DVA-C02 · Question #707
DVA-C02 Question #707: Real Exam Question with Answer & Explanation
The correct answer is B: Configure the Lambda function as a PreSignUp trigger to check whether a user exists in the. Using the PreSignUp trigger allows the Lambda function to automatically confirm users during the sign-up process before the user is created, minimizing operational overhead and avoiding additional confirmation steps after sign-up.
Question
A developer is using a user pool in Amazon Cognito to implement user sign-up functionality for an application. The developer wants to use an AWS Lambda function to automatically confirm known users during the sign-up process. The Lambda function will check users against existing user data. Which solution will meet these requirements with the LEAST operational overhead?
Options
- AConfigure the Cognito user pool to invoke the Lambda function on the PostConfirmation event to
- BConfigure the Lambda function as a PreSignUp trigger to check whether a user exists in the
- CUse an AWS SDK in the Lambda function to confirm users by calling the AdminConfirmSignUp
- DImplement a custom authentication flow that uses Lambda functions to validate user information
Explanation
Using the PreSignUp trigger allows the Lambda function to automatically confirm users during the sign-up process before the user is created, minimizing operational overhead and avoiding additional confirmation steps after sign-up.
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