An application uses an Amazon SQS queue and two AWS Lambda functions.

Attach an IAM policy to the SQS queue that grants the Lambda function principals read and write access. Attach an IAM policy to the execution role of each Lambda function that denies all access to the SQS queue except for the principal of each function.

Attach a resource-based policy to the SQS queue to deny read and write access to the queue for any entity except the principal of each Lambda function. Attach an IAM policy to the execution role of each Lambda function that allows read and write access to the queue.

Attach a resource-based policy to the SQS queue that grants the Lambda function principals read and write access to the queue. Attach an IAM policy to the execution role of each Lambda function that allows read and write access to the queue.

Attach a resource-based policy to the SQS queue to deny all access to the queue. Attach an IAM policy to the execution role of each Lambda function that grants read and write access to the queue.