Discuss any 3 functions of operating systems.(9 marks)2. Discuss any 3 :: Computer Science

Discuss any 3 functions of operating systems.(9 marks)2. Discuss any 3 factors affecting the choice of an operating systems.(9 marks)3. Discuss the following types of operating systems.„à  Multi tasking Assignment 9 1. Discuss any 3 functions of operating systems. (9 marks) 2. Discuss any 3 factors affecting the choice of an operating systems. (9 marks) 3. Discuss the following types of operating systems. - Multi tasking - Multi processing - Multi user - Real time (12 marks) 1. 3 functions of operating systems are as follow: a) Manage the computer resources such as central processing unit, memory, disk drives and printer. In other words it acts like a translator which allows the application software to communicate with the computer hardware. b) Caretaker which making sure that date is saved in the right place, programs are loaded into memory properly and that the computer's filing system is all kept in order. c) Execute and provide services for applications software in other words as system tools (programs) used to monitor computer performance, debug problems, or maintain parts of the system. A set of libraries or functions which programs may use to perform specific tasks especially relating to interfacing with computer system components. 2. 3 factors affecting the choice of an operating system are as follow: a) Choice of processor and hardware for example if server machine is a Sun computer then will be forced to use Solaris which is Sun's version of UNIX. b) A hardware or software protocol, contained in the electronics of the disk controller and disk drive, that manages the exchange of data between the drive and computer. The most common interfaces for small computer systems are AT (IDE) and SCSI. c) Compatibility of computer networks types including LANs and WANs, for example UNIX and Window NT are usually use to become the mainframe of WANs networking system. 3. a)Multi tasking - In a multitasking operating system where multiple programs can be running at the same time, the operating system determines which applications should run in what order and how much time should be allowed for each application before giving another application a turn. Examples of multi tasking operating system are UNIX and Window 2000. b)Multi processing - An operating system capable of supporting and utilizing more than one computer processor for example Linux, UNIX, Windows 2000. c)Multi user - A multi user operating system allows for multiple users