A company runs an application on AWS The application uses an AWS Lambda function that is configured with an Amazon Simple Queue Service (Amazon SQS) queue called high priority queue as the event source A developer is updating the Lambda function with another SQS queue called low priority queue as the event source The Lambda function must always read up to 10 simultaneous messages from the high priority queue before processing messages from low priority queue. The Lambda function must be limited to 100 simultaneous invocations.
Which solution will meet these requirements'?

• A.Set the event source mapping batch size to 10 for the high priority queue and to 90 for the low priority queue
• B.Set the delivery delay to 0 seconds for the high priority queue and to 10 seconds for the low priority queue
• C.Set the event source mapping maximum concurrency to 10 for the high priority queue and to 90 for the low priority queue
• D.Set the event source mapping batch window to 10 for the high priority queue and to 90 for the low priority queue

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A developer is creating a mobile application that will not require users to log in.
What is the MOST efficient method to grant users access to AWS resources'?

• A.Use an identity provider to securely authenticate with the application.
• B.Create an AWS Lambda function to create an 1AM user when a user accesses the application.
• C.Create credentials using AWS KMS and apply these credentials to users when using the application.
• D.Use Amazon Cognito to associate unauthenticated users with an IAM role that has limited access to resources.

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A developer is testing an application that invokes an AWS Lambda function asynchronously. During the testing phase the Lambda function fails to process after two retries.
How can the developer troubleshoot the failure?

• A.Configure AWS CloudTrail logging to investigate the invocation failures.
• B.Configure Dead Letter Queues by sending events to Amazon SQS for investigation.
• C.Configure Amazon Simple Workflow Service to process any direct unprocessed events.
• D.Configure AWS Config to process any direct unprocessed events.

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A software company is launching a multimedia application. The application will allow guest users to access sample content before the users decide if they want to create an account to gain full access. The company wants to implement an authentication process that can identify users who have already created an account. The company also needs to keep track of the number of guest users who eventually create an account.
Which combination of steps will meet these requirements? {Select TWO.)

• A.Create an Amazon Cognito identity pool. Configure the identity pool to allow unauthenticated users. Exchange unique identity for temporary credentials that allow all users to assume a role.
• B.Create an Amazon CloudFront distribution. Configure the distribution to allow unauthenticated users. Exchange user tokens for temporary credentials that allow all users to assume a role.
• C.Create a role for authenticated users that allows access to all content. Create a role for unauthenticated users that allows access to only the sample content.
• D.Allow all users to access the sample content by default. Create a role for authenticated users that allows access to the other content.
• E.Create an Amazon Cognito user pool. Configure the user pool to allow unauthenticated users. Exchange user tokens for temporary credentials that allow authenticated users to assume a role.

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A company built a new application in the AWS Cloud. The company automated the bootstrapping of new resources with an Auto Scaling group by using AWS Cloudf-ormation templates. The bootstrap scripts contain sensitive data.
The company needs a solution that is integrated with CloudFormation to manage the sensitive data in the bootstrap scripts.
Which solution will meet these requirements in the MOST secure way?

• A.Put the sensitive data into a CloudFormation parameter. Encrypt the CloudFormation templates by using an AWS Key Management Service (AWS KMS) key.
• B.Put the sensitive data into an Amazon S3 bucket Update the CloudFormation templates to download the object from Amazon S3 during bootslrap.
• C.Put the sensitive data into AWS Systems Manager Parameter Store as a secure string parameter. Update the CloudFormation templates to use dynamic references to specify template values.
• D.Put the sensitive data into Amazon Elastic File System (Amazon EPS) Enforce EFS encryption after file system creation. Update the CloudFormation templates to retrieve data from Amazon EFS.

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