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The Amazon DVA-C02 (AWS Certified Developer – Associate) certification exam is designed for individuals who want to demonstrate their expertise in developing and maintaining applications on the Amazon Web Services (AWS) platform. The exam is intended for developers with at least one year of experience in designing, developing, and deploying cloud-based solutions using AWS technologies.

Amazon AWS Certified Developer – Associate Sample Questions (Q28-Q33):

NEW QUESTION # 28
A company is using an AWS Lambda function to process records from an Amazon Kinesis data stream. The company recently observed slow processing of the records. A developer notices that the iterator age metric for the function is increasing and that the Lambda run duration is constantly above normal.
Which actions should the developer take to increase the processing speed? (Choose two.)

  • A. Increase the number of shards of the Kinesis data stream.
  • B. Increase the timeout of the Lambda function.
  • C. Increase the memory that is allocated to the Lambda function.
  • D. Decrease the timeout of the Lambda function.
  • E. Decrease the number of shards of the Kinesis data stream.

Answer: A,C

NEW QUESTION # 29
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.)

  • A. Update the application to use an AWS software development kit (AWS SDK) to make the requests.
  • B. Increase the provisioned read capacity of the DynamoDB tables that the operation accesses.
  • C. Retry the batch operation immediately.
  • D. Retry the batch operation with exponential backoff and randomized delay.
  • E. Increase the provisioned write capacity of the DynamoDB tables that the operation accesses.

Answer: B,D

NEW QUESTION # 30
A developer is creating an application that will give users the ability to store photos from their cellphones in the cloud. The application needs to support tens of thousands of users. The application uses an Amazon API Gateway REST API that is integrated with AWS Lambda functions to process the photos. The application stores details about the photos in Amazon DynamoDB.
Users need to create an account to access the application. In the application, users must be able to upload photos and retrieve previously uploaded photos. The photos will range in size from 300 KB to 5 MB.
Which solution will meet these requirements with the LEAST operational overhead?

  • A. Use Amazon Cognito user pools to manage user accounts. Create an Amazon Cognito user pool authorizer in API Gateway to control access to the API. Use the Lambda function to store the photos in Amazon S3. Store the object’s S3 key as part of the photo details in the DynamoDB table. Retrieve previously uploaded photos by querying DynamoDB for the S3 key.
  • B. Create an IAM user for each user of the application during the sign-up process. Use IAM authentication to access the API Gateway API. Use the Lambda function to store the photos in Amazon S3. Store the object’s S3 key as part of the photo details in the DynamoDB table. Retrieve previously uploaded photos by querying DynamoDB for the S3 key.
  • C. Create a users table in DynamoDB. Use the table to manage user accounts. Create a Lambda authorizer that validates user credentials against the users table. Integrate the Lambda authorizer with API Gateway to control access to the API. Use the Lambda function to store the photos in Amazon S3. Store the object’s S3 key as par of the photo details in the DynamoDB table. Retrieve previously uploaded photos by querying DynamoDB for the S3 key.
  • D. Use Amazon Cognito user pools to manage user accounts. Create an Amazon Cognito user pool authorizer in API Gateway to control access to the API. Use the Lambda function to store the photos and details in the DynamoDB table. Retrieve previously uploaded photos directly from the DynamoDB table.

Answer: A

NEW QUESTION # 31
A company receives food orders from multiple partners. The company has a microservices application that uses Amazon API Gateway APIs with AWS Lambda integration. Each partner sends orders by calling a customized API that is exposed through API Gateway. The API call invokes a shared Lambda function to process the orders.
Partners need to be notified after the Lambda function processes the orders. Each partner must receive updates for only the partner’s own orders. The company wants to add new partners in the future with the fewest code changes possible.
Which solution will meet these requirements in the MOST scalable way?

  • A. Create a different Amazon Simple Notification Service (Amazon SNS) topic for each partner. Configure the Lambda function to publish messages for each partner to the partner’s SNS topic.
  • B. Create an Amazon Simple Notification Service (Amazon SNS) topic. Configure the Lambda function to publish messages with specific attributes to the SNS topic. Subscribe each partner to the SNS topic. Apply the appropriate filter policy to the topic subscriptions.
  • C. Create a different Lambda function for each partner. Configure the Lambda function to notify each partner’s service endpoint directly.
  • D. Create one Amazon Simple Notification Service (Amazon SNS) topic. Subscribe all partners to the SNS topic.

Answer: B

NEW QUESTION # 32
A developer is deploying an AWS Lambda function The developer wants the ability to return to older versions of the function quickly and seamlessly.
How can the developer achieve this goal with the LEAST operational overhead?

  • A. Use a function alias with different versions.
  • B. Use AWS OpsWorks to perform blue/green deployments.
  • C. Use AWS CodePipeline for deployments and rollbacks.
  • D. Maintain deployment packages for older versions in Amazon S3.

Answer: A

NEW QUESTION # 33
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