A mobile application requires users to sign in using their social media accounts (Google, Facebook). Once authenticated, the application needs to access an Amazon S3 bucket to upload user-specific photos. Which AWS service combination is MOST appropriate?

Answer options:

AWS IAM users for authentication and IAM roles for S3 access.

Amazon Cognito User Pools for authentication and Identity Pools for AWS credentials.

AWS SSO for authentication and S3 bucket policies for access.

Amazon API Gateway with Lambda authorizers.

How to approach this question

Look for 'social media sign-in' and 'access AWS resources'. This is the classic use case for Cognito User Pools + Identity Pools.

Full Answer

B.Amazon Cognito User Pools for authentication and Identity Pools for AWS credentials.✓ Correct

Amazon Cognito User Pools provide a user directory and social identity federation. Cognito Identity Pools take the authentication tokens and provide temporary, scoped AWS credentials to access services like S3.

Common mistakes

Confusing User Pools (authentication) with Identity Pools (authorization/AWS credentials).

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