Purpose of os

Purpose of os

• 1.
  PURPOSE OF OPERATING SYSTEM It is the most important program that runs on the computer. Every computer must be running and operating system program to run all other programs. The operating system does basic stuff like what you type on the keyboard is what is shown on the monitor ect. Operating systems can have a lot of users running at the same time on it and it makes sure all of the files are separated and kept up to date. Also makes sure people that should not be on the files do not get on it. It allows you to run more than one program at a time. Examples of modern operating systems are iOS, Linux, Android, Microsoft Windows and MAC OS X.
• 2.
  PURPOSES OF OS Wheremight you find an Operating System? They are found in the personal computer, sat nav, game console, cars, phone. A system program that controls and organises the general operation of the computer. What are the main functions of an Operating System? Memory management, device management, store management, user interference. What role does the OS play in managing the processor? The OS controls what goes into the CPU, like music, documents and more. What is virtual memory? When you run a program on your computer, you use RAM to run it. You tell the computer to run the program and the processor pulls it from the hard drive and loads it into RAM so it can be worked with.
• 3.
  PROCESSOR MANAGEMENT This ison of the main functions of an operating system. It ensures that applications and the things the computer processes have enough of the processors time to function properly. Applications run on the processor e.g. if you have documents open the processor allows things to run in the background like the internet or any other document. Processor can be controlled by the user, by other applications that want to open or close programs or by the operating system when it is shutting down it closes the applications. If there is errors like problems with the memory it could slow the processor down and this makes applications go slower. The processor can only do one thing at once, in order to have many things running at the same time the operating system has to switch between different processes thousands of times a second. The operating system helps to control processes by buffering. Buffer takes input from devices(keyboard, mouse ect..) Releases the process when the processor is able to carry out the instruction.
• 4.
  MEMORY MANAGEMENT/STORAGE DATE MANAGEMENT This is another main function of an operating system. This is also known as RAM . It manages the computer memory. It is used to store data and programs while the computer is on. It keeps track of them when you save it and frees space when you no longer need the data. The OS loads programs and data from the hard drive into memory (RAM). RAM can only hold so much data, so the OS swaps data in and out when its needed. It is volatile, it will lose everything if the computer is switched off. Storage management keeps record of where date is stored on the hard disk. Different operating systems use different file systems.
• 5.
  USER INTERFACE Graphical userinterface is user icons, graphic pointer to interact with the system. Command line interface is when user types in commands into a command prompt. The point of user interface is so the user can interact with the computer.