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Amazon DVA-C02 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Development with AWS Services	32%	- Integrate AWS services into applications 1. Implement messaging and event-driven workflows 2. Use AWS Lambda, API Gateway, Amazon EventBridge - Interact with AWS data services 1. Work with Amazon DynamoDB, Amazon S3 2. Implement caching and data storage strategies - Write code for applications hosted on AWS 1. Implement architectural patterns 2. Develop serverless applications 3. Use AWS SDKs and APIs
Topic 2: Security	26%	- Secure application data 1. Implement encryption at rest and in transit 2. Manage secrets and credentials securely - Implement authentication and authorization 1. Use Amazon Cognito for identity management 2. Manage IAM roles, policies, and permissions - Apply security best practices 1. Follow AWS Well-Architected Framework security principles 2. Validate application security configurations
Topic 3: Deployment	24%	- Prepare application artifacts for deployment 1. Use infrastructure as code (AWS CloudFormation, AWS SAM) 2. Package code and dependencies - Implement CI/CD pipelines 1. Automate deployment and testing workflows 2. Use AWS CodePipeline, CodeBuild, CodeDeploy - Deploy applications on AWS 1. Deploy to AWS Lambda, Amazon EC2, Elastic Beanstalk 2. Perform safe updates and rollbacks
Topic 4: Troubleshooting and Optimization	18%	- Debug and resolve errors 1. Resolve integration and configuration problems 2. Identify and fix code defects - Troubleshoot application issues 1. Analyze logs, metrics, and traces 2. Use Amazon CloudWatch, AWS X-Ray for monitoring - Optimize application performance 1. Optimize resource usage and costs 2. Improve latency and throughput

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Amazon AWS Certified Developer - Associate Sample Questions (Q708-Q713):

NEW QUESTION # 708
A company has an application that is deployed on AWS Elastic Beanstalk. The application generates user- specific PDFs and stores the PDFs in an Amazon S3 bucket. The application then uses Amazon Simple Email Service (Amazon SES) to send the PDFs by email to subscribers.
Users no longer access the PDFs 90 days after the PDFs are generated. The S3 bucket is not versioned and contains many obsolete PDFs.
A developer must reduce the number of files in the S3 bucket by removing PDFs that are older than 90 days.
Which solution will meet this requirement with the LEAST development effort?

A. Update the application code. In the code, add a rule to scan all the objects in the S3 bucket every day and to delete objects after 90 days.
B. Create an S3 Lifecycle rule for the S3 bucket to expire objects after 90 days.
C. Create an AWS Lambda function. Program the Lambda function to scan all the objects in the S3 bucket every day and to delete objects after 90 days.
D. Partition the S3 objects with a <year>/<month>/<day> key prefix. Create an AWS Lambda function to remove objects that have prefixes that have reached the expiration date.

Answer: B

NEW QUESTION # 709
An application that runs on AWS receives messages from an Amazon Simple Queue Service (Amazon SQS) queue and processes the messages in batches. The application sends the data to another SQS queue to be consumed by another legacy application. The legacy system can take up to 5 minutes to process some transaction data.
A developer wants to ensure that there are no out-of-order updates in the legacy system. The developer cannot alter the behavior of the legacy system.
Which solution will meet these requirements?

A. Use an SQS standard queue with a SendMessageBatchRequestEntry data type. Configure the visibility timeout value.
B. Use an SQS standard queue with a SendMessageBatchRequestEntry data type. Configure the DelaySeconds values.
C. Use an SQS FIFO queue. Configure the DelaySeconds value.
D. Use an SQS FIFO queue. Configure the visibility timeout value.

Answer: D

NEW QUESTION # 710
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. Add an AWS CodeBuild stage to CodePipeline to run the aws apigateway create-deployment AWS CLI command.
B. Add an action to CodePipeline to run the aws cloudfront create-invalidation AWS CLI command.
C. Specify the disable-rollback option during the update-stack operation.
D. Unset the CloudFormation stack failure options.

Answer: A

NEW QUESTION # 711
A development team is creating a serverless application that uses AWS Lambda functions. The team wants to streamline a testing workflow by sharing test events across multiple developers within the same AWS account. The team wants to ensure all developers can use consistent test events without compromising security.
Which solution will best meet these requirements?

A. Store test events in an Amazon DynamoDB table. Create an AWS Lambda function to retrieve shared test events for the developers.
B. Set up a Git repository to store test events. Provide the developers with access to the repository.
C. Export test events as JSON files. Store the files in an Amazon S3 bucket. Configure granular IAM permissions to allow the developers to access the S3 bucket.
D. Configure test events to be shareable. Configure granular IAM permissions to allow the developers to access shared test events.

Answer: C

Explanation:
Storing JSON test event files in an S3 bucket provides a centralized, cost-effective, and highly available solution.
Granular IAM policies can restrict access to specific developers or roles, ensuring security while maintaining consistency for shared test events.
This solution has minimal operational overhead and integrates easily with existing workflows.

NEW QUESTION # 712
A developer is working on a Python application that runs on Amazon EC2 instances. The developer wants to enable tracing of application requests to debug performance issues in the code.
Which combination of actions should the developer take to achieve this goal? (Select TWO)

A. Install the Amazon CloudWatch agent on the EC2 instances.
B. Configure the application to write trace data to /Var/log-/xray.
C. Install the AWS X-Ray daemon on the EC2 instances.
D. Install and configure the AWS X-Ray SDK for Python in the application.
E. Configure the application to write JSON-formatted togs to /var/log/cloudwatch.

Answer: C,D

Explanation:
This solution will meet the requirements by using AWS X-Ray to enable tracing of application requests to debug performance issues in the code. AWS X-Ray is a service that collects data about requests that the applications serve, and provides tools to view, filter, and gain insights into that data. The developer can install the AWS X-Ray daemon on the EC2 instances, which is a software that listens for traffic on UDP port 2000, gathers raw segment data, and relays it to the X-Ray API. The developer can also install and configure the AWS X-Ray SDK for Python in the application, which is a library that enables instrumenting Python code to generate and send trace data to the X-Ray daemon. Option A is not optimal because it will install the Amazon CloudWatch agent on the EC2 instances, which is a software that collects metrics and logs from EC2 instances and on-premises servers, not application performance data. Option C is not optimal because it will configure the application to write JSON-formatted logs to /var/log/cloudwatch, which is not a valid path or destination for CloudWatch logs. Option D is not optimal because it will configure the application to write trace data to /var/log/xray, which is also not a valid path or destination for X-Ray trace data.

NEW QUESTION # 713
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