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Amazon DVA-C02 Exam Syllabus Topics:

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

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Certification DVA-C02 Questions | DVA-C02 Examinations Actual Questions

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Amazon AWS Certified Developer - Associate Sample Questions (Q433-Q438):

NEW QUESTION # 433
A video game company has a platform that provides 20 video games to users around the world.
The company's development team uses an Amazon DynamoDB table as the database to store user information for the platform. The table uses an attribute named GameTitle as the partition key and an attribute named UserId as the sort key.
The development team notices that requests to the table are being throttled. The development team receives ProvisionedThroughputExceededException errors.
The development team must resolve the throttling issue.
Which solution will meet this requirement?

A. Create a DynamoDB Accelerator cluster to respond to all write operations on the database.
B. Recreate the DynamoDB table. Set UserId as the partition key and GameTitle as the sort key.
C. Create a local secondary index. Set UserId as the partition key and GameTitle as the sort key.
D. Set the DynamoDB table to provisioned capacity mode Specify 50 read capacity units (RCUs) and 25 write capacity units (WCUs).

Answer: B

Explanation:
The throttling is likely caused by hot partitions, meaning that the GameTitle attribute (as the partition key) is receiving a disproportionate amount of traffic-especially if a few games are more popular. By switching the partition key to UserId, the workload is more evenly distributed across partitions, since UserId is more likely to be unique and diverse, reducing throttling and improving performance.

NEW QUESTION # 434
A company needs to set up secure database credentials for all its AWS Cloud resources. The company's resources include Amazon RDS DB instances, Amazon DocumentDB clusters, and Amazon Aurora DB instances. The company's security policy mandates that database credentials be encrypted at rest and rotated at a regular interval.
Which solution will meet these requirements MOST securely?

A. Store the database access credentials as an encrypted Amazon S3 object in an S3 bucket. Block all public access on the S3 bucket. Use S3 server-side encryption to set up automatic rotation on the encryption key.
B. Create an AWS Lambda function by using the SecretsManagerRotationTemplate template in the AWS Secrets Manager console. Create secrets for the database credentials in Secrets Manager.Set up secrets rotation on a schedule.
C. Set up IAM database authentication for token-based access. Generate user tokens to provide centralized access to RDS DB instances, Amazon DocumentDB clusters, and Aurora DB instances.
D. Create parameters for the database credentials in AWS Systems Manager Parameter Store. Set the Type parameter to SecureString. Set up automatic rotation on the parameters.

Answer: B

NEW QUESTION # 435
A developer is creating a serverless application that uses an AWS Lambda function The developer will use AWS CloudFormation to deploy the application The application will write logs to Amazon CloudWatch Logs The developer has created a log group in a CloudFormation template for the application to use The developer needs to modify the CloudFormation template to make the name of the log group available to the application at runtime Which solution will meet this requirement?

A. Use the CloudFormation template's Mappings section to specify the log group's name for the application.
B. Pass the log group's name to the application in the user data section of the CloudFormation template.
C. Pass the log group's Amazon Resource Name (ARN) as an environment variable to the Lambda function
D. Use the AWS:lnclude transform in CloudFormation to provide the log group's name to the application

Answer: C

Explanation:
* CloudFormation and Lambda Environment Variables:
* CloudFormation is an excellent tool to manage infrastructure as code, including the log group resource.
* Lambda functions can access environment variables at runtime, making them a suitable way to pass configuration information like the log group ARN.
* CloudFormation Template Modification:
* In your CloudFormation template, define the log group resource.
* In the Lambda function resource, add an Environment section:
YAML
Environment:
Variables:
LOG_GROUP_ARN:!RefLogGroupResourceName
Use code with caution.
content_copy
* The !Ref intrinsic function retrieves the log group's ARN, which CloudFormation generates during stack creation.
* Using the ARN in Your Lambda Function:
* Within your Lambda code, access the LOG_GROUP_ARN environment variable.
* Configure your logging library (e.g., Python's logging module) to send logs to the specified log group.

NEW QUESTION # 436
A company creates a containerized application for its customers. The company will host the container images in Amazon ECR. The customers need to be able to find the images on their own. A developer must ensure that only the company can modify the published container images.
Which combination of actions should the developer take to meet these requirements? (Choose two.)

A. Create a new private ECR repository and registry. Configure an IAM role that can write to the new ECR repository.
B. Create a resource policy that allows only specific accounts to add and edit images in the ECR repository.
C. Create a resource policy that allows all accounts to add and edit images in the ECR repository.
D. Create a new public ECR repository and registry. Configure an IAM role that can write to the new ECR repository.
E. Create a new private ECR repository and registry. Configure Amazon Cognito to grant permissions to write images to the new ECR repository.

Answer: B,D

Explanation:
Create a public ECR repository so that customers can discover and pull the images without needing AWS credentials.
Apply an ECR resource policy that explicitly allows only your company's principals to perform push (PutImage) and mutation actions on the repository. This ensures that while anyone can list and pull images (since it's public), only your account (or IAM roles you specify) can modify the images.

NEW QUESTION # 437
A developer is responsible for three AWS Lambda functions that run in the same AWS account.
The functions are named Lambda A, Lambda B, and Lambda C. The AWS account has a concurrent executions quota of 1,000.
Lambda A needs to use up to 80% of the concurrent execution quota to support business operations. However, the developer notices that Lambda B and Lambda C occasionally use more than 20% of the concurrent execution quota. High load from Lambda B and Lambda C causes throttling errors for Lambda A.
The developer must ensure that Lambda A never experiences throttling errors. Throttling issues for Lambda B and Lambda C are tolerable. However, Lambda B and Lambda C must handle as much traffic as possible.
Which solution will meet these requirements?

A. Configure the provisioned concurrency for Lambda Band Lambda C to be 100 each.
B. Configure an Amazon CloudWatch alarm based on the Throttles metric for Lambda A. Configure a new Lambda function to set the provisioned concurrency for Lambda B and Lambda C to 0 when the metric for Lambda A has a value greater than 0.
C. Configure an Amazon CloudWatch alarm based on the Throttles metric for Lambda A. Configure a new Lambda function to set the reserved concurrency for Lambda B and Lambda C to 0 when the metric for Lambda A has a value greater than 0.
D. Configure the reserved concurrency for Lambda Band Lambda C to be 100 each.

Answer: D

Explanation:
Set reserved concurrency of 100 for Lambda B and Lambda C to cap their usage and reserve
200 capacity, leaving 800 (80%) guaranteed for Lambda A; this prevents A's throttling while allowing B and C to process up to their limits.

NEW QUESTION # 438
......

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