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Amazon DVA-C01 Online Practice Questions and Exam Preparation

DVA-C01 Exam Details

  • Exam Code
    :DVA-C01
  • Exam Name
    :AWS Certified Developer - Associate (DVA-C01)
  • Certification
    :Amazon Certifications
  • Vendor
    :Amazon
  • Total Questions
    :613 Q&As
  • Last Updated
    :Oct 01, 2025

Amazon DVA-C01 Online Questions & Answers

  • Question 541:

    In DynamoDB, what type of HTTP response codes indicate that a problem was found with the client request sent to the service?

    A. 5xx HTTP response code

    B. 200 HTTP response code

    C. 306 HTTP response code

    D. 4xx HTTP response code

  • Question 542:

    The Lambda function below is being called through an API using Amazon API Gateway. The average execution time for the Lambda function is about 1 second. The pseudocode for the Lambda function is as shown in the exhibit.

    What two actions can be taken to improve the performance of this Lambda function without increasing the cost of the solution? (Select two.)

    A. Package only the modules the Lambda function requires

    B. Use Amazon DynamoDB instead of Amazon RDS

    C. Move the initialization of the variable Amazon RDS connection outside of the handler function

    D. Implement custom database connection pooling with the Lambda function

    E. Implement local caching of Amazon RDS data so Lambda can re-use the cache

  • Question 543:

    A Developer is building a web application that uses Amazon API Gateway to expose an AWS Lambda function to process requests from clients. During testing, the Developer notices that the API Gateway times out even though the Lambda function finishes under the set time limit.

    Which of the following API Gateway metrics in Amazon CloudWatch can help the Developer troubleshoot the issue? (Choose two.)

    A. CacheHitCount

    B. IntegrationLatency

    C. CacheMissCount

    D. Latency

    E. Count

  • Question 544:

    An application needs to use the IP address of the client in its processing. The application has been moved into AWS and has been placed behind an Application Load Balancer (ALB). However, all the client IP addresses now appear to be the same. The application must maintain the ability to scale horizontally.

    Based on this scenario, what is the MOST cost-effective solution to this problem?

    A. Remove the application from the ALB. Delete the ALB and change Amazon Route 53 to direct traffic to the instance running the application.

    B. Remove the application from the ALB. Create a Classic Load Balancer in its place. Direct traffic to the application using the HTTP protocol.

    C. Alter the application code to inspect the X-Forwarded-For header. Ensure that the code can work properly if a list of IP addresses is passed in the header.

    D. Alter the application code to inspect a custom header. Alter the client code to pass the IP address in the custom header.

  • Question 545:

    Which of the following platforms are supported by Elastic Beanstalk? Choose 2 answers

    A. Apache Tomcat

    B. .NET

    C. IBM Websphere

    D. Oracle JBoss

    E. Jetty

  • Question 546:

    How should custom libraries be utilized in AWS Lambda?

    A. Host the library on Amazon S3 and reference to it from the Lambda function.

    B. Install the library locally and upload a ZIP file of the Lambda function.

    C. Import the necessary Lambda blueprint when creating the function.

    D. Modify the function runtime to include the necessary library.

  • Question 547:

    An organization is storing large files in Amazon S3, and is writing a web application to display meta-data about the files to end-users. Based on the metadata a user selects an object to download. The organization needs a mechanism to index the files and provide single-digit millisecond latency retrieval for the metadata.

    What AWS service should be used to accomplish this?

    A. Amazon DynamoDB

    B. Amazon EC2

    C. AWS Lambda

    D. Amazon RDS

  • Question 548:

    A company runs an e-commerce website that uses Amazon DynamoDB where pricing for items is dynamically updated in real time. At any given time, multiple updates may occur simultaneously for pricing information on a particular product. This is causing the original editor's changes to be overwritten without a proper review process.

    Which DynamoDB write option should be selected to prevent this overwriting?

    A. Concurrent writes

    B. Conditional writes

    C. Atomic writes

    D. Batch writes

  • Question 549:

    You run an ad-supported photo sharing website using S3 to serve photos to visitors of your site. At some point you find out that other sites have been linking to the photos on your site, causing loss to your business. What is an effective method to mitigate this?

    A. Store photos on an EBS volume of the web server

    B. Remove public read access and use signed URLs with expiry dates.

    C. Use CloudFront distributions for static content.

    D. Block the IPs of the offending websites in Security Groups.

  • Question 550:

    A Developer is writing a serverless application that requires that an AWS Lambda function be invoked every 10 minutes. What is an automated and serverless way to trigger the function?

    A. Deploy an Amazon EC2 instance based on Linux, and edit its /etc/crontab file by adding a command to periodically invoke the Lambda function.

    B. Configure an environment variable named PERIOD for the Lambda function. Set the value to 600.

    C. Create an Amazon CloudWatch Events rule that triggers on a regular schedule to invoke the Lambda function.

    D. Create an Amazon SNS topic that has a subscription to the Lambda function with a 600-second timer.

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