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Amazon DVA-C02 Exam Syllabus Topics:

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

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Amazon AWS Certified Developer - Associate Sample Questions (Q882-Q887):

NEW QUESTION # 882
A company is developing a weather forecast application that displays forecasts for cities within a single country. Weather data is stored in an Amazon DynamoDB table named Forecasts with attributes CityId, Temperature, and ForecastDate.
The application is read heavy. Most read requests target the current day's forecast for a small number of very large cities. The company must design a partition key strategy that ensures the most even distribution of read traffic.
Which solution will meet these requirements?

A. Use ForecastDate with a calculated suffix as the partition key and CityId as the sort key.
B. Use a numeric index as the partition key and ForecastDate as the sort key.
C. Use ForecastDate as the partition key and CityId as the sort key.
D. Use CityId with a calculated suffix as the partition key and ForecastDate as the sort key.

Answer: D

Explanation:
Amazon DynamoDB performance depends heavily on partition key design. AWS documentation warns against access patterns that repeatedly target the same partition key, as this causes hot partitions, even in on- demand mode.
In this scenario, most reads focus on the current day's forecast for a small number of large cities. Using CityId alone as the partition key would cause hot partitions for those cities. Adding a calculated suffix (such as a hash or modulo value) to CityId spreads read requests across multiple partitions while still allowing efficient querying.
Using ForecastDate as the partition key (Options C and D) would concentrate traffic on a single value (today' s date), creating severe hot partition issues. Option B lacks a meaningful access pattern and complicates queries.
AWS documentation explicitly recommends key-suffix techniques for workloads with skewed access patterns to distribute traffic evenly. Therefore, using CityId with a calculated suffix as the partition key is the correct design.

NEW QUESTION # 883
A developer is creating an AWS Lambda function that will connect to an Amazon RDS for MySQL instance. The developer wants to store the database credentials. The database credentials need to be encrypted and the database password needs to be automatically rotated.
Which solution will meet these requirements?

A. Store the database credentials as environment variables for the Lambda function. Set the environment variables to rotate automatically.
B. Store the database credentials in AWS Systems Manager Parameter Store as secure string parameters. Set up managed rotation on the parameters.
C. Store the database credentials in AWS Secrets Manager. Set up managed rotation on the database credentials.
D. Store the database credentials in the X-Amz-Security-Token parameter. Set up managed rotation on the parameter.

Answer: C

NEW QUESTION # 884
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. Specify the disable-rollback option during the update-stack operation.
B. Unset the CloudFormation stack failure options.
C. Add an action to CodePipeline to run the aws cloudfront create-invalidation AWS CLI command.
D. Add an AWS CodeBuild stage to CodePipeline to run the aws apigateway create-deployment AWS CLI command.

Answer: D

NEW QUESTION # 885
A company wants to deploy and maintain static websites on AWS. Each website's source code is hosted in one of several version control systems, including AWS CodeCommit, Bitbucket, and GitHub.
The company wants to implement phased releases by using development, staging, user acceptance testing, and production environments in the AWS Cloud. Deployments to each environment must be started by code merges on the relevant Git branch. The company wants to use HTTPS for all data exchange. The company needs a solution that does not require servers to run continuously.
Which solution will meet these requirements with the LEAST operational overhead?

A. Host each website in different Amazon S3 buckets for each environment. Configure AWS CodePipeline to pull source code from version control. Add an AWS CodeBuild stage to copy source code to Amazon S3.
B. Host each website in AWS Elastic Beanstalk with multiple environments. Use the EB CLI to link each repository branch. Integrate AWS CodePipeline to automate deployments from version control code merges.
C. Host each website on its own Amazon EC2 instance. Write a custom deployment script to bundle each website's static assets. Copy the assets to Amazon EC2. Set up a workflow to run the script when code is merged.
D. Host each website by using AWS Amplify with a serverless backend. Conned the repository branches that correspond to each of the desired environments. Start deployments by merging code changes to a desired branch.

Answer: D

NEW QUESTION # 886
A developer uses AWS CloudFormation to deploy an Amazon API Gateway API and an AWS Step Functions state machine The state machine must reference the API Gateway API after the CloudFormation template is deployed The developer needs a solution that uses the state machine to reference the API Gateway endpoint.
Which solution will meet these requirements MOST cost-effectively?

A. Configure the CloudFormation template to store the API endpoint in a standard AWS: SecretsManager Secret resource Configure the state machine to reference the resource
B. Configure the CloudFormation template to store the API endpoint in an environment variable for the AWS::StepFunctions::StateMachine resourc Configure the state machine to reference the environment variable
C. Configure the CloudFormation template to reference the API endpoint in the DefinitionSubstitutions property for the AWS StepFunctions StateMachme resource.
D. Configure the CloudFormation template to store the API endpoint in a standard AWS::AppConfig;ConfigurationProfile resource Configure the state machine to reference the resource.

Answer: C

Explanation:
* CloudFormation and Dynamic References: The DefinitionSubstitutions property in CloudFormation allows you to pass values into Step Functions state machines at runtime.
* Cost-Effectiveness: This solution is cost-effective as it leverages CloudFormation's built-in capabilities, avoiding the need for additional services like Secrets Manager or AppConfig.

NEW QUESTION # 887
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