MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -The I/O system of an OS works by taking I/O request from an application software and sending it to the physical device, which could be an input or output device then it takes whatever response comes back from the device and sends it to the application.

Detailed explanation-2: -I/O units (Keyboard, mouse, printer, etc.) typically consist of a mechanical component and an electronic component where electronic component is called the device controller. There is always a device controller and a device driver for each device to communicate with the Operating Systems.

Detailed explanation-3: -Process management is a critical function of the operating system. By managing processes, the operating system can ensure that resources are used efficiently and that the system remains stable. In addition, process management allows the operating system to control how programs interact with each other.

Detailed explanation-4: -The operating system uses several software techniques to manage memory. All memory areas, allocated or available, are preceded and followed by structures known as memory links. These links contain information about the area that they enclose.