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What is an operating system?

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What is an operating system?

(a) collection of programs that manages hardware resources

(b) system service provider to the application programs

(c) interface between the hardware and application programs

(d) all of the mentioned

I got this question in an interview for job.

This question is from Basics topic in portion Processes of Operating System

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Correct option is (d) all of the mentioned

The best explanation: An Operating System acts as an intermediary between user/user applications/application programs and hardware. It is a program that manages hardware resources. It provides services to application programs.

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