An operating system (OS), in its most general sense, is software that allows a user to run other applications on a computing device. An operating system or OS is a software program that enables the computer hardware to communicate and operate with the computer software. Without a computer operating system, a computer and software programs would be useless. Therefore operating system is the resource manager i.e. it can manage the resource of a computer system internally. The resources are processor, memory, files, and I/O devices. In simple terms, an operating system is the interface between the user and the machine. While it is possible for a software application to interface directly with hardware, the vast majority of applications are written for an OS, which allows them to take advantage of common libraries and not worry about specific hardware details. Operating System Interview Questions cover each and every aspect of memory management, job scheduling, etc. Some of the many Operating System Interview Questions listed below will help you get an idea about what questions gets asked in interviews for jobs.