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Amazon DVA-C02 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Security	26%	- Secure application data 1. Manage secrets and credentials securely 2. Implement encryption at rest and in transit - Apply security best practices 1. Follow AWS Well-Architected Framework security principles 2. Validate application security configurations - Implement authentication and authorization 1. Use Amazon Cognito for identity management 2. Manage IAM roles, policies, and permissions
Topic 2: Troubleshooting and Optimization	18%	- Debug and resolve errors 1. Identify and fix code defects 2. Resolve integration and configuration problems - 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
Topic 3: Deployment	24%	- 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 - Prepare application artifacts for deployment 1. Use infrastructure as code (AWS CloudFormation, AWS SAM) 2. Package code and dependencies
Topic 4: Development with AWS Services	32%	- 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. Use AWS SDKs and APIs 2. Implement architectural patterns 3. Develop serverless applications - Interact with AWS data services 1. Work with Amazon DynamoDB, Amazon S3 2. Implement caching and data storage strategies

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Amazon AWS Certified Developer - Associate Sample Questions (Q429-Q434):

NEW QUESTION # 429
An ecommerce application is running behind an Application Load Balancer. A developer observes some unexpected load on the application during non-peak hours. The developer wants to analyze patterns for the client IP addresses that use the application.
Which HTTP header should the developer use for this analysis?

A. The X-Forwarded-For header
B. The X-Forwarded-Port header
C. The X-Forwarded-Host header
D. The X-Forwarded-Proto header

Answer: A

Explanation:
The X-Forwarded-For HTTP header contains the IP address of the original client that made the request. The developer can use this header to analyze patterns for the IP addresses of clients using the application.

NEW QUESTION # 430
An application ingests data from an Amazon Kinesis data stream. The shards in the data stream are set for normal traffic.
During tests for peak traffic, the application ingests data slowly. A developer needs to adjust the data stream to handle the peak traffic.
What should the developer do to meet this requirement MOST cost-effectively?

A. Install the Kinesis Producer Library {KPL) to ingest data into the data stream.
B. Increase the shard count in the data stream by using the UpdateShardCount API operation.
C. Switch to on-demand capacity mode for the data stream. Specify a partition key when writing data to the data stream.
D. Decrease the amount of time that data is kept in the data stream by using the DecreaseStreamRetention Period API operation.

Answer: B

NEW QUESTION # 431
A company has an analytics application that uses an AWS Lambda function to process transaction data asynchronously A developer notices that asynchronous invocations of the Lambda function sometimes fail When failed Lambda function invocations occur, the developer wants to invoke a second Lambda function to handle errors and log details.
Which solution will meet these requirements?

A. Configure a Lambda function destination with a failure condition Specify Lambda function as the destination type Specify the error-handling Lambda function's Amazon Resource Name (ARN) as the resource
B. Enable AWS X-Ray active tracing on the initial Lambda function. Configure X-Ray to capture stack traces of the failed invocations. Invoke the error-handling Lambda function by including the stack traces in the event object.
C. Create a status check alarm on the initial Lambda function. Configure the alarm to invoke the error-handling Lambda function when the alarm is initiated. Ensure that the alarm passes the stack trace in the event object.
D. Configure a Lambda function trigger with a failure condition Specify Lambda function as the destination type Specify the error-handling Lambda function's Amazon Resource Name (ARN) as the resource

Answer: A

Explanation:
Lambda Destinations on Failure: Allow routing asynchronous function invocations to specified resources (like another Lambda function) upon failure.
Error Handling: The error-handling Lambda receives details about the failure, enabling logging and custom actions.
Direct Integration: This solution leverages native Lambda functionality for a simpler implementation.

NEW QUESTION # 432
A company is concerned that a malicious user could deploy unauthorized changes to the code for an AWS Lambda function. What can a developer do to ensure that only trusted code is deployed to Lambda?

A. Turn on the trusted code option in AWS CodeDeploy. Add the CodeDeploy digital certificate to the Lambda package before deploying the package to Lambda.
B. Define the code signing configuration in the Lambda console. Use AWS Signer to digitally sign the Lambda package before deploying the package to Lambda.
C. Link Lambda to AWS KMS in the Lambda console. Use AWS KMS to digitally sign the Lambda package before deploying the package to Lambda.
D. Set the KmsKeyArn property of the Lambda function to the Amazon Resource Name (ARN) of a trusted key before deploying the package to Lambda.

Answer: B

NEW QUESTION # 433
A company is migrating its PostgreSQL database into the AWS Cloud. The company wants to use a database that will secure and regularly rotate database credentials. The company wants a solution that does not require additional programming overhead.
Which solution will meet these requirements?

A. Use Amazon Aurora PostgreSQL for the database. Store the database credentials in AWS Systems Manager Parameter Store. Turn on rotation.
B. Use Amazon DynamoDB for the database. Store the database credentials in AWS Systems Manager Parameter Store. Turn on rotation.
C. Use Amazon Aurora PostgreSQL for the database. Store the database credentials in AWS Secrets Manager. Turn on rotation.
D. Use Amazon DynamoDB for the database. Store the database credentials in AWS Secrets Manager. Turn on rotation.

Answer: C

Explanation:
Using a database that secures and regularly changes database credentials: Amazon Aurora PostgreSQL offers built-in credential rotation, which allows you to change database credentials at regular intervals.
Solution that requires no additional programming overhead: Amazon Aurora PostgreSQL credential rotation is fully automated, so it requires no additional programming overhead.

NEW QUESTION # 434
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