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      Question

      In cloud computing, which service model provides

      virtualised computing resources — such as virtual machines, storage, and networking — over the internet?
      A Infrastructure as a Service (IaaS) Correct Answer Incorrect Answer
      B Platform as a Service (PaaS) Correct Answer Incorrect Answer
      C Software as a Service (SaaS) Correct Answer Incorrect Answer
      D Function as a Service (FaaS) Correct Answer Incorrect Answer
      E Database as a Service (DBaaS) Correct Answer Incorrect Answer

      Solution

      IaaS provides the fundamental building blocks of cloud computing — virtualised compute (VMs), storage, and networking — on a pay-as-you-go basis. The user manages the OS, middleware, runtime, and applications; the provider manages the physical hardware. Examples include AWS EC2, Microsoft Azure Virtual Machines, and Google Compute Engine. 

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