1. What is an operating system? Identify and describe the main functions (sub systems) of an operating system. 2. Windows is a multitasking operating system. What is a task? What is multitasking? What are the characteristics and benefits of multitasking? 3. Describe and compare tasks running in foreground and background? 4. What is a user interface? Identify and describe the 2 main types of user interfaces in modern day operating systems. s. When using Windows GUI, what happens when you maximize a window (be specific)? Compare maximizing with opening. 6. When using Windows GUI, what happens when you minimize a window (be specific)? Compare minimizing with closing. 7. When using Windows GUI, how do you execute a program? If multiple programs (tasks) are running, how can you switch between those programs (tasks)? s. Describe a disk drive, folder and file and the purpose each serves ona computer. 9. Identify and describe the two main categories of files found on the computer's hard disk