In cloud computing, which model does the provider manage hardware and the operating system, while you manage applications and data?

• A. IaaS
• B. PaaS
• C. SaaS
• D. DaaS

Answer: (A)

The situation described is about who handles the platform versus who handles the code and data. In Platform as a Service, the provider runs and maintains the entire platform stack—hardware, virtualization, the operating system, runtime, and middleware. You’re responsible for developing, deploying, and managing your applications and their data. This separation lets you focus on software while the platform takes care of the underlying environment.

This differs from IaaS, where you still manage the operating system and above, just using virtualized hardware and networking; from SaaS, where the provider delivers and manages the software you use; and from DaaS, which centers on data services. So the described model fits Platform as a Service best.