Latest DVA-C02 Exam Answers & Customized DVA-C02 Lab Simulation

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The Best Latest DVA-C02 Exam Answers | Professional Customized DVA-C02 Lab Simulation: AWS Certified Developer - Associate

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Amazon AWS Certified Developer - Associate Sample Questions (Q252-Q257):

NEW QUESTION # 252
A developer has an application that asynchronously invokes an AWS Lambda function. The developer wants to store messages that resulted in failed invocations of the Lambda function so that the application can retry the call later.
What should the developer do to accomplish this goal with the LEAST operational overhead?

A. Set up Amazon CloudWatch Logs log groups to filter and store the messages in an Amazon S3 bucket. Import the messages in Lambda. Run the Lambda function again.
B. Send Amazon EventBridge events to an Amazon Simple Queue Service (Amazon SQS) queue.Configure the Lambda function to pull messages from the SQS queue. Run the Lambda function again.
C. Implement a dead-letter queue for discarded messages. Set the dead-letter queue as an event source for the Lambda function.
D. Configure Amazon EventBridge to send the messages to Amazon Simple Notification Service (Amazon SNS) to initiate the Lambda function again.

Answer: C

Explanation:
https://docs.aws.amazon.com/lambda/latest/dg/invocation-async.html#invocation-dlq

NEW QUESTION # 253
A company runs a batch processing application by using AWS Lambda functions and Amazon API Gateway APIs with deployment stages for development, user acceptance testing and production A development team needs to configure the APIs in the deployment stages to connect to third-party service endpoints.
Which solution will meet this requirement?

A. Store the third-party service endpoint for each environment in AWS AppConfig
B. Store the third-party service endpoints in API Gateway stage variables that correspond to the stage
C. Store the third-party service endpoints in Lambda layers that correspond to the stage
D. Encode the third-party service endpoints as query parameters in the API Gateway request URL.

Answer: B

Explanation:
API Gateway Stage Variables: These are designed for configuring dynamic values for your APIs in different deployment stages (dev, test, prod). Here's how to use them for third-party endpoints:
In the API Gateway console, access the "Stages" section of your API.
For each stage, create a stage variable named something like thirdPartyEndpoint.
Set the value of this variable to the actual endpoint URL for that specific environment.
When configuring API requests within your API Gateway method, reference this endpoint using ${stageVariables.thirdPartyEndpoint}.
Why Stage Variables Excel Here:
Environment Isolation: This approach keeps the endpoint configuration specific to each deployment stage, ensuring the right endpoints are used during development, testing, and production cycles.
Ease of Management: You manage the endpoints directly through the API Gateway console without additional infrastructure.
Reference:
Amazon API Gateway Stage Variables: https://docs.aws.amazon.com/apigateway/latest/developerguide/stage-variables.html

NEW QUESTION # 254
A developer is testing an application that invokes an AWS Lambda function asynchronously. During the testing phase the Lambda function fails to process after two retries.
How can the developer troubleshoot the failure?

A. Configure Amazon Simple Workflow Service to process any direct unprocessed events.
B. Configure Dead Letter Queues by sending events to Amazon SQS for investigation.
C. Configure AWS Config to process any direct unprocessed events.
D. Configure AWS CloudTrail logging to investigate the invocation failures.

Answer: B

Explanation:
Explanation
This solution allows the developer to troubleshoot the failure by capturing unprocessed events in a queue for further analysis. Dead Letter Queues (DLQs) are queues that store messages that could not be processed by a service, such as Lambda, for various reasons, such as configuration errors, throttling limits, or permissions issues. The developer can configure DLQs for Lambda functions by sending events to either an Amazon Simple Queue Service (SQS) queue or an Amazon Simple Notification Service (SNS) topic. The developer can then inspect the messages in the queue or topic to identify and fix the root cause of the failure.
Configuring AWS CloudTrail logging will not capture invocation failures for asynchronous Lambda invocations, but only record API calls made by or on behalf of Lambda. Configuring Amazon Simple Workflow Service (SWF) or AWS Config will not process any direct unprocessed events, but require additional integration and configuration.

NEW QUESTION # 255
A company has multiple Amazon VPC endpoints in the same VPC. A developer needs configure an Amazon S3 bucket policy so users can access an S3 bucket only by using these VPC endpoints.
Which solution will meet these requirements?

A. Create multiple S3 bucket polices by using each VPC endpoint ID that have the aws SourceVpce value in the StringNotEquals condition.
B. Create a single S3 bucket policy that has multiple aws sourceVpce value in the StingNotEquale condition. Repeat for all the VPC endpoint IDs.
C. Create a single S3 bucket policy that the multiple aws SourceVpce value and in the SringNotEquals condton to use vpce.
D. Create a single S3 bucket policy that has the aws SourceVpc value and in the StingNotEquals condition to use VPC ID.

Answer: B

Explanation:
This solution will meet the requirements by creating a single S3 bucket policy that denies access to the S3 bucket unless the request comes from one of the specified VPC endpoints. The aws:SourceVpce condition key is used to match the ID of the VPC endpoint that is used to access the S3 bucket. The StringNotEquals condition operator is used to negate the condition, so that only requests from the listed VPC endpoints are allowed. Option A is not optimal because it will create multiple S3 bucket policies, which is not possible as only one bucket policy can be attached to an S3 bucket. Option B is not optimal because it will use the aws:SourceVpc condition key, which matches the ID of the VPC that is used to access the S3 bucket, not the VPC endpoint. Option C is not optimal because it will use the StringNotEquals condition operator with a single value, which will deny access to the S3 bucket from all VPC endpoints except one.

NEW QUESTION # 256
A developer is writing unit tests tor a new application that will be deployed on AWS. The developer wants to validate all pull requests with unit tests and merge the code with the main branch only when all tests pass The developer stores the code in AWS CodeCommit and sets up AWS CodeBuild to run the unit tests. The developer creates an AWS Lambda function to start the CodeBuild task. The developer needs to identify the CodeCommit events in an Amazon EventBridge event that can invoke the Lambda function when a pull request is created or updated.
Which CodeCommit event will meet these requirements?

A. Option C
B. Option D
C. Option B
D. Option A

Answer: A

Explanation:
https://aws.amazon.com/blogs/devops/automated-code-review-on-pull-requests-using-aws-codecommit-and- aws-codebuild/

NEW QUESTION # 257
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LATEST DVA-C02 EXAM ANSWERS & CUSTOMIZED DVA-C02 LAB SIMULATION

Latest DVA-C02 Exam Answers & Customized DVA-C02 Lab Simulation