The most fundamental task performed by the operating system is to schedule the operation of the CPU, controlling how data and instructions are loaded from memory and accessed by the CPU. The operating system also manages the memory of the computer, organizing storage into files and directories (or folders). Finally, the operating system connects the CPU and memory with the other hardware components of the computer, allowing software applications to access memory and interact with the input/output devices.

What will be an ideal response?

A GUI utilizes intuitive, visual elements to simplify the process of viewing files and executing programs. Programs, directories and files are represented as icons, or small pictures that convey some aspect of the element they symbolize. Windows represent separate workspaces that can be active at the same time, displaying files or executing programs. Most GUIs also utilize pull-down menus of commands, which allow the user to identify and select common commands easily.