A company has a web application that is in the cloud on a multitenant server. The web application is connected to a database that is also in the cloud. Which of the following cloud computing concepts

Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, giving users control over operating systems, applications, and middleware, but the provider manages only the virtualization, servers, storage, and networking, requiring more customer management than described.

Platform as a Service (PaaS) provides a complete development and deployment environment in the cloud, including the operating system, programming language execution environment, database, and web server. The user manages their applications and data, while the cloud provider manages the underlying infrastructure (servers, storage, networking) and platform components, fitting the description of a web application and database running on multitenant cloud servers.

Software as a Service (SaaS) delivers ready-to-use software applications over the internet. The user only interacts with the application, not managing any underlying infrastructure or platform, which is not the case for a company running its own custom web application.

DaaS (Desktop as a Service) is a form of virtual desktop infrastructure where the desktop environment is hosted by a third-party cloud provider, which is unrelated to hosting web applications and databases.