Under the AWS shared responsibility model, which task is AWS responsible for?

AWS is responsible for "security OF the cloud," which includes the underlying infrastructure, hardware, software, networking, and facilities that run AWS services. This includes performing automated backups of Amazon RDS instances, as RDS is a managed service where AWS handles the operational aspects of the database. Applying guest operating system patches to Amazon EC2 instances is a customer responsibility ("security IN the cloud"), as customers manage the operating system on their EC2 instances. Providing monitoring for human resources information management (HRIM) systems is also a customer responsibility, as HRIM systems are applications deployed and managed by the customer. Optimizing the costs of running AWS services is a shared responsibility, but primarily falls to the customer to manage their usage and configurations efficiently.