Microsoft Certified: Azure Fundamentals (AZ-900) Practice Exam

The correct answer highlights that FaaS, or Function as a Service, is not classified as a traditional service model within Azure in the same way that SaaS (Software as a Service), IaaS (Infrastructure as a Service), and DaaS (Data as a Service) are.

SaaS provides software solutions hosted on the cloud, allowing users access to applications over the internet without needing to manage the underlying infrastructure. IaaS delivers virtualized computing resources over the internet, granting users control over the operating systems and applications they run. DaaS, which stands for Data as a Service, enables on-demand access to data and databases through a cloud service.

While FaaS is a cloud computing model that allows users to run functions or pieces of code in response to events or triggers, it is considered a subset of serverless computing. It abstracts away the infrastructure management completely, differing from the more traditional service models. This distinction is important since FaaS focuses specifically on executing code, rather than providing the broader resources and services that characterize SaaS, IaaS, or DaaS.