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DVA-C02 practice test questions answers

Amazon Web Services DVA-C02 Exam Dumps - Actual Questions Answers

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  • Last Update: Nov 23, 2023
  • Questions: 149 questions with Expert Explanation
  • Single Choice: 135 Q&A's
  • Multiple Choice: 14 Q&A's
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DVA-C02 Questions and Answers

Question # 1

A company hosts a client-side web application for one of its subsidiaries on Amazon S3. The web application can be accessed through Amazon CloudFront from After a successful rollout, the company wants to host three more client-side web applications for its remaining subsidiaries on three separate S3 buckets.

To achieve this goal, a developer moves all the common JavaScript files and web fonts to a central S3 bucket that serves the web applications. However, during testing, the developer notices that the browser blocks the JavaScript files and web fonts.

What should the developer do to prevent the browser from blocking the JavaScript files and web fonts?


Create four access points that allow access to the central S3 bucket. Assign an access point to each web application bucket.


Create a bucket policy that allows access to the central S3 bucket. Attach the bucket policy to the central S3 bucket.


Create a cross-origin resource sharing (CORS) configuration that allows access to the central S3 bucket. Add the CORS configuration to the central S3 bucket.


Create a Content-MD5 header that provides a message integrity check for the central S3 bucket. Insert the Content-MD5 header for each web application request.

Question # 2

A developer has an application that makes batch requests directly to Amazon DynamoDB by using the BatchGetItem low-level API operation. The responses frequently return values in the UnprocessedKeys element.

Which actions should the developer take to increase the resiliency of the application when the batch response includes values in UnprocessedKeys? (Choose two.)


Retry the batch operation immediately.


Retry the batch operation with exponential backoff and randomized delay.


Update the application to use an AWS software development kit (AWS SDK) to make the requests.


Increase the provisioned read capacity of the DynamoDB tables that the operation accesses.


Increase the provisioned write capacity of the DynamoDB tables that the operation accesses.

Question # 3

An ecommerce company is using an AWS Lambda function behind Amazon API Gateway as its application tier. To process orders during checkout, the application calls a POST API from the frontend. The POST API invokes the Lambda function asynchronously. In rare situations, the application has not processed orders. The Lambda application logs show no errors or failures.

What should a developer do to solve this problem?


Inspect the frontend logs for API failures. Call the POST API manually by using the requests from the log file.


Create and inspect the Lambda dead-letter queue. Troubleshoot the failed functions. Reprocess the events.


Inspect the Lambda logs in Amazon CloudWatch for possible errors. Fix the errors.


Make sure that caching is disabled for the POST API in API Gateway.

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