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Amazon DVA-C02 Exam Syllabus Topics:

Section	Weight	Objectives
Troubleshooting and Optimization	18%	- Assist in a root cause analysis 1. Application logging 2. Error handling and retries 3. Amazon CloudWatch Logs 4. AWS X-Ray 5. AWS CloudTrail - Optimize applications by using AWS services and features 1. Data storage optimization 2. Caching strategies (ElastiCache, CloudFront) 3. Memory and compute optimization 4. Cost optimization 5. Concurrency and throttling - Instrument code for observability 1. Custom metrics 2. Amazon CloudWatch metrics 3. Amazon CloudWatch alarms 4. AWS X-Ray 5. Structured logging
Security	26%	- Manage sensitive data in application code 1. Environment variables 2. AWS Systems Manager Parameter Store 3. AWS Secrets Manager 4. Encryption of data at rest and in transit - Implement encryption by using AWS services 1. Amazon S3 encryption 2. AWS CloudHSM 3. AWS Secrets Manager 4. AWS KMS 5. AWS Certificate Manager - Implement authentication and/or authorization for applications and AWS services 1. User pools and identity pools in Amazon Cognito 2. Bearer tokens (JWT, OAuth, AWS STS) 3. Role-based access control (RBAC) 4. Identity federation (SAML, OpenID Connect, Amazon Cognito) 5. Resource-based policies, service policies, and principal policies
Deployment	24%	- Prepare application artifacts to be deployed to AWS 1. Lambda deployment packages 2. AWS CDK 3. AWS CloudFormation 4. AWS SAM 5. Docker containers - Automate deployment testing 1. AWS CodeBuild 2. AWS CodeCommit 3. AWS CodePipeline 4. AWS CodeDeploy - Deploy code by using AWS CI/CD services 1. AWS CodeBuild 2. AWS CodeCommit 3. Blue/green deployments 4. GitHub integration 5. Canary deployments 6. Rolling deployments 7. AWS CodePipeline 8. AWS CodeDeploy - Test applications in development environments 1. Mocking AWS services 2. AWS SAM local 3. Local testing of Lambda functions
Development with AWS Services	32%	- Use data stores in application development 1. Amazon DynamoDB 2. Amazon ElastiCache 3. Amazon S3 4. Amazon RDS 5. Amazon EFS - Develop code for AWS serverless applications 1. AWS AppSync 2. AWS Step Functions 3. Amazon API Gateway 4. Amazon EventBridge - Develop code for applications hosted on AWS 1. Amazon DynamoDB 2. Amazon SQS 3. Amazon API Gateway 4. AWS CloudFormation 5. AWS CLI 6. AWS Lambda 7. AWS SDKs 8. Amazon Cognito 9. Amazon S3 10. Amazon SNS

>> DVA-C02 Valid Exam Question <<

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Amazon AWS Certified Developer - Associate Sample Questions (Q737-Q742):

NEW QUESTION # 737
A company has a web application that contains an Amazon API Gateway REST API. A developer has created an AWS CloudFormation template for the initial deployment of the application. The developer has deployed the application successfully as part of an AWS CodePipeline continuous integration and continuous delivery (CI/CD) process. All resources and methods are available through the deployed stage endpoint.
The CloudFormation template contains the following resource types:
* AWS::ApiGateway::RestApi
* AWS::ApiGateway::Resource
* AWS::ApiGateway::Method
* AWS:ApiGateway::Stage
* AWS::ApiGateway:;Deployment
The developer adds a new resource to the REST API with additional methods and redeploys the template.
CloudFormation reports that the deployment is successful and that the stack is in the UPDATE_COMPLETE state. However, calls to all new methods are returning 404 (Not Found) errors.
What should the developer do to make the new methods available?

A. Unset the Cloud Forma lion stack failure options.
B. Add an AWS CodeBuild stage lo CodePipeline to run the aws apigateway create-deployment AWS CLI command.
C. Specify the disable-rollback option during the update-stack operation.
D. Add an action to CodePipeline to run the aws cloudfront create-invalidation AWS CLI command.

Answer: B

NEW QUESTION # 738
A company regularly receives route status updates from its delivery trucks as events in Amazon EventBridge. The company is building an API-based application in a VPC that will consume and process the events to create a delivery status dashboard. The API application must not be available by using public IP addresses because of security and compliance requirements. How should the company send events from EventBridge to the API application?

A. Create an AWS Lambda function that runs in the same VPC as the API application. Configure the function as an EventBridge target. Use the function to send events to the API.
B. Create an internet-facing Application Load Balancer (ALB) in front of the API application. Associate a security group with rules that block access from all external sources except for EventBridge.
Configure the ALB as an EventBridge target.
C. Use the application API endpoint in the VPC as a target for EventBridge. Send events directly to the application API endpoint from EventBridge.
D. Create an internet-facing Network Load Balancer (NLB) in front of the API application. Associate a security group with rules that block access from all external sources except for EventBridge.
Configure the NLB as an EventBridge target.

Answer: A

Explanation:
Running an AWS Lambda function within the same VPC ensures secure communication without exposing the API application to public IP addresses. The Lambda function can serve as a secure EventBridge target to send events to the API.

NEW QUESTION # 739
A developer at a company recently created a serverless application to process and show data from business reports. The application's user interface (UI) allows users to select and start processing the files. The Ul displays a message when the result is available to view. The application uses AWS Step Functions with AWS Lambda functions to process the files. The developer used Amazon API Gateway and Lambda functions to create an API to support the UI.
The company's Ul team reports that the request to process a file is often returning timeout errors because of the see or complexity of the files. The Ul team wants the API to provide an immediate response so that the Ul can deploy a message while the files are being processed. The backend process that is invoked by the API needs to send an email message when the report processing is complete.
What should the developer do to configure the API to meet these requirements?

A. Change the API Gateway route to add an X-Amz-Invocation-Type header win a sialic value of 'Event' in the integration request Deploy the API Gateway stage to apply the changes.
B. Change the configuration of the Lambda function that implements the request to process a file.
Configure the maximum age of the event so that the Lambda function will ion asynchronously.
C. Change the API Gateway timeout value to match the Lambda function ominous value. Deploy the API Gateway stage to apply the changes.
D. Change the API Gateway route to add an X-Amz-Target header with a static value of 'A sync' in the integration request Deploy me API Gateway stage to apply the changes.

Answer: A

Explanation:
Explanation
This solution allows the API to invoke the Lambda function asynchronously, which means that the API will return an immediate response without waiting for the function to complete. The X-Amz-Invocation-Type header specifies the invocation type of the Lambda function, and setting it to 'Event' means that the function will be invoked asynchronously. The function can then use Amazon Simple Email Service (SES) to send an email message when the report processing is complete.

NEW QUESTION # 740
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. 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.
B. 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.
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: B

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.

NEW QUESTION # 741
A developer is creating an application that will store personal health information (PHI). The PHI needs to be encrypted at all times. An encrypted Amazon RDS for MySQL DB instance is storing the dat a. The developer wants to increase the performance of the application by caching frequently accessed data while adding the ability to sort or rank the cached datasets.
Which solution will meet these requirements?

A. Create an Amazon ElastiCache for Redis instance. Enable encryption of data in transit and at rest. Store frequently accessed data in the cache.
B. Create an Amazon ElastiCache for Memcached instance. Enable encryption of data in transit and at rest. Store frequently accessed data in the cache.
C. Create an Amazon RDS for MySQL read replica. Connect to the read replica by using SSL. Configure the read replica to store frequently accessed data.
D. Create an Amazon DynamoDB table and a DynamoDB Accelerator (DAX) cluster for the table. Store frequently accessed data in the DynamoDB table.

Answer: A

NEW QUESTION # 742
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