B (Platform as a Service – PaaS): In a PaaS model, the cloud provider manages the operating system, middleware, runtime, and platform stack. The customer is only responsible for deploying and managing the application itself.
This abstraction allows developers to focus on application logic without worrying about the infrastructure or platform details.
Other options explained:
A (IaaS): Customer manages OS, middleware, and runtime; provider manages hardware and virtualization.
C (SaaS): Customer simply consumes the application; all layers are managed by the provider.
D (BMaaS): Bare Metal as a Service — customer has full control over hardware and all software layers.
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