Free Amazon DVA-C02 Exam Questions

Become Amazon Certified with updated DVA-C02 exam questions and correct answers

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Total 550 Questions | Updated On: May 12, 2026

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Question 1

A developer updates an AWS Lambda function that is integrated with an Amazon API Gateway API. The APIserves as the backend for a web application. The developer must test the updated Lambda function withoutaffecting production users .Which solution will meet these requirements in the MOST operationally efficient way?

A : Create a canary deployment on the existing API stage and test by using the production URL.

B : Change the API endpoint type to private and test by using the production URL.

C : Create a new API Gateway stage for testing and use stage variables to route traffic to the updatedLambda function.

D : Deploy a separate CloudFormation stack that duplicates the production API and Lambda function.

Answer: C

Question 2

An application writes transactions to an Amazon DynamoDB table by using the PutItem operation. Eachtransaction has a unique transactionId. Sometimes duplicate transactions are received. The developer wants toensure that a duplicate PutItem does not overwrite an existing item. Duplicate transactions are rare.What is the MOST cost-effective solution?

A : Call GetItem before calling PutItem.

B : Enable TTL on the table.

C : Use a conditional put with attribute_exists(transactionId).

D : Use a conditional put with attribute_not_exists(transactionId).

Answer: D

Question 3

A developer has created an AWS Lambda function that makes queries to an Amazon Aurora MySQL DB instance. When the developer performs a test the OB instance shows an error for too many connections. Which solution will meet these requirements with the LEAST operational effort?

A : Create a read replica for the DB instance Query the replica DB instance instead of the primary DB instance.

B : Migrate the data lo an Amazon DynamoDB database.

C : Configure the Amazon Aurora MySQL DB instance tor Multi-AZ deployment.

D : Create a proxy in Amazon RDS Proxy Query the proxy instead of the DB instance.

Answer: D

Question 4

A company wants to use AWS AppConfig to gradually deploy a new feature to 15% of users to test the feature before a full deployment. Which solution will meet this requirement with the LEAST operational overhead?

A : Set up a custom script within the application to randomly select 15% of users. Assign a flag for the new feature to the selected users.

B : Create separate AWS AppConfig feature flags for both groups of users. Configure the flags to target 15% of users.

C : Create an AWS AppConfig feature flag. Define a variant for the new feature, and create a rule to target 15% of users.

D : Use AWS AppConfig to create a feature flag without variants. Implement a custom traffic splitting mechanism in the application code.

Answer: C

Question 5

A company has an AWS Step Functions state machine named myStateMachine. The company configured aservice role for Step Functions. The developer must ensure that only the myStateMachine state machine canassume the service role.

A : " Condition " : { " ArnLike " : { " aws " : " arn:aws:states:ap-south-1:111111111111:stateMachine " } }

B : " Condition " : { " ArnLike " : { " aws " : " arn:aws:states:ap-south-1:*:stateMachine " } }

Answer: A

Page: 1 / 110

Total 550 Questions | Updated On: May 12, 2026

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