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Amazon DVA-C01 Exam
AWS Certified Developer - Associate DVA-C02 (Page 5 )

Updated On: 26-Jan-2026
Page 5 of 113
PDF with 500 Questions

A developer updates an AWS Lambda function that an Amazon API Gateway API uses. The API is the backend for a web application.
The developer needs to test the updated Lambda function before deploying the Lambda function to production. The testing must not affect any production users of the web application.
Which solution will meet these requirements in the MOST operationally efficient way?

  1. Create a canary release deployment for the existing API stage. Deploy the API to the existing stage. Test the updated Lambda function by using the existing URL.
  2. Update the API Gateway API endpoint type to private. Deploy the changes to the existing API stage. Test the API by using the existing URL.
  3. Create a new test API stage in API Gateway. Add stage variables to deploy the updated Lambda function to only the test stage. Test the updated Lambda function by using the new stage URL.
  4. Create a new AWS CloudFormation stack to deploy a copy of the entire production API and Lambda function. Use the stack's API URL to test the updated Lambda function.

Answer(s): C



A developer is designing a fault-tolerant environment where client sessions will be saved.
How can the developer ensure that no sessions are lost if an Amazon EC2 instance fails?

  1. Use sticky sessions with an Elastic Load Balancer target group.
  2. Use Amazon SQS to save session data.
  3. Use Amazon DynamoDB to perform scalable session handling.
  4. Use Elastic Load Balancer connection draining to stop sending requests to failing instances.

Answer(s): C



A developer wrote an application that uses an AWS Lambda function to asynchronously generate short videos based on requests from customers. This video generation can take up to 10 minutes. After the video is generated, a URL to download the video is pushed to the customer's web browser. The customer should be able to access these videos for at least 3 hours after generation.
Which solution will meet these requirements?

  1. Store the video in the /tmp folder within the Lambda execution environment. Push a Lambda function URL to the customer.
  2. Store the video in an Amazon Elastic File System (Amazon EFS) file system attached to the function. Generate a pre-signed URL for the video object and push the URL to the customer.
  3. Store the video in Amazon S3. Generate a pre-signed URL for the video object and push the URL to the customer.
  4. Store the video in an Amazon CloudFront distribution. Generate a pre-signed URL for the video object and push the URL to the customer.

Answer(s): C



A developer is creating a web application for a school that stores data in Amazon DynamoDB. The ExamScores table has the following attributes: student_id, subject_name, and top_score.
Each item in the ExamScores table is identified with student_id as the partition key and subject_name as the sort key. The web application needs to display the student _id for the top scores for each school subject. The developer needs to increase the speed of the queries to retrieve the student_id for the top scorer for each school subject.
Which solution will meet these requirements?

  1. Create a local secondary index (LSI) with subject_name as the partition key and top_score as the sort key.
  2. Create a local secondary index (LSI) with top_score as the partition key and student_id as the sort key.
  3. Create a global secondary index (GSI) with subject_name as the partition key and top_score as the sort key.
  4. Create a global secondary index (GSI) with subject_name as the partition key and student_id as the sort key.

Answer(s): C



A developer manages an application that writes customer orders to an Amazon DynamoDB table. The orders use customer_id as the partition key, order_id as the sort key, and order_date as an attribute. A new access pattern requires accessing data by order_date and order_id. The developer needs to implement a new AWS Lambda function to support the new access pattern.
How should the developer support the new access pattern in the MOST operationally efficient way?

  1. Add a new local secondary index (LSI) to the DynamoDB table that specifies order_date as the partition key and order_id as the sort key. Write the new Lambda function to query the new LSI index.
  2. Write the new Lambda function to scan the DynamoDB table. In the Lambda function, write a method to retrieve and combine results by order_date and order_id.
  3. Add a new global secondary index (GSI) to the DynamoDB table that specifies order_date as the partition key and order_id as the sort key. Write the new Lambda function to query the new GSI index.
  4. Enable DynamoDB Streams on the table. Choose the new and old images information to write to the DynamoDB stream. Write the new Lambda function to query the DynamoDB stream

Answer(s): C



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