch type. The developer wants to ensure the container has access to an Amazon RDS database. What is the best way to securely pass the database credentials to the container?

A developer is using AWS CodeBuild to build a Java application. The build fails with the error 'BUILD_CONTAINER_UNABLE_TO_PULL_IMAGE'. What is the most likely cause?

A company is using AWS CloudFormation to manage infrastructure. The developer wants to update a stack but needs to prevent specific resources from being replaced. What CloudFormation feature should the developer use?

A developer is deploying a static website to Amazon S3 and wants to use Amazon CloudFront for content delivery. The developer wants to ensure that only CloudFront can access the S3 bucket. Which S3 bucket policy should the developer use?

A developer is using AWS CodeDeploy to deploy a revision to an Amazon EC2 instance. 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.' Which TWO actions should the developer take to troubleshoot the issue? (Choose TWO.)

A company is deploying a microservices architecture using AWS Lambda and Amazon API Gateway. The developer wants to implement a canary release deployment for the API. Which THREE steps should the developer take? (Choose THREE.)

A developer is using AWS Elastic Beanstalk to deploy a Python web application. The developer wants to run database migrations before the application starts. Which TWO methods can the developer use to achieve this? (Choose TWO.)

A company is deploying a new microservice on AWS Lambda that processes high-resolution images and stores results in Amazon S3. The Lambda function currently uses 1024 MB of memory and has a timeout of 2 minutes. During peak load, many invocations are timing out. The function is CPU-bound during image processing. Which change is MOST likely to reduce timeouts without increasing costs unnecessarily?

An e-commerce platform uses AWS CodePipeline to deploy a web application to an Auto Scaling group behind an Application Load Balancer. The deployment strategy must minimize downtime and allow immediate rollback if the new version fails health checks. Which deployment configuration meets these requirements?

A development team uses AWS CodeDeploy to deploy a serverless application. The deployment fails with the error: 'The deployment failed because the deployment group did not contain any instances.' The deployment group is configured with an Amazon ECS service and uses the Blue/Green deployment type. What is the MOST likely cause?

A company uses AWS Elastic Beanstalk to deploy a PHP application. The application requires write access to the /tmp directory on the EC2 instances. The deployment uses a custom platform. After a recent deployment, the application fails to write to /tmp. The operations team verifies that the instance security group and NACLs allow all outbound traffic. What is the MOST likely cause?

A company uses AWS CloudFormation to manage infrastructure. The development team wants to deploy a new version of a Lambda function without downtime. The function is part of a stack. Which action should the team take?

A DevOps engineer is troubleshooting a failed AWS CodeBuild build. The build project uses a custom Docker image stored in Amazon ECR. The build logs show: 'Error: Cannot pull Docker image: repository does not exist or may require 'docker login'.' The engineer has verified that the ECR repository exists and the IAM role used by CodeBuild has the 'ecr:GetDownloadUrlForLayer', 'ecr:BatchGetImage', and 'ecr:GetAuthorizationToken' permissions. What is the MOST likely cause?

A company is using AWS CodePipeline with a multi-branch strategy. The pipeline includes a source stage from AWS CodeCommit, a build stage using AWS CodeBuild, and a deploy stage using AWS CodeDeploy. The team wants to automatically deploy changes only when a pull request is merged to the 'main' branch. Which configuration should be used?

An application deployed on AWS Lambda needs access to an Amazon RDS database. The Lambda function is in a VPC with a public subnet. The RDS instance is in a private subnet. The function can connect to the database but experiences frequent timeouts. What is the MOST likely cause?

A company uses AWS OpsWorks for configuration management. They want to migrate to AWS Systems Manager for patching and automation. They have a fleet of EC2 instances running Amazon Linux 2. Which Systems Manager capability should they use to automate patching?

A company is deploying a Node.js application on AWS Elastic Beanstalk. The application uses environment variables for configuration. The development team wants to ensure that the environment variables are not exposed in the source code or in the deployment logs. Which TWO actions should the team take? (Choose TWO.)

A company is using AWS CloudFormation to deploy a stack with a Lambda function and an API Gateway REST API. The deployment must be updated without downtime. The current stack has a Lambda function with an alias 'prod'. Which THREE steps should the developer take to achieve a zero-downtime deployment? (Choose THREE.)

A company uses AWS CodeBuild to compile and test a Java application. The build process takes a long time because dependencies are downloaded every time. Which TWO actions can reduce build time? (Choose TWO.)

A developer is deploying a new version of a Lambda function using the AWS CLI. Which command should the developer use to update the function code?

A company uses AWS CodeDeploy to deploy a web application to an Auto Scaling group. The deployment fails with a 'ScriptMissing' error. What is the most likely cause?

A development team uses AWS Elastic Beanstalk for a Node.js application. They want to deploy a new version with zero downtime. Which deployment policy should they choose?

A company uses AWS CodePipeline to automate releases. The pipeline includes a source stage from CodeCommit, a build stage with CodeBuild, and a deploy stage with CodeDeploy. The build stage fails intermittently due to insufficient memory. What should the developer do to resolve this?

A developer is deploying a serverless application using AWS SAM. The developer runs 'sam deploy' but receives an error that the S3 bucket does not exist. How should the developer fix this?

A company uses AWS OpsWorks for configuration management. They want to deploy a new application version to a stack. Which lifecycle event should they use to run deployment scripts?

A developer is using AWS CloudFormation to create a stack that includes an EC2 instance. The stack creation fails because the instance type is not supported in the selected Availability Zone. What should the developer do?

A developer uses AWS CodeBuild to run unit tests. The build succeeds but the tests fail. The developer wants to fail the build if tests fail. What should the developer do?

A company wants to deploy a microservices application on Amazon ECS. They need to update services with zero downtime and automatic rollback on failure. Which deployment controller should they use?

Which TWO deployment methods can be used to update an AWS Lambda function with no downtime? (Select TWO.)

A developer is deploying a web application using AWS Elastic Beanstalk. Which TWO configuration files can be used to customize the software that runs on the EC2 instances? (Select TWO.)

Which THREE steps are required to set up a continuous delivery pipeline using AWS CodePipeline, CodeBuild, and CodeDeploy? (Select THREE.)

A developer is deploying a new version of a Lambda function using AWS CodeDeploy with a linear canary deployment. The function is part of a serverless application. After the deployment starts, the developer notices that the new version is receiving only 10% of traffic initially, but after 10 minutes, the traffic increases to 100%. What should the developer do to ensure a more gradual traffic shift?

A company uses AWS CodePipeline to deploy a critical web application. The pipeline has a source stage (CodeCommit), a build stage (CodeBuild), and a deploy stage (CodeDeploy). During a recent deployment, the CodeDeploy stage failed because the target EC2 instances were not in a healthy state. The developer needs to ensure that the pipeline automatically rolls back the deployment to the last successful version if the deployment fails. What should the developer do?

A developer is deploying a new version of an application to Amazon ECS using AWS CodeDeploy. The application uses a blue/green deployment strategy. After the deployment, traffic is automatically shifted to the new task set. However, the developer wants to test the new version with a small percentage of users before shifting all traffic. What should the developer do?

A company uses AWS Elastic Beanstalk to deploy a web application. The environment is currently running a previous version. The developer uploads a new application version and deploys it to the environment. After the deployment, the environment health status turns 'Severe' and the new version is not accessible. The developer needs to quickly revert to the previous working version. What should the developer do?

A developer is using AWS CloudFormation to deploy a stack that includes an Amazon RDS DB instance. The developer wants to update the DB instance to a larger instance type without causing downtime. The current template has DeletionPolicy set to 'Delete'. What should the developer do?

A developer is deploying a serverless application using the AWS Serverless Application Model (SAM). The application consists of an API Gateway, a Lambda function, and a DynamoDB table. The developer wants to enable canary deployments for the Lambda function. What should the developer do?

A company uses AWS CodeBuild to run tests and build artifacts for a Java application. The build process is taking longer than expected. The developer wants to speed up the build by caching dependencies. What should the developer do?

A developer is deploying a microservices application on Amazon ECS using Fargate. The application uses an Application Load Balancer (ALB) to distribute traffic. The developer needs to perform a blue/green deployment with automatic rollback if health checks fail. What should the developer use?

A developer is deploying a Python application to AWS Lambda. The application has several dependencies. The developer wants to ensure that the deployment package is as small as possible to reduce cold start times. What should the developer do?

A developer is using AWS CodePipeline to deploy a web application. The pipeline has a source stage from Amazon S3, a build stage using AWS CodeBuild, and a deploy stage using AWS CodeDeploy. The developer notices that the deploy stage fails intermittently due to EC2 instances not being available. Which TWO actions should the developer take to improve the reliability of the deployment? (Choose two.)

A company is deploying a containerized application on Amazon ECS using AWS Fargate. The application needs to handle variable traffic. The developer wants to set up automatic scaling based on CPU utilization. Which THREE steps are required to achieve this? (Choose three.)

A developer is using AWS Elastic Beanstalk to deploy a web application. The environment uses an Application Load Balancer (ALB). The developer wants to perform a blue/green deployment to minimize downtime. Which TWO steps should the developer take? (Choose two.)

A company is deploying a new microservice using AWS CodeDeploy. The deployment group uses an EC2/On-Premises compute platform with an in-place deployment configuration. After the deployment, the new application version is not receiving traffic. The previous version continues to serve requests. What is the most likely cause?

A development team uses AWS Elastic Beanstalk to deploy a web application. They want to perform a blue/green deployment to minimize downtime. What should they do to implement this?

A company uses AWS CloudFormation to deploy infrastructure. They have a stack that creates an Amazon RDS DB instance. They want to update the DB instance class without downtime. Which update policy should they use?

A team uses AWS CodePipeline to automate deployments. They notice that a deployment to Amazon ECS fails because the task definition is not updated. The pipeline includes a source stage from CodeCommit, a build stage using AWS CodeBuild, and a deploy stage to Amazon ECS. What is the most likely missing step?

An organization uses AWS Lambda functions behind an Amazon API Gateway REST API. They want to deploy a new version of the Lambda function using canary deployments. What is the recommended approach?

A company uses AWS OpsWorks for configuration management. They have a stack with multiple layers. They want to deploy a new application version to the application layer using rolling updates. What is the correct way to achieve this?

A developer is using AWS CloudFormation to create a stack. They want to update the stack but need to ensure that if the update fails, the stack is automatically rolled back to the previous state. Which stack option should they configure?

A company uses AWS CodeBuild for building and testing their application. They have a build project that runs on a Linux environment. They want to run a build in a custom Docker image that is stored in Amazon ECR. How should they configure the build project?

A team uses AWS Elastic Beanstalk with a Docker platform. They want to deploy a multi-container Docker application. What file is required to define the container configuration?

Which TWO statements are true about AWS CodeDeploy deployment groups? (Choose two.)

Which THREE actions are required to set up a blue/green deployment for an Amazon ECS service using AWS CodeDeploy? (Choose three.)

Which TWO AWS services can be used to automatically deploy code to Amazon EC2 instances? (Choose two.)

An IAM policy is attached to an EC2 instance role. The instance is part of a CodeDeploy deployment group. The deployment fails because the CodeDeploy agent cannot download the revision. What is the most likely reason?

A developer runs the AWS CLI command shown in the exhibit. The deployment is created successfully, but the CodeDeploy agent on the target instances does not download the revision. What is the most likely cause?

A CloudFormation template defines a Lambda function and a version resource. After updating the function code in the S3 bucket, the developer updates the stack. The Lambda function is updated, but the version resource remains unchanged. What is the most likely reason?

A company is deploying a new microservice using AWS Lambda. The deployment pipeline uses AWS CodeBuild and AWS CodePipeline. The team wants to automatically roll back to the previous function version if the new version fails CloudWatch alarms. Which deployment strategy should they implement?

A developer is using AWS CodeDeploy to deploy an application to an Auto Scaling group. The deployment fails during the 'BeforeInstall' lifecycle event. Which file should the developer check to debug the failure?

A company uses AWS Elastic Beanstalk to deploy a web application. The development team wants to ensure that the deployment does not cause any downtime and that new instances are fully registered with the load balancer before old instances are terminated. Which deployment policy should they use?

A developer is using AWS CodeCommit as a source repository. They want to automatically build and test code whenever a new branch is created. Which AWS service should they use to trigger the pipeline?

A company uses AWS CodePipeline to deploy a static website to Amazon S3. The pipeline includes a deploy action that uses AWS CloudFormation to create the S3 bucket and upload files. The developer notices that the deploy action fails intermittently with a 'BucketAlreadyExists' error. What is the most likely cause?

A developer is deploying a serverless application using the AWS Serverless Application Model (SAM). The application includes an API Gateway endpoint backed by a Lambda function. The developer wants to enable canary deployments to shift traffic gradually. Which SAM resource attribute should they configure?

A company is using AWS CodeBuild to compile a Java application. The build takes a long time because Maven dependencies are downloaded each time. How can the developer reduce build time?

A team uses AWS CloudFormation to manage infrastructure. They want to update a stack that contains an Amazon RDS database. During the update, they need to modify the DB instance class. Which update policy should they use to minimize downtime?

A developer is using AWS CodePipeline with multiple actions in a stage. The pipeline has a build action that produces artifacts, followed by a deploy action. The developer wants to ensure that if the deploy action fails, the pipeline stops and does not continue to the next stage. How can they achieve this?

Which TWO are valid deployment strategies supported by AWS CodeDeploy? (Choose TWO.)

Which THREE are best practices for deploying applications with AWS Elastic Beanstalk? (Choose THREE.)

Which TWO are valid ways to automate deployments to Amazon ECS? (Choose TWO.)

Refer to the exhibit. A developer ran the AWS CLI command and received the output shown. What is the most likely cause of the UPDATE_FAILED status?

Refer to the exhibit. A developer is creating an IAM policy for a CI/CD service to deploy to CodeDeploy. The policy allows creating deployments and registering application revisions. However, deployments fail with an access denied error. What is the missing permission?

Refer to the exhibit. A developer created this CloudFormation template to host a static website. After deployment, the website returns 403 Forbidden errors. What is the most likely cause?

A company has a production environment using AWS Elastic Beanstalk with a multi-container Docker platform. The application consists of a PHP web server and a Redis cache, each running in separate containers. The deployment uses a rolling update policy with a batch size of 1. Recently, during deployments, some users experience intermittent 502 Bad Gateway errors for about 30 seconds. The errors occur when the old containers are terminated and new containers are not yet ready to serve traffic. The development team wants to eliminate this downtime without increasing the deployment time significantly. The team has access to modify the Elastic Beanstalk environment configuration and the Dockerrun.aws.json file. Which action should the team take to resolve the issue?

A developer is deploying a new version of a Lambda function using an AWS CodePipeline pipeline. The deployment fails during the 'Deploy' stage with an error indicating that the function's code is too large. What should the developer do to resolve this issue?

A team uses AWS Elastic Beanstalk to deploy a web application. The application experiences intermittent high latency. The team notices that the environment's Auto Scaling group is not scaling out quickly enough. Which configuration change should the team make to improve scaling responsiveness?

A company deploys a containerized application on Amazon ECS with Fargate launch type. The application needs to read sensitive configuration data at startup. The company requires that the data be encrypted at rest and in transit, and that the application use least-privilege permissions. Which solution meets these requirements?

A developer is using AWS CodeDeploy to deploy an application to an EC2 instance. The deployment fails with the error 'ScriptMissing' during the BeforeInstall lifecycle event. What is the most likely cause?

A company uses AWS CloudFormation to manage infrastructure. A developer wants to update a stack but needs to ensure that certain resources are not accidentally deleted. The developer wants to protect specific resources from stack updates that would delete them. Which CloudFormation feature should the developer use?

A developer is deploying a serverless application using AWS SAM. The application consists of multiple Lambda functions and an API Gateway REST API. The developer needs to ensure that the API Gateway endpoint is created before the Lambda functions are deployed, because the functions need the endpoint URL as an environment variable. How should the developer configure the SAM template?

A developer is using AWS CodeBuild to compile and package a Java application. The build process takes longer than expected. The developer wants to speed up the build by reusing dependencies that have not changed between builds. Which feature should the developer enable?

A company uses AWS OpsWorks to manage a stack of EC2 instances. The operations team needs to deploy a new configuration file to all instances in a layer. Which approach should the team use to automate this deployment?

A developer is deploying a microservices architecture on Amazon ECS. The services need to communicate with each other securely. The developer wants to use service discovery and ensure that traffic between services is encrypted. Which combination of services should the developer use?

A developer is using AWS CodePipeline to automate deployments. The pipeline has a source stage that pulls code from an Amazon S3 bucket. Which TWO actions can the developer take to automatically start the pipeline when new code is uploaded to the S3 bucket? (Choose TWO.)

A company is deploying a web application on AWS Elastic Beanstalk. The application requires a relational database. The company wants to decouple the database lifecycle from the environment lifecycle. Which TWO steps should the company take to achieve this? (Choose TWO.)

A developer is deploying a serverless application using AWS SAM. The application includes an Amazon DynamoDB table and a Lambda function that reads from the table. The developer wants to ensure that the Lambda function has the minimum required permissions to read from the table. Which THREE statements about SAM policy templates are correct? (Choose THREE.)

A company is deploying a new microservice on AWS Lambda behind an API Gateway. The development team wants to ensure that new versions of the Lambda function can be rolled out gradually and automatically rolled back if error rates exceed a threshold. Which deployment strategy should the team use?

A team is using AWS CodePipeline to deploy a critical application to Amazon ECS. The pipeline has a deployment stage that uses Amazon ECS (Blue/Green) action with CodeDeploy. Recently, the deployment failed because the new task set did not become healthy within the specified timeout. The team wants to ensure that future deployments automatically roll back if the health check fails. What should the team do?

A developer is using AWS Elastic Beanstalk to deploy a web application. The developer needs to update the environment's configuration to use a larger instance type. What is the most efficient way to apply this change with minimal downtime?

A company uses AWS CloudFormation to deploy infrastructure. The development team wants to update a stack that includes an Amazon RDS database. The update requires changing the DB instance class, which will cause a brief downtime. The team wants to minimize downtime by creating a new database instance before deleting the old one. Which CloudFormation stack update policy should be used?

A developer is deploying a serverless application using the AWS Serverless Application Model (SAM). The application consists of several Lambda functions and an API Gateway. The developer wants to enable gradual deployment of Lambda function versions with automatic rollback based on CloudWatch alarms. What should the developer add to the SAM template?

A company is using AWS CodeBuild to compile and test code before deploying to Amazon S3. The build process must be triggered automatically whenever a developer pushes code to the 'main' branch of an AWS CodeCommit repository. Which resource should be used to trigger the build?

A team is deploying a containerized application on Amazon ECS using Fargate. The application requires high availability and must be deployed across multiple Availability Zones. The team wants to automate the deployment process using AWS CodePipeline. What is the most efficient way to update the ECS service with a new task definition?

A company uses AWS OpsWorks for configuration management and deployment of applications on EC2 instances. The company wants to migrate to AWS Systems Manager for automation and patching. Which Systems Manager capability should be used to execute scripts and commands on EC2 instances as part of a deployment?

A developer is deploying a web application on Amazon EC2 instances behind an Application Load Balancer (ALB). The developer uses AWS CodeDeploy to deploy new application versions. The deployment group is configured with an in-place deployment. The developer wants to ensure that the deployment does not cause any downtime. Which additional configuration is required?

A company is deploying a critical application using AWS Elastic Beanstalk. The application experiences occasional spikes in traffic. The company wants to ensure that the environment scales automatically and that deployments are rolled back if health checks fail. Which TWO configurations should be used together to meet these requirements? (Choose TWO.)

A company uses AWS CloudFormation to manage infrastructure. The development team wants to implement a CI/CD pipeline that automatically updates a CloudFormation stack when code is pushed to a CodeCommit repository. The pipeline should also run tests before deploying. Which THREE services should be used together to achieve this? (Choose THREE.)

A developer is using AWS CodeDeploy to deploy an application to EC2 instances. The developer wants to ensure that the deployment stops if any instance fails to install the application. Which TWO CodeDeploy settings should be configured to achieve this? (Choose TWO.)

Refer to the exhibit. A developer created this IAM policy to allow a CI/CD service to trigger CodePipeline and CodeBuild. However, the pipeline fails with an 'AccessDenied' error when trying to start the CodeBuild project. What is the likely cause?

Refer to the exhibit. A developer attempted to update a CloudFormation stack that includes an EC2 instance. The update failed and the stack is rolling back. The event shows that the EC2 instance update failed with reason 'Resource update cancelled: stack update cancelled'. What is the most likely cause of this failure?

Refer to the exhibit. A CloudFormation template creates an S3 bucket with a 'Retain' deletion policy and an EC2 instance. If the stack is deleted, what happens to the S3 bucket?

A developer is deploying a Node.js application to AWS Elastic Beanstalk. The application uses environment variables for database credentials. What is the BEST way to securely provide these credentials to the application?

A company uses AWS CodeDeploy to deploy an 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 for deployment, or some instances in your deployment group are experiencing problems.' Which of the following is the MOST likely cause?

A development team uses AWS CodePipeline to automate deployments. The pipeline includes a build stage using AWS CodeBuild and a deploy stage using AWS CodeDeploy. After a recent change, the deploy stage fails intermittently with a timeout error. The CodeBuild stage succeeds. What should the team do to troubleshoot the issue?

A company uses AWS CloudFormation to manage infrastructure. A developer wants to update a stack that includes an Amazon RDS database. The update requires replacing the database with a new instance. Which stack update policy should the developer use to minimize downtime?

Refer to the exhibit. A developer has attached the above IAM policy to an IAM role used by an AWS Lambda function. The Lambda function reads and writes objects to an S3 bucket. However, the function fails when trying to write objects. What is the MOST likely cause?

A developer is deploying a web application on AWS Elastic Beanstalk. The application needs to run on multiple instances behind a load balancer. Which deployment policy will cause the LEAST downtime?

A company uses AWS CodePipeline with a source stage from Amazon S3. The pipeline triggers on changes to the S3 bucket. However, the pipeline does not trigger when a new object is uploaded. What is the MOST likely cause?

A developer is creating a CloudFormation template to deploy a microservices architecture. The template includes an Amazon ECS service with an Application Load Balancer. The developer wants to ensure that the load balancer is created before the ECS service. How should the developer achieve this?

A company uses AWS CodeDeploy to deploy a web application to an Auto Scaling group. The deployment fails during the BeforeInstall lifecycle event. What should the developer do to troubleshoot the issue?

Which TWO are benefits of using AWS CloudFormation for infrastructure deployment? (Choose two.)

A company is deploying a new microservice using AWS Lambda and Amazon API Gateway. Which THREE steps should be included in the deployment pipeline? (Choose three.)

Which THREE are valid deployment strategies in AWS CodeDeploy? (Choose three.)

A company uses AWS CodePipeline to deploy a containerized application to Amazon ECS with Fargate. The pipeline consists of a source stage (Amazon ECR), a build stage (CodeBuild), and a deploy stage (CodeDeploy with ECS Blue/Green). Recently, after a successful build, the deploy stage fails with the error 'Service deployment failed because the task definition is not compatible with the target group.' The task definition uses the 'awsvpc' network mode and specifies a port mapping of 80. The target group is configured to use port 80. What is the MOST likely cause of the failure?

A developer is using AWS CodeBuild to build a Java application. The build succeeds locally but fails in CodeBuild with the error 'BUILD FAILED: Unable to find a Java installation.' The buildspec.yml file includes a 'runtime-versions' section specifying Java 11. The CodeBuild project uses the 'aws/codebuild/amazonlinux2-x86_64-standard:4.0' image. What is the MOST likely cause of the failure?

A company uses AWS Elastic Beanstalk to deploy a Python web application. After a recent deployment, the environment health turns 'Severe' and the application becomes unresponsive. The developer checks the logs and finds multiple '502 Bad Gateway' errors from the nginx proxy. The application was working before the deployment. What is the MOST likely cause?

A developer deploys a new version of an AWS Lambda function using the AWS CLI. After the deployment, the function starts returning errors. The developer needs to quickly revert to the previous version without redeploying. What should the developer do?

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 developer needs to identify the root cause. Which AWS service should the developer use to view detailed error logs from the failed deployment?

A developer is using AWS CloudFormation to deploy a stack that includes an Amazon RDS DB instance. The developer wants to update the stack to change the DB instance class. The update fails because CloudFormation cannot modify the DB instance class without replacement. The developer needs to complete the update with minimal downtime. What should the developer do?

A developer is deploying a serverless application using the AWS Serverless Application Model (SAM). The developer wants to ensure that the Lambda function's environment variables are encrypted at rest. What is the most straightforward way to achieve this?

A company uses AWS Elastic Beanstalk to deploy a web application. The developer has updated the application code and wants to deploy the new version with a rolling deployment strategy to minimize downtime. Which configuration should the developer use?

A developer is deploying a microservices application on Amazon ECS using Fargate. The developer wants to implement a blue/green deployment strategy using AWS CodeDeploy. The current production environment uses an Application Load Balancer (ALB). What is the minimum configuration required to enable blue/green deployments?

A developer uses AWS CodeCommit to store source code. The developer wants to automatically trigger a build in AWS CodeBuild every time a new commit is pushed to the master branch. Which AWS service should the developer use to configure this integration?

A team is using AWS CodeBuild to compile and test code. The build takes longer than expected. The team wants to reduce build times by caching dependencies. Which option should the team use to cache dependencies in CodeBuild?

A company has a legacy application that runs on an Amazon EC2 instance. The developer is tasked with containerizing the application and deploying it on Amazon ECS with Fargate. The application writes logs to a local file. What should the developer do to ensure logs are available in Amazon CloudWatch Logs?

A developer is using AWS CloudFormation to manage infrastructure. The developer needs to update a stack that contains a resource that requires replacement. Which TWO actions can the developer take to perform the update with minimal downtime?

A company uses AWS CodePipeline to deploy a web application. The pipeline has a Source stage (CodeCommit), a Build stage (CodeBuild), and a Deploy stage (CodeDeploy). The developer wants to add a manual approval step before the Deploy stage. Which TWO configurations are required?

A developer is deploying a containerized application on Amazon ECS with Fargate. The application requires access to an Amazon RDS database. The developer needs to securely pass database credentials to the container. Which THREE methods can the developer use?

A company deploys a critical application on Amazon ECS with Fargate using a blue/green deployment strategy with AWS CodeDeploy. The deployment group has two target groups, one for blue and one for green. The Application Load Balancer (ALB) is configured with a listener that forwards traffic to the blue target group initially. A recent deployment to the green environment failed, and the green service is in a steady state with zero healthy tasks. The developer needs to ensure that the blue service continues to serve traffic without interruption. The developer checks the CodeDeploy console and sees that the deployment is stuck in the 'InProgress' state with a status of 'Green fleet is not healthy.' What should the developer do to restore the deployment to a healthy state?

A developer is using AWS CodeBuild to build a Java application. The buildspec.yml file includes commands to run unit tests and package the application. Recently, the build started failing with the error 'No space left on device.' The developer notices that the build environment is using the general1.large compute type with 8 GB of disk space. The developer needs to resolve the disk space issue without modifying the application code. The build environment is managed by CodeBuild and the developer cannot change the instance type. What should the developer do?

A developer is using AWS CloudFormation to deploy a stack that includes an Amazon S3 bucket with a bucket policy that grants public read access. The stack creation fails with the error 'Access Denied for bucket: bucket-policy does not allow access.' The developer has full administrative permissions in AWS. The developer verifies that the bucket policy is correctly formatted. What is the most likely cause of the failure?

A company uses 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 for deployment, or some instances in your deployment group are experiencing problems.' The deployment group has a minimum of 2 instances and a maximum of 4. The deployment configuration is CodeDeployDefault.OneAtATime. What is the most likely cause of the failure?

A development team uses AWS Elastic Beanstalk to deploy a containerized application. They notice that after a successful deployment, the environment's health turns from Green to Red. The application logs show no errors. What is the most likely cause?

A company uses AWS CodeBuild to compile and package code, and AWS CodePipeline to orchestrate deployments to Amazon ECS. The pipeline includes a manual approval step. During a recent deployment, the build succeeded but the pipeline failed at the deploy stage with the error 'CannotPullContainerError: manifest for image:tag not found'. The ECS task definition references the image:tag. What is the most likely cause?

A company is deploying a critical application using AWS CodeDeploy. To minimize downtime, they want to perform a blue/green deployment. Which TWO strategies should they implement?

A company uses AWS CloudFormation to manage infrastructure. They need to update a stack that includes an Amazon RDS DB instance. To minimize downtime, they want to perform a rolling update. Which THREE properties must be set in the CloudFormation template?

A developer is using AWS CodePipeline to automate deployments. The pipeline has a Source stage using Amazon S3 and a Deploy stage using AWS Elastic Beanstalk. The developer notices that the pipeline fails at the Deploy stage with the error 'The deployment failed because the version of the application to be deployed could not be found.' Which TWO actions should the developer take to resolve this issue?

A company is using AWS CodeDeploy to deploy an application to an Auto Scaling group. The deployment group has a deployment configuration of CodeDeployDefault.AllAtOnce. During a deployment, some instances fail the deployment. Which THREE actions should the developer take to improve the deployment health?

A startup is deploying a Node.js application using AWS Elastic Beanstalk. They have configured the environment to use a load-balanced, auto-scaled environment with a minimum of 2 instances and a maximum of 4. The application connects to an Amazon RDS MySQL database. After a successful deployment, users report that the application is intermittently returning errors. The developer checks the Elastic Beanstalk logs and finds that the application is timing out when connecting to the database. The developer also notices that the database connection string is hardcoded in the application code. What is the most likely cause of the intermittent errors?

A company is using AWS CodePipeline to automate the deployment of a microservices application to Amazon ECS. The pipeline has the following stages: Source (GitHub), Build (CodeBuild), Deploy (ECS). The Deploy stage uses an ECS task definition and updates the service. Recently, the pipeline failed at the Deploy stage with the error: 'The task definition family is inactive.' The developer checks the ECS console and sees that the task definition family exists but is inactive. The developer also notices that the pipeline uses a parameter 'TASK_DEFINITION_FAMILY' with the value 'my-app'. What is the most likely cause?

A large enterprise is deploying a critical application across multiple AWS regions using AWS CodePipeline and AWS CodeDeploy. The application runs on EC2 instances in an Auto Scaling group. The deployment uses a blue/green strategy. During a cross-region deployment, the pipeline fails in the secondary region with the error 'The deployment group does not exist.' The developer confirms that the deployment group exists in the primary region and has been replicated via AWS CloudFormation StackSets. The developer also checks that the StackSet is successfully deployed in the secondary region. What is the most likely cause?

A developer is deploying a serverless application using the AWS Serverless Application Model (SAM). The application consists of an AWS Lambda function and an Amazon API Gateway REST API. The developer runs 'sam deploy' but the deployment fails with the error: 'Error: Security Constraints Not Satisfied'. The developer checks the IAM policies and confirms that the Lambda function has the necessary permissions. What is the most likely cause?

A company uses AWS CodeCommit for source control and AWS CodeBuild for building a Java application. They have a CodePipeline that deploys the built artifacts to an Auto Scaling group using CodeDeploy. Recently, the build stage started failing with the error: 'BUILD FAILED: Could not resolve dependencies for project'. The developer checks the buildspec.yml and sees that it uses Maven to download dependencies from a private repository. The developer also notices that the build environment is a managed Docker image. What is the most likely cause?

A company is deploying a microservices application on Amazon ECS using the Fargate launch type. The application includes a service that must process messages from an Amazon SQS queue. The developer wants to ensure that the service scales based on the number of messages in the queue. Which scaling solution should the developer implement?

A developer is deploying an AWS Lambda function that processes data from an Amazon Kinesis stream. The function must be idempotent and handle duplicate records. The developer notices that the same record is being processed multiple times. What is the most likely cause of this issue?

A development team wants to automatically deploy a web application to Amazon EC2 instances when new code is pushed to the master branch of an AWS CodeCommit repository. Which AWS service should the team use to orchestrate the build, test, and deployment phases?

A company is using AWS CodeDeploy to deploy a web application to an Auto Scaling group. The deployment fails with the error message '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 developer checks the deployment logs and finds that the ApplicationStop hook failed on some instances. What is the most likely cause of this failure?

A developer is deploying a serverless application using AWS SAM. The application consists of an API Gateway endpoint that triggers an AWS Lambda function. The developer wants to enable canary deployments to gradually shift traffic to a new Lambda version. Which SAM resource attribute should the developer configure?

A company uses AWS Elastic Beanstalk to deploy a web application. The developer wants to update the environment's configuration, such as instance type and environment variables, without causing downtime. Which deployment policy should the developer use?

A developer is deploying a new version of an AWS Lambda function using the AWS CLI. The developer wants to create a new version and update the alias to point to the new version. Which sequence of CLI commands should the developer use?

A company is deploying a containerized application on Amazon EKS. The developer wants to automate the deployment process using a CI/CD pipeline that builds a Docker image, pushes it to Amazon ECR, and updates the Kubernetes deployment. Which tool should the developer use to update the Kubernetes deployment?

A developer is using AWS CodeDeploy to deploy a revision to an EC2/On-Premises deployment group. The deployment fails because the specified deployment configuration requires a minimum of 1 healthy host, but the deployment group has 0 instances. What is the most likely cause?

A developer is designing a CI/CD pipeline for a serverless application using AWS CodePipeline. The pipeline must automatically build and deploy the application when changes are pushed to a CodeCommit repository. The application uses AWS CloudFormation for infrastructure provisioning. Which TWO actions should the developer include in the pipeline?

A developer is deploying a new version of an AWS Lambda function. The function is behind an API Gateway endpoint. The developer wants to use canary deployments to gradually shift traffic to the new version. Which TWO steps should the developer perform?

A company is using AWS CloudFormation to deploy and manage infrastructure. The developer wants to implement a CI/CD pipeline that automatically deploys CloudFormation stacks. The pipeline should be able to create, update, and delete stacks. Which THREE AWS services should the developer use together?

Refer to the exhibit. An IAM policy is attached to an IAM role used by an EC2 instance in a CodeDeploy deployment group. The deployment fails with 'Access Denied' when the CodeDeploy agent tries to register the application revision. What is the most likely cause?

Refer to the exhibit. A developer creates this CloudFormation template and tries to deploy it. The deployment fails with 'CREATE_FAILED' for the S3 bucket resource. What is the most likely cause?

Refer to the exhibit. A developer is troubleshooting a failed CodeDeploy deployment to an EC2 Auto Scaling group. The instance logs show that the 'BeforeInstall' script failed with exit code 1. What should the developer do to resolve the issue?

A development team is using AWS CodeDeploy to deploy a web application to an Auto Scaling group. The deployment fails with a 'HealthCheck' error. The application runs on Amazon EC2 instances behind an Application Load Balancer (ALB). What is the MOST likely cause of this error?

A company wants to deploy a serverless application using AWS Lambda and API Gateway. The deployment process must support automatic rollbacks if the new version fails CloudWatch alarms. Which AWS service should be used to orchestrate this deployment?

A DevOps engineer is implementing a blue/green deployment for a microservice running on Amazon ECS with Fargate. The service is fronted by an Application Load Balancer. During deployment, the new task set fails health checks, but the deployment does not automatically roll back. What is the MOST likely reason?

A company uses AWS CodePipeline to deploy a static website to Amazon S3. The pipeline has a source stage from CodeCommit, a build stage using CodeBuild, and a deploy stage that uses S3 deployment action. The website is served via Amazon CloudFront. After a successful pipeline run, the updated files are in S3, but CloudFront still serves old content. What is the MOST efficient solution?

A team uses AWS CloudFormation to manage infrastructure. They want to deploy a stack that includes an Amazon RDS DB instance. During deployment, the stack creation fails because the DB instance creation times out. The team wants to ensure that subsequent stack creation attempts do not recreate the DB instance from scratch but instead continue from the failed state. Which CloudFormation feature should they use?

A company is deploying a containerized application on Amazon ECS using the Fargate launch type. The deployment must ensure zero downtime. Which ECS deployment configuration should be used?

A developer is using AWS SAM to deploy a serverless application. The SAM template defines an API Gateway REST API and several Lambda functions. During deployment, the developer receives an error: 'Resource creation cancelled' for the API Gateway resource. The developer has sufficient IAM permissions. What is the MOST likely cause?

A company uses AWS CodeDeploy to deploy an application to 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, or some instances in your deployment group are experiencing problems.' The deployment group consists of 4 EC2 instances. The deployment configuration is 'CodeDeployDefault.OneAtATime'. The CodeDeploy agent logs on the failed instance show: 'Error: Script at specified location: scripts/install_dependencies.sh failed with exit code 1.' What should the developer do to resolve this issue?

A developer is deploying a web application using AWS Elastic Beanstalk. The application experiences high traffic during peak hours. The developer wants to ensure that the environment can scale out quickly without manual intervention. Which Elastic Beanstalk configuration should be used?

Which TWO actions can be taken to enable automatic rollback for an AWS CloudFormation stack update that fails? (Select TWO.)

Which THREE components are required to perform a blue/green deployment of an application running on Amazon ECS using AWS CodeDeploy? (Select THREE.)

Which TWO strategies can be used to reduce the risk of a failed deployment when using AWS CodeDeploy? (Select TWO.)

A developer deploys a new version of an AWS Lambda function using the AWS CLI. The deployment fails with a 'ResourceConflictException' error. What is the most likely cause?

A company uses AWS CodeDeploy to deploy a web application to an Auto Scaling group. The deployment fails, and the rollback is triggered. However, the rollback also fails. What is a likely cause?

A DevOps engineer is designing a CI/CD pipeline for a microservices application. The team wants to deploy updates to the production environment gradually and automatically roll back if health checks fail. Which AWS service and deployment configuration should the engineer use?

A developer is deploying a serverless application using the AWS Serverless Application Model (SAM). The developer runs 'sam deploy' and receives an error: 'Error: Failed to create changeset for the stack.' What is a common cause of this error?

A company uses AWS Elastic Beanstalk to deploy a Python web application. After a successful deployment, the environment's health turns 'Severe' and the application returns HTTP 502 errors. What is the most likely cause?

A company is deploying a critical application using AWS CloudFormation. The stack creation fails with a 'ROLLBACK_COMPLETE' status. The engineer wants to troubleshoot the failure without deleting the stack. What should the engineer do?

A developer is using AWS CodeBuild to compile and test code. The build phase fails with the error: 'BUILD_FAILED: Error: No such file or directory.' What is the most likely cause?

A company uses AWS OpsWorks to manage a stack of EC2 instances. After a deployment, the application becomes unresponsive. The engineer suspects that a configuration file was not updated correctly. What is the best way to verify the deployed configuration?

A team is using AWS CodePipeline with multiple stages: Source, Build, Test, and Deploy. The Deploy stage uses AWS CodeDeploy to deploy to an EC2 Auto Scaling group. The pipeline runs successfully, but the application still serves the old version. What is the most likely cause?

A developer is deploying an application using AWS CloudFormation. The stack includes an Amazon RDS DB instance. To ensure secure credential management, which TWO actions should the developer take? (Choose TWO.)

A company is implementing a CI/CD pipeline for a containerized application using Amazon ECS and AWS CodePipeline. The team wants to ensure zero-downtime deployments. Which THREE strategies should the team implement? (Choose THREE.)

A developer is using AWS SAM to deploy a serverless application. The developer wants to enable canary deployments for the Lambda function. Which TWO resources must be configured in the SAM template? (Choose TWO.)

A developer needs to deploy a new version of a Lambda function that uses environment variables for database credentials. Which AWS service should be used to securely store and retrieve the credentials?

A company uses CodePipeline to deploy a web application to Elastic Beanstalk. The deployment fails at the Build stage with an error 'BUILD FAILED'. Which step should the developer take first to troubleshoot?

Which TWO actions should a developer take to minimize downtime when deploying a new version of a production application running on Amazon ECS with Fargate?

A developer uses CodePipeline to deploy a new task definition to an ECS service. The pipeline fails with an access denied error when updating the service. Which missing permission is the most likely cause?

A developer is deploying a serverless application using AWS SAM. The application includes an API Gateway endpoint backed by a Lambda function. The developer wants to enable canary deployments to shift 10% of traffic to the new version for 5 minutes before routing all traffic. Which configuration should the developer add to the SAM template?

A company uses AWS CodeCommit for source control. A developer needs to automate the build and test process for every commit to the 'develop' branch. The developer creates a CodeBuild project and wants to trigger it automatically. What is the most efficient way to set up this automation?

Which THREE factors should a developer consider when choosing between a blue/green deployment and a rolling deployment for an Amazon ECS service?

A developer attempted to create a CloudFormation stack. The stack creation failed and rolled back. Based on the exhibit, which resource caused the failure?

A developer wants to deploy a static website to AWS. The website consists of HTML, CSS, and JavaScript files. Which combination of services provides the most cost-effective and scalable solution?

Which TWO approaches can a developer use to automate the deployment of a microservices application to Amazon ECS with Fargate, ensuring that each microservice is independently deployable and can scale based on demand?

The developer tries to deploy this stack but receives an error: 'CREATE_FAILED: LambdaExecutionRole - Resource creation cancelled'. The Lambda function is not created. What is the most likely cause?

A developer is deploying a new version of a Lambda function using the AWS CLI. The developer wants to shift 10% of traffic to the new version and then gradually increase to 100% over 10 minutes. Which CLI command should the developer use?

A developer needs to deploy a containerized application on AWS. The application requires persistent storage that can be shared across multiple containers running on different EC2 instances. Which AWS service should the developer use?

Which THREE steps should a developer include in a CI/CD pipeline to deploy a serverless application using AWS SAM? (Choose three.)

A developer performed a CodeDeploy deployment to an Auto Scaling group. The deployment status is Failed with code HEALTH_CONSTRAINTS. Based on the exhibit, what is the most likely cause?

A developer is deploying a serverless application using AWS SAM. The application includes an API Gateway endpoint and a Lambda function. The developer wants to ensure that the Lambda function can be invoked only by the API Gateway and not directly. Which configuration should be used?

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 application is deployed to a t2.micro instance with 1 GB of RAM. The deployment uses an in-place update with a deployment configuration that has a minimum of 1 healthy host. What is the most likely cause of the failure?

A developer is deploying a Lambda function using CloudFormation. The function code is stored in an S3 bucket. The developer wants to automatically update the function when the S3 object is updated. Which approach should be used?

A company uses AWS Elastic Beanstalk to deploy a web application. The development team wants to deploy a new version of the application to a separate environment for testing before switching production traffic. Which deployment strategy should be used?

A developer is using AWS CodeBuild to compile a Java application. The build project is configured with a 'buildspec.yml' file. The developer notices that the build succeeds on the local machine but fails in CodeBuild with the error: 'Error: Could not find or load main class com.example.App'. What is the most likely cause?

A company is using AWS CloudFormation to manage infrastructure. The developer wants to update a stack that includes an RDS database. The update requires replacing the database with a new one. Which stack update policy should the developer use to minimize downtime?

A developer is deploying a serverless application using the AWS Serverless Application Model (SAM). The developer wants to set environment variables for the Lambda function that are specific to the deployment stage (e.g., dev, prod). How should the developer accomplish this?

A company uses AWS CodePipeline to automate deployments. The pipeline source stage uses Amazon S3. The developer wants to automatically trigger the pipeline when a new version of the source file is uploaded. The developer has configured S3 event notifications to invoke a Lambda function that starts the pipeline. However, the pipeline is not triggering. What is the most likely cause?

A developer is using AWS CloudFormation to deploy a stack that includes an Amazon ECS service. The developer wants to ensure that the ECS service is updated with a new task definition before the old tasks are stopped. Which deployment controller type should be used?

A company is implementing a CI/CD pipeline using AWS CodeCommit, CodeBuild, and CodeDeploy. The developer wants to ensure that the pipeline automatically deploys to production only after a manual approval step. Which TWO actions should the developer take?

A developer is using AWS CodeDeploy to deploy an application to an Auto Scaling group. The deployment is set to use a 'OneAtATime' deployment configuration. The developer wants to ensure that the deployment does not cause downtime. Which TWO configurations are necessary?

A development team is using AWS Elastic Beanstalk to deploy a web application. The team wants to perform a blue/green deployment. Which THREE steps are required to complete the blue/green deployment?

A company uses 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'. The deployment configuration is CodeDeployDefault.AllAtOnce. What is the most likely cause?

A developer needs to deploy a serverless application using AWS CloudFormation. The application includes an AWS Lambda function, an Amazon API Gateway REST API, and an Amazon DynamoDB table. The developer wants to create a stack that can be updated without downtime. Which CloudFormation feature should be used?

A developer is using AWS Elastic Beanstalk to deploy a Python web application. The application requires a specific version of a Python package that is not pre-installed on the Elastic Beanstalk platform. How should the developer ensure the package is installed on all environment instances?

A development team uses AWS CodeCommit for source control and AWS CodePipeline for CI/CD. The team wants to automatically deploy changes to a staging environment when a pull request is merged into the main branch. Which CodePipeline trigger configuration should be used?

A company uses AWS CloudFormation to manage its infrastructure. The developer wants to update a stack but only if the update does not cause any resource replacement. Which CloudFormation stack update option should be used?

A developer is deploying an application on Amazon ECS using the Fargate launch type. The application needs to read configuration data from an Amazon S3 bucket. How should the developer securely provide the S3 bucket name to the container at runtime?

A team uses AWS CodeBuild to run automated tests. The buildspec.yaml file contains a 'pre_build' phase that sets environment variables. During a build, the build fails with 'Error: Cannot find module 'express' when running a Node.js application. The application's package.json is in the source root. What is the most likely cause?

A company deploys a microservices application using AWS CloudFormation. Each microservice is deployed as a separate stack. The developer wants to pass the output values (e.g., API endpoint URLs) from one stack to another. Which CloudFormation feature should be used?

A developer uses AWS SAM (Serverless Application Model) to define a serverless application. The developer wants to run the application locally for testing. Which AWS SAM CLI command should be used?

A company is deploying a new web application on Amazon EC2 instances behind an Application Load Balancer. The application must be deployed with no downtime. The deployment uses AWS CodeDeploy with a Blue/Green deployment configuration. Which TWO actions should be taken to achieve zero-downtime deployment? (Choose TWO.)