Operating system functions – UGC NET Question

Statements A, B and D correctly describe core functions of an operating system, while statement C is false. The operating system does manage memory, processes and I/O, it offers a user interface, and it handles files and directories. It is not a specialised text-editing application, so describing it as such is misleading. Thus, the combination that includes A, B and D but excludes C is the only correct answer.

Option A:
Option A is incorrect because it includes only statement A and ignores B and D. Although statement A is true, the question asks for all correct statements, and both B and D also describe essential operating system functions. Leaving these out makes the option incomplete.

Option B:
Option B is incorrect because it combines A and B but omits D. Statements A and B are indeed correct, but D is also accurate in attributing file management to the operating system. Since one true statement is missing, this option does not provide the full set of correct statements.

Option C:
Option C is correct because it brings together A, B and D, which are all true. It excludes statement C, which wrongly claims that an operating system is just an application for text editing. By including all and only the correct statements, this option matches the conceptual role of operating systems in ICT.

Option D:
Option D is incorrect because it includes statement C along with B and D. While B and D are true, C misrepresents the nature of an operating system. Including a false statement means the combination cannot be considered fully correct.