UGC NET Questions (Paper – 1)

Statements A, B and D correctly define IaaS, SaaS and PaaS, whereas statement C contradicts the very idea of cloud computing. In cloud models, many applications and resources are hosted remotely and accessed over networks, so local installation is not always required. IaaS offers virtual hardware, SaaS provides ready-to-use applications and PaaS supplies a development platform. Hence, the combination that includes A, B and D but excludes C is the correct answer.

Option A:
Option A is incorrect because it includes only A and B and omits D. While A and B are true, statement D is also correct in describing PaaS as a cloud-based development environment. Excluding a true statement means this option does not fully represent cloud computing models.

Option B:
Option B is correct because it selects A, B and D, the three accurate statements. It captures the distinctions between infrastructure, platform and software services in the cloud. By excluding the false claim in C, it reflects the essential features of cloud computing.

Option C:
Option C is incorrect because it lists only B and D as correct and omits A. Statement A is also valid, explaining virtualised infrastructure in IaaS. Any answer that leaves out one of the true statements fails to answer the question completely.

Option D:
Option D is incorrect because it assumes all four statements are correct. Accepting statement C would imply that cloud computing always depends on local installation, which is the opposite of its typical usage. Including this false statement invalidates the combination.

In cloud computing, Software as a Service provides ready to use applications over the internet. Users access the software through a browser without managing installation or maintenance on local machines. Many LMS platforms are offered as SaaS to educational institutions. Therefore, the scenario described clearly fits Software as a Service.

Option A:
Option A is correct because SaaS specifically refers to using complete applications hosted by a provider and accessed online. It removes the need for local installation and updates. In educational contexts, cloud based LMS and office suites are classic examples of SaaS.

Option B:
Option B, Platform as a Service, focuses on providing development platforms and tools for building applications, not full ready to use applications for end users. PaaS targets developers rather than ordinary institutional users. Hence it does not best describe simply using an LMS online.

Option C:
Option C, Infrastructure as a Service, provides virtual machines, storage and networks, which are lower level building blocks. Institutions still need to install and manage their own software on top of IaaS. This is different from directly consuming a finished LMS via browser.

Option D:
Option D, Data as a Service, emphasises access to data through APIs and not complete application functionality. While data may be involved, the question highlights software use, so DaaS is not the most accurate fit.