100% Free Amazon DVA-C02 Practice Test Questions

Question 1

A developer is creating an application that uses an AWS Lambda function to transform and load data from an Amazon S3 bucket. When the developer tests the application, the developer finds that some invocations of the Lambda function are slower than others. The developer needs to update the Lambda function to have predictable invocation durations that run with low latency. Any initialization activities, such as loading libraries and instantiating clients, must run during allocation time rather than during actual function invocations. Which combination of steps will meet these requirements? (Select TWO.)

A : Create a schedule group in Amazon EventBridge Scheduler to invoke the Lambda function.

B : Configure provisioned concurrency for the Lambda function to have the necessary number of execution environments.

C : Use the SLATEST version of the Lambda function.

D : Configure reserved concurrency for the Lambda function to have the necessary number of execution environments.

E : Deploy changes, and publish a new version of the Lambda function.

Answer: B,D

Question 2

A developer is building a microservices-based application by using Python on AWS and several AWS services The developer must use AWS X-Ray The developer views the service map by using the console to view the service dependencies. During testing, the developer notices that some services are missing from the service map What can the developer do to ensure that all services appear in the X-Ray service map?

A : Modify the X-Ray Python agent configuration in each service to increase the sampling rate.

B : Instrument the application by using the X-Ray SDK for Python. Install the X-Ray SDK for all the services that the application uses.

C : Enable X-Ray data aggregation in Amazon CloudWatch Logs for all the services that the application uses.

D : Increase the X-Ray service map timeout value in the X-Ray console.

Answer: B

Question 3

A company has an application that is hosted on Amazon EC2 instances The application stores objects in an Amazon S3 bucket and allows users to download objects from the S3 bucket A developer turns on S3 Block Public Access for the S3 bucket After this change, users report errors when they attempt to download objects The developer needs to implement a solution so that only users who are signed in to the application can access objects in the S3 bucket. Which combination of steps will meet these requirements in the MOST secure way? (Select TWO.)

A : Create an EC2 instance profile and role with an appropriate policy Associate the role with the EC2 instances

B : Create an 1AM user with an appropriate policy. Store the access key ID and secret access key on the EC2 instances

C : Modify the application to use the S3 GeneratePresignedUrl API call

D : Modify the application to use the S3 GetObject API call and to return the object handle to the user

E : Modify the application to delegate requests to the S3 bucket.

Answer: A,C

Question 4

A company has a web application that is deployed on AWS. The application uses an Amazon API Gateway API and an AWS Lambda function as its backend.

The application recently demonstrated unexpected behavior. A developer examines the Lambda function code, finds an error, and modifies the code to resolve the problem. Before deploying the change to production, the developer needs to run tests to validate that the application operates properly.

The application has only a production environment available. The developer must create a new development environment to test the code changes. The developer must also prevent other developers from overwriting these changes during the test cycle.

Which combination of steps will meet these requirements with the LEAST development effort? (Choose two.)

A : Create a new resource in the current stage. Create a new method with Lambda proxy integration. Select the Lambda function. Add the hotfix alias. Redeploy the current stage. Test the backend.

B : Update the Lambda function in the API Gateway API integration request to use the hotfix alias. Deploy the API Gateway API to a new stage named hotfix. Test the backend.

C : Modify the Lambda function by fixing the code. Test the Lambda function. Create the alias hotfix. Point the alias to the $LATEST version.

D : Modify the Lambda function by fixing the code. Test the Lambda function. When the Lambda function is working as expected, publish the Lambda function as a new version. Create the alias hotfix. Point the alias to the new version.

E : Create a new API Gateway API for the development environment. Add a resource and method with Lambda integration. Choose the Lambda function and the hotfix alias. Deploy to a new stage. Test the backend.

Answer: B,D

Question 5

An application writes items to an Amazon DynamoDB table. As the application scales to thousands of instances, calls to the DynamoDB API generate occasional ThrottlingException errors. The application is coded in a language that is incompatible with the AWS SDK.

What can be done to prevent the errors from occurring?

A : Add exponential backoff to the application logic

B : Send the items to DynamoDB through Amazon Kinesis Data Firehose

C : Pass API calls through Amazon API Gateway

D : Use Amazon SQS as an API message bus

Answer: A

Free Practice Amazon DVA-C02 Exam Questions 2025