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Yes, I had this test also.
Driver.
Drivers are a kind of software that control devices. Operating system needs drivers to understand how to handle devices.
The operating system (OS) controls the hardware. A successful computer system will have hardware and an operating system. Application software is not required. All operating systems have a low level, or machine language to run the operation system and control all hardware.
A mobile operating system is an operating system (the most basic instructions to allow a device to load software and control hardware) specifically for mobile devices.
hardware
as I remember it the main ways to control peripherals on a computer or computer based systems is software, mediumware, firmware and hardware, things may have changed since i was last at school, but it is worth checking out them all, mediumware may have evolved into firmware by now, but you never know, check it out :) So essentially you have hardware which is controlled by its firmware, the firmware is what the operating system (mediumware)uses to control the hardware, and the software is the part that interacts with the operating system (mediumware) to make it possible for anyone to use the hardware in a nutshell.
An operating system takes control by effectively managing user input. It also manages both external and internal requests. This can include program and application requests, along with information sent via keystrokes and other protocols. The main function of any operating system is to assist the CPU in facilitating user and program functions.
Operations Management Software is software to help a person oversee, and control the production process of the facility. The software organizes these processes to make the job run smoother.
hardware
No, an operating system is a collection of programs that coordinate the operations of the computing hardware and other software and provides an interface with the user to facilitate his/her usage of the machine.