Cloud service models – UGC NET Question

Statements A, B and C correctly describe the three main cloud service models, while statement D is false. In SaaS, complete applications are provided over the Internet; in PaaS, developers obtain an environment to run their code; and in IaaS, virtual machines, storage and networks are offered as services. Users typically do not handle the underlying physical hardware, which is managed by the cloud provider, so D must be excluded. Therefore the correct combination is A, B and C only.

Option A:
Option A is incorrect because it includes only A and B and omits C. While SaaS and PaaS are described accurately, IaaS is also a key model that must be included for a complete answer. Excluding C makes the option incomplete.

Option B:
Option B is incorrect because it groups A, C and D as correct statements. Although A and C are true, D is false because cloud users rarely manage physical data centre infrastructure. Including D invalidates the combination.

Option C:
Option C is correct because it gathers the three accurate statements defining SaaS, PaaS and IaaS and leaves out the misleading claim in D. It reflects the layered nature of cloud services where physical hardware is abstracted away from end-users.

Option D:
Option D is incorrect because it treats B, C and D as correct, again accepting D. Even though B and C are true, including the incorrect description of user responsibility for hardware makes this option wrong.