Where can you attach a resource-based policy for cross-account access?

You can attach a resource-based policy directly to the resource in the other AWS account . E.g.; S3 bucket, SNS topic, or DynamoDB.
This policy grants your Lambda function permission to access the resource from another account.

Can you use AWS Organizations to simplify cross-account access?

Yes, AWS Organizations simplifies cross-account access.

Scenario: How to share a KMS key securely between accounts?

Modify the Key Policy

What happens if a Lambda function times out before completing execution?

It is forcefully terminated by AWS. This can lead to data loss, service disruption, or incomplete transactions if not handled properly

Which AWS service is used to manage concurrency across multiple Lambda invocations?

Lambda concurrency controls