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Amazon AWS Certified Developer - Associate Sample Questions (Q219-Q224):

NEW QUESTION # 219
A developer updates an AWS Lambda function that an Amazon API Gateway API uses. The API is the backend for a web application.
The developer needs to test the updated Lambda function before deploying the Lambda function to production. The testing must not affect any production users of the web application.
Which solution will meet these requirements in the MOST operationally efficient way?

A. Create a canary release deployment for the existing API stage. Deploy the API to the existing stage. Test the updated Lambda function by using the existing URL.
B. Create a new AWS CloudFormation stack to deploy a copy of the entire production API and Lambda function. Use the stack's API URL to test the updated Lambda function.
C. Create a new test API stage in API Gateway. Add stage variables to deploy the updated Lambda function to only the test stage. Test the updated Lambda function by using the new stage URL.
D. Update the API Gateway API endpoint type to private. Deploy the changes to the existing API stage. Test the API by using the existing URL.

Answer: C

NEW QUESTION # 220
A developer is building a serverless application that runs on AWS. The developer wants to create an accelerated development workflow that deploys incremental changes to AWS for testing. The developer wants to deploy the incremental changes but does not want to fully deploy the entire application to AWS for every code commit.
What should the developer do to meet these requirements?

A. Use the AWS Serverless Application Model (AWS SAM) to build the application. Use the sam sync command to deploy the incremental changes.
B. Use the AWS Cloud Development Kit (AWS CDK) to build the application. Use the cdk bootstrap command to deploy the incremental changes.
C. Use the AWS Serverless Application Model (AWS SAM) to build the application. Use the sam init command to deploy the incremental changes.
D. Use the AWS Cloud Development Kit (AWS CDK) to build the application. Use the cdk synth command to deploy the incremental changes.

Answer: A

NEW QUESTION # 221
A developer has observed an increase in bugs in the AWS Lambda functions that a development team has deployed in its Node is application. To minimize these bugs, the developer wants to impendent automated testing of Lambda functions in an environment that Closely simulates the Lambda environment.
The developer needs to give other developers the ability to run the tests locally. The developer also needs to integrate the tests into the team's continuous integration and continuous delivery (Ct/CO) pipeline before the AWS Cloud Development Kit (AWS COK) deployment.
Which solution will meet these requirements?

A. Install the AWS Serverless Application Model (AWS SAW) CLI tool Use the Sam local generate-event command to generate sample events for me automated tests. Create automated test scripts that use the Sam local invoke command to invoke the Lambda functions. Check the response Document the test scripts tor the other developers on the team Update the CI/CD pipeline to run the test scripts.
B. Create sample events based on the Lambda documentation. Create a Docker container from the Node is base image to invoke the Lambda functions. Check the response Document how to run the Docker container for the more developers on the team update the CI/CD pipeline to run the Docker container.
C. Install a unit testing framework that reproduces the Lambda execution environment. Create sample events based on the Lambda Documentation Invoke the handler function by using a unit testing framework. Check the response Document how to run the unit testing framework for the other developers on the team. Update the OCD pipeline to run the unit testing framework.
D. Create sample events based on the Lambda documentation. Create automated test scripts that use the cdk local invoke command to invoke the Lambda functions. Check the response Document the test scripts for the other developers on the team Update the CI/CD pipeline to run the test scripts.

Answer: A

Explanation:
Explanation
This solution will meet the requirements by using AWS SAM CLI tool, which is a command line tool that lets developers locally build, test, debug, and deploy serverless applications defined by AWS SAM templates. The developer can use sam local generate-event command to generate sample events for different event sources such as API Gateway or S3. The developer can create automated test scripts that use sam local invoke command to invoke Lambda functions locally in an environment that closely simulates Lambda environment.
The developer can check the response from Lambda functions and document how to run the test scripts for other developers on the team. The developer can also update CI/CD pipeline to run these test scripts before deploying with AWS CDK. Option A is not optimal because it will use cdk local invoke command, which does not exist in AWS CDK CLI tool. Option B is not optimal because it will use a unit testing framework that reproduces Lambda execution environment, which may not be accurate or consistent with Lambda environment. Option D is not optimal because it will create a Docker container from Node.js base image to invoke Lambda functions, which may introduce additional overhead and complexity for creating and running Docker containers.
References: [AWS Serverless Application Model (AWS SAM)], [AWS Cloud Development Kit (AWS CDK)]

NEW QUESTION # 222
An e-commerce web application that shares session state on-premises is being migrated to AWS.
The application must be fault tolerant, natively highly scalable, and any service interruption should not affect the user experience.
What is the best option to store the session state?

A. Enable session stickiness using elastic load balancers.
B. Store the session state in Amazon ElastiCache.
C. Store the session state in Amazon S3.
D. Store the session state in Amazon CloudFront.

Answer: B

NEW QUESTION # 223
A developer is creating an application on Amazon Elastic Container Service (Amazon ECS). The developer needs to configure the application parameters. The developer must configure limits for the application's maximum number of simultaneous connections and maximum number of transactions per second.
The maximum number of connections and transactions can change in the future. The developer needs a solution that can automatically deploy these changes to the application, as needed, without causing downtime.
Which solution will meet these requirements?

A. Install the AWS AppConfig agent on Amazon ECS. Configure an IAM role with access to AWS AppConfig. Make the deployment changes by using AWS AppConfig. Specify Canary10Percent20Minutes as the deployment strategy.
B. Create an AWS Lambda function to make the configuration changes. Create an Amazon CloudWatch alarm that monitors the Lambda function every 5 minutes to check if the Lambda function has been updated. When the Lambda function is updated, deploy the changes by using AWS CodeDeploy.
C. Bootstrap the application to use the AWS Cloud Development Kit (AWS CDK) and make the configuration changes. Specify the ECSCanary10Percent15Minutes launch type in the properties section of the ECS resource. Deploy the application by using the AWS CDK to implement the changes.
D. Make the configuration changes for the application. Use AWS CodeDeploy to create a deployment configuration. Specify an in-place deployment to deploy the changes.

Answer: A

Explanation:
The AWS AppConfig Agent is the recommended method for retrieving AWS AppConfig feature flags or free form configuration data. The agent automatically implements best practices and may lower your cost of using AWS AppConfig as a result of fewer API calls to retrieve configurations.
https://docs.aws.amazon.com/appconfig/latest/userguide/appconfig-agent-how-to-use.html

NEW QUESTION # 224
......

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Test DVA-C02 Online & DVA-C02 Real Brain Dumps

100% Pass Amazon - DVA-C02 - Reliable Test AWS Certified Developer - Associate Online

Amazon AWS Certified Developer - Associate Sample Questions (Q219-Q224):

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