Discuss the essential functions of an Operating System.

An Operating System executes many functions to operate computer system efficiently. Among them, four essential functions are as follows: Resource Management: An operating system manages a collection of computer hardware resources by using a variety of programs. It manages computer system resources, including its CPU, primary memory, virtual memory, secondary storage devices, input/output peripherals, and other devices. Task Management: The function of the operating system that controls the running of many tasks. It manages one program or many programs within a computer system simultaneously. That is, this function of operating system manages the completion of users' tasks. A task management program in an operating system provides each task and interrupts the CPU operations to manage tasks efficiently. Memory Management: Through this operating system keeps track of all the memory locations whether they are free or allocated. It also determines how and how much memory needs to be allocated to a process so that it can be executed smoothly. It also manages the allocation and deallocation of memory when operating system is handling multiple processes at a time. File Management: This is a function that manages data files. An operating system contains file management programs that provide the ability to create, delete, enter, change, ask, and access of files of data. They also produce reports on a file. User Interface: It is a function of an operating system that allows users to interact with a computer. A user interface program may include a combination of menus, screen design, keyboard commands. A well-designed user interface is essential for an operating system to be popular, because of the function, users can load programs, access files, and accomplish other tasks.