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Amazon DVA-C02 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Troubleshooting and Optimization	18%	- Debug and resolve errors 1. Identify and fix code defects 2. Resolve integration and configuration problems - Troubleshoot application issues 1. Analyze logs, metrics, and traces 2. Use Amazon CloudWatch, AWS X-Ray for monitoring - Optimize application performance 1. Improve latency and throughput 2. Optimize resource usage and costs
Topic 2: Deployment	24%	- Prepare application artifacts for deployment 1. Package code and dependencies 2. Use infrastructure as code (AWS CloudFormation, AWS SAM) - Implement CI/CD pipelines 1. Automate deployment and testing workflows 2. Use AWS CodePipeline, CodeBuild, CodeDeploy - Deploy applications on AWS 1. Perform safe updates and rollbacks 2. Deploy to AWS Lambda, Amazon EC2, Elastic Beanstalk
Topic 3: 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 - Write code for applications hosted on AWS 1. Use AWS SDKs and APIs 2. Implement architectural patterns 3. Develop serverless applications - Interact with AWS data services 1. Implement caching and data storage strategies 2. Work with Amazon DynamoDB, Amazon S3
Topic 4: 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. Validate application security configurations 2. Follow AWS Well-Architected Framework security principles

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Amazon AWS Certified Developer - Associate Sample Questions (Q355-Q360):

NEW QUESTION # 355
A developer owns and supports an application that has database credentials stored in environment variables for AWS Lambda functions. The developer needs an alternate storage method for the credentials instead of using plaintext environment variables. Which solution will handle the credentials MOST securely?

A. Store the database credentials as a string-type parameter in AWS Systems Manager Parameter Store.
Set the parameter ' s Amazon Resource Name (ARN) as the value of an environment variable. Use the AWS Parameters and Secrets Lambda Extension to retrieve the credentials in the Lambda function.
B. Use AWS CloudFormation to deploy the application. Ensure that the NoEcho property is set to true for the parameters that contain the database credentials.
C. Store the database credentials as a secret in AWS Secrets Manager. Set the secret ' s Amazon Resource Name (ARN) as the value of an environment variable. Use the AWS Parameters and Secrets Lambda Extension to retrieve the credentials in the Lambda function.
D. Use base64 encoding for the database credentials. Include the database credentials in the Lambda function ' s source code as part of a build process. Update the Lambda function ' s code to decode the credentials before the credentials are used.

Answer: C

Explanation:
The most secure solution is A because AWS Secrets Manager is purpose-built for storing, retrieving, and managing secrets such as database credentials, API keys, and tokens. In AWS guidance, Secrets Manager is recommended when applications need secure secret storage with controlled access, encryption, and integration with runtime retrieval patterns. By storing the credentials as a secret and passing only the secret ARN through an environment variable, the Lambda function avoids exposing the actual username and password in plaintext configuration.
The AWS Parameters and Secrets Lambda Extension is specifically designed to let Lambda functions retrieve secrets securely at invocation time. This reduces the risk of accidental exposure in code, deployment artifacts, or function configuration. Secrets Manager also supports automatic rotation , which is a major security advantage for database credentials and is one of the main reasons AWS recommends it over hardcoded or manually managed values.
Option B is incorrect because base64 is only encoding, not encryption, and embedding credentials in source code is insecure. Option C is less appropriate because a string type parameter in Systems Manager Parameter Store is not the secure choice for sensitive credentials; secure storage there would require SecureString , but even then Secrets Manager is the stronger AWS-recommended service for database secrets. Option D only masks values in CloudFormation outputs and logs with NoEcho ; it does not provide secure runtime secret retrieval or secret lifecycle management.
Therefore, A is the best and most secure answer according to AWS security best practices for Lambda applications handling database credentials.

NEW QUESTION # 356
A company runs an AWS CodeBuild project on medium-sized Amazon EC2 instances. The company wants to cost optimize the project and reduce the provisioning time.
Which solution will meet these requirements?

A. Configure the project to run on a CodeBuild on-demand fleet.
B. Set up Amazon S3 caching for the CodeBuild project.
C. Configure the project to run on a CodeBuild reserved capacity fleet.
D. Select AWS Lambda as the compute mode for the CodeBuild project.

Answer: B

Explanation:
CodeBuild supports S3 caching to store intermediate build artifacts and dependencies. This reduces the time required to download dependencies during subsequent builds, effectively lowering costs and improving build performance.
By using S3 caching, developers can optimize costs without changing the compute type or adding complexity.

NEW QUESTION # 357
A developer needs to build a solution in which an AWS Lambda function processes notifications from an Amazon SQS queue. Notifications for each user must be processed in the order that the notifications arrive in the queue. Notifications for different users can be processed in parallel.
Which solution will meet these requirements?

A. Create a single FIFO queue. Set the FIFO queue as the event source for the Lambda function.When a notification is added to the queue, set the MessageGroupId to be the ID of the appropriate user.
B. Create a standard queue for each user. Set each standard queue as an event source for the Lambda function. Add notifications to the appropriate queue for each user.
C. Create a single FIFO queue. Set the FIFO queue as the event source for the Lambda function.
Set the maximum concurrency of the function to the number of users. Add all notifications to the queue.
D. Create a single standard queue. Set the standard queue as the event source for the Lambda function. When a notification is added to the queue, set the MessageGroupId to be the ID of the appropriate user.

Answer: A

Explanation:
A FIFO queue preserves the order of messages within a MessageGroupId, allowing ordered processing per user. By setting the MessageGroupId to the user ID, the Lambda function processes messages for each user in order while still allowing parallel processing across different users.

NEW QUESTION # 358
A company has built an AWS Lambda function to convert large image files into output files that can be used in a third-party viewer application The company recently added a new module to the function to improve the output of the generated files However, the new module has increased the bundle size and has increased the time that is needed to deploy changes to the function code.
How can a developer increase the speed of the Lambda function deployment?

A. Use Amazon S3 to host the function dependencies
B. Use AWS CodeDeploy to deploy the function code
C. Increase the memory size of the function.
D. Use Lambda layers to package and load dependencies.

Answer: D

Explanation:
* Problem:Large bundle size increases Lambda deployment time.
* Lambda Layers:Layers let you package dependencies separately from your function code. This optimizes the deployment package, making updates faster.
* Modularization:Breaking down dependencies into layers improves code organization and reusability.

NEW QUESTION # 359
A developer wants to reduce risk when deploying a new version of an existing AWS Lambda function. To test the Lambda function, the developer needs to split the traffic between the existing version and the new version of the Lambda function.
Which solution will meet these requirements?

A. Create a function alias. Configure the alias to split the traffic between the two versions of the Lambda function.
B. Create the new version of the Lambda function as a Lambda layer on the existing version.Configure the function to split the traffic between the two layers.
C. Configure a weighted routing policy in Amazon Route 53. Associate the versions of the Lambda function with the weighted routing policy.
D. Create an Application Load Balancer (ALB) that uses the Lambda function as a target. Configure the ALB to split the traffic between the two versions of the Lambda function.

Answer: A

NEW QUESTION # 360
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