A team of developers is using an AWS CodePipeline pipeline as a continuous integration and continuous delivery (CI/CD) mechanism for a web application. A developer has written unit tests to programmatically test the functionality of the application code. The unit tests produce a test report that shows the results of each individual check. The developer now wants to run these tests automatically during the CI/CD process.
Which solution will meet this requirement with the LEAST operational effort?

A. Write a Git pre-commit hook that runs the tests before every commit. Ensure that each developer who is working on the project has the pre-commit hook installed locally. Review the test report and resolve any issues before pushing changes to AWS CodeCommit.
B. Add a new stage to the pipeline. Use AWS CodeBuild as the provider. Add the new stage after the stage that deploys code revisions to the test environment. Write a buildspec that fails the CodeBuild stage if any test does not pass. Use the test reports feature of CodeBuild to integrate the report with the CodeBuild console. View the test results in CodeBuild. Resolve any issues.
C. Add a new stage to the pipeline. Use AWS CodeBuild as the provider. Add the new stage before the stage that deploys code revisions to the test environment. Write a buildspec that fails the CodeBuild stage if any test does not pass. Use the test reports feature of CodeBuild to integrate the report with the CodeBuild console. View the test results in CodeBuild. Resolve any issues.
D. Add a new stage to the pipeline. Use Jenkins as the provider. Configure CodePipeline to use Jenkins to run the unit tests. Write a Jenkinsfile that fails the stage if any test does not pass. Use the test report plugin for Jenkins to integrate the report with the Jenkins dashboard. View the test results in Jenkins. Resolve any issues.

A developer has built an application running on AWS Lambda using AWS Serverless Application Model (AWS SAM).
What is the correct sequence of steps to successfully deploy the application?

A. 1. Build the SAM template in Amazon EC2.
2. Package the SAM template to Amazon EBS storage.
3. Deploy the SAM template from Amazon EBS.
B. 1. Build the SAM template locally.
2. Package the SAM template onto Amazon S3.
3. Deploy the SAM template from Amazon S3.
C. 1. Build the SAM template locally.
2. Deploy the SAM template from Amazon S3.
3. Package the SAM template for use.
D. 1. Build the SAM template locally.
2. Package the SAM template from AWS CodeCommit.
3. Deploy the SAM template to CodeCommit.

A company configures an Amazon S3 bucket to deliver S3 object events to Amazon EventBridge (Amazon CloudWatch Events). An EventBridge rule invokes an AWS Lambda function for each object event that is received from the S3 bucket.
A developer is working on a new version of the Lambda function. To ensure that the new Lambda function works as expected, the developer must run a repeatable test that uses realistic S3 bucket object events. The developer must minimize the amount of code and infrastructure that are required to support the test.
Which solution will meet these requirements?

A. Create another S3 bucket that can deliver object events to EventBridge. Add another EventBridge rule to deliver data events from the new S3 bucket to the new Lambda function Develop a tool to update objects in the new S3 bucket to produce the test S3 object events.
B. Add the new Lambda function as an additional target of the existing EventBridge rule. Deliver the S3 object events to the existing Lambda function and the new Lambda function simultaneously.
C. Use EventBridge to archive and replay production S3 object events. Set up a new EventBridge rule to deliver replayed S3 object events to the new Lambda function.
D. Develop a tool that uses the EventBridge PutEvents API operation to publish aws.s3 data events. Add a new EventBridge rule that delivers the aws.s3 events to the new Lambda function.

A developer is creating an Amazon DynamoDB table. The entire table must be encrypted at rest.
Which solution will meet this requirement MOST cost-effectively?

A. Create the DynamoDB table by using default encryption settings.
B. Encrypt the data by using the DynamoDB Encryption Client.
C. During creation of the DynamoDB table, configure encryption at rest with an AWS Key Management Service (AWS KMS) AWS managed key.
D. During creation of the DynamoDB table, configure encryption at rest with an AWS Key Management Service (AWS KMS) customer managed key.

A developer is creating a command line script to launch an Amazon EC2 instance at a preset time with a cron job. The developer will provide a user data script to start a task and then terminate the instance. The task cannot be interrupted and must run to completion.
How should the developer launch the EC2 instance?

A. Use the ec2 start-instances command.
B. Use the ec2 request-spot-instances command.
C. Use the ec2 run-instances command.
D. Use the ec2 purchase-scheduled-instances command.

A developer wants to implement authentication using Amazon Cognito user pools for an existing API in Amazon API Gateway. After creating the Amazon Cognito user pool, the developer tests the GET request to the API.
Unauthenticated requests to the API return a 200 OK status response.
Which combination of additional steps are required to complete the authentication implementation? (Choose two.)

A. Create an Amazon Cognito authorizer in API Gateway and specify the Amazon Cognito user pool.
B. Create an AWS Lambda authorizer in API Gateway and specify the Amazon Cognito user pool.
C. Specify the authorizer in the GET method section of API Gateway and redeploy the API.
D. Use Amazon Cognito user pools to make and authenticate the request to API Gateway.
E. Create an Amazon Cognito authorizer in API Gateway and specify the Amazon Cognito identity pool.

A developer is designing a serverless application that customers use to select seats for a concert venue.
Customers send the ticket requests to an Amazon API Gateway API with an AWS Lambda function that acknowledges the order and generates an order ID. The application includes two additional Lambda functions: one for inventory management and one for payment processing. These two Lambda functions run in parallel and write the order to an Amazon Dynamo DB table.
The application must provide seats to customers according to the following requirements. If a seat is accidently sold more than once, the first order that the application received must get the seat. In these cases, the application must process the payment for only the first order. However, if the first order is rejected during payment processing, the second order must get the seat. In these cases, the application must process the payment for the second order.
Which solution will meet these requirements?

A. Send the order ID to an Amazon Simple Notification Service (Amazon SNS) FIFO topic that fans out to one Amazon Simple Queue Service (Amazon SQS) FIFO queue for inventory management and another SQS FIFO queue for payment processing.
B. Change the Lambda function that generates the order ID to initiate the Lambda function for inventory management. Then initiate the Lambda function for payment processing.
C. Send the order ID to an Amazon Simple Notification Service (Amazon SNS) topic. Subscribe the Lambda functions for inventory management and payment processing to the topic.
D. Deliver the order ID to an Amazon Simple Queue Service (Amazon SQS) queue. Configure the Lambda functions for inventory management and payment processing to poll the queue.

A company's new mobile app uses Amazon API Gateway. As the development team completes a new release of its APIs, a developer must safely and transparently roll out the API change.
What is the SIMPLEST solution for the developer to use for rolling out the new API version to a limited number of users through API Gateway?

A. Create a new API in API Gateway. Direct a portion of the traffic to the new API using an Amazon Route 53 weighted routing policy.
B. Validate the new API version and promote it to production during the window of lowest expected utilization.
C. Implement an Amazon CloudWatch alarm to trigger a rollback if the observed HTTP 500 status code rate exceeds a predetermined threshold.
D. Use the canary release deployment option in API Gateway. Direct a percentage of the API traffic using the canarySettings setting.

A company caches session information for a web application in an Amazon DynamoDB table. The company wants an automated way to delete old items from the table.
What is the simplest way to do this?

A. Write a script that deletes old records; schedule the script as a cron job on an Amazon EC2 instance.
B. Add an attribute with the expiration time; enable the Time To Live feature based on that attribute.
C. Each day, create a new table to hold session data; delete the previous day's table.
D. Add an attribute with the expiration time; name the attribute ItemExpiration.

A developer is using AWS Elastic Beanstalk to create a deployment for a web application that supports ecommerce. According to a company requirement. Amazon EC2 instances that host one version of the application must be retired when the deployment of a new version is complete.
Which deployment methods can the developer use to meet this requirement? (Choose two.)

A. All-al-once deployment
B. In-place deployment
C. Rolling deployment without an additional batch
D. Blue/green deployment
E. Immutable deployment