1. FUNCTIONS OF AN OPERATING SYSTEM ANEESH M.R

2. FUNCTIONS OF AN OPERTING SYSTEM 1.Device management : In a multitasking operating system where multiple programs can be running at the same time ,the operating system determines which application should runin what order and how much timeshould be allowed for each application before givinganother applications 3. FUNCTIONS OF AN OPERTING SYSTEM2.User interface: It allows individuals to access and commandthe computer system Command based user interface: It requires that textcommands be given to the computer to perform basic activities. 4. FUNCTIONS OF AN OPERTING SYSTEMGraphical used interface(GUI): Uses icons andmenus displayed on screen to send commands to the computer system. 5. FUNCTIONS OF AN OPERTING SYSTEM 3. Memory management: The management of memory determines the performance of computers. So it becomes the major task to manage the memory in a better way. It allocatesthe main memory and storage area for different job such that memory can be utilized. It has two types of allocation; one is single contiguous location and second is partitioned allocation 6. FUNCTIONS OF AN OPERTING SYSTEM4.Process management : major job of the OS is to allow a processor to the various jobs and processes manages that whichjob will execute first. For this purpose it will uses a jobschedulinglogarithms.criteriahavingscheduling 7. FUNCTIONS OF AN OPERTING SYSTEM 5. File management or information management: Whole of the data, programs and information be stored in the secondary storage devices in the form of file. It stored the different files on various devices andtransfer these files from one storage device to another. It also manages all the files for creation, renaming, copying,reading,operations.appendingandthedeletion 8. FUNCTIONS OF AN OPERTING SYSTEMIt is also used for the editing of the files. Backup of files and folders can be taken with the help of an operating system. It provides convenient procedures for storing and accessing the information from files or directories. 9. FUNCTIONS OF AN OPERTING SYSTEM 6. Job Scheduling: It establishes and enforces a job priority system by settingsomejobschedulingcriteriaandjobmanagement system. Scheduling is a fundamentalfunction of an operating system. Scheduling refers to a set of policies and mechanism supported by the operating system that controls the order in which, the work to be done is completed. 10. FUNCTIONS OF AN OPERTING SYSTEM 7. Interpreter: It also called command interpreter. As we know that the computer can understand the machine language like English, French etc..there be need of someinterpreter. Itinterprets all the operating systemsexecutable and system command and instructions in according to the given format or according to the defined syntax. 11. FUNCTIONS OF AN OPERTING SYSTEM8. Security In a multi user environment security is necessary, because a file is shared by a number of users. The security can be provided with the protection system of an operating system. The facility of protection of files or folders from unauthorized access can be provided with the help of powerful operating system. 12. FUNCTIONS OF AN OPERTING SYSTEM9. Secondary storage management The major job of the computer system is data processing. As the data processing uses data and programs. So there be need of storage space to store the data and programs. For this purpose secondary storage devices are required i.e. need of secondary memory. This memory can easily managed by the operating system. . 13. FUNCTIONS OF AN OPERTING SYSTEM So operating system keeps track of the space available on the disk and allocate the space to the data and the program on the secondary storage disk or drum for the storage purpose 14. THANKS