Operating system

OPERATING

SYSTEM

-BySwastik Dugar

IX B

WHAT IS AN OPERATING SYSTEM ?

•AN OPERATING SYSTEM IS AN INTERFACE BETWEEN HARDWARE AND USER WHICH IS RESPONSIBLE FOR THE MANAGEMENT AND COORDINATION OF ACTIVITIES AND THE SHARING OF THE RESOURCE COMPUTER. •SOFTWARE THAT CONTROLS THE ALLOCATION AND USAGE OF HARDWARE RESOURCE SUCH AS MONEY , CPU TIME , DISK SPACE , AND INPUT OUTPUT DEVICE.•THE FOUNDATION SOFTWARE OF A MACHINE ; THAT WHICH SCHEDULES TASKS , ALLOCATES STORAGE , AND PRESENTS A DEFAULT INTERFACE TO THE USER BETWEEN APPLICATION.

FUNCTIONS OF OPERATING

SYSTEM• It manages the hardware and software resources of the system .In a desktop computer, these resources include the processor , memory, disk space, and many more .

• It provides a stable and consistent way for applications to deal with the hardware without knowing all the details of the hardware.

OPERATING SYSTEM QUICK OVERVIEW USER APPLICATION

OPERATING SYSTEM

HARWARE

EXAMPLE OF OPERATING SYSTEM• Microsoft Windows

• Mac Os X• Unix Operating System

• BSD• Plan 9• Linux and GNU• Google Chrome OS

MODELS OF OPERATING SYSTEM •Monolithic Systems•Layered Systems•Virtual Machines•Client Server Systems

OPERATING SYSTEM TASKSoThe operating system's tasks, in the most general sense, fall into six categories :

• Processor Management• Memory Management• Device Management• Storage Management• Application Interface• User Interface

COMPONENTS OF OPERATING SYSTEM

• The User Interface.• The Kernel.• Program Execution.• Protect Mode, Supervisor Mode And Virtual

Modes.• Memory Management.• Virtual Memory.• Multitasking.• Disk Access And File Systems.• Device Drivers.• Networking.• Security.

TYPES OF OPERATING SYSTEMType Definition Example Of

UseBatch Processing Systems

Data or programs are collected grouped and processed at a later date.

Payroll, stock control and billing systems.

Real Time Systems

Input immediately affect the output but the timing is critical.

E.g. control of nuclear power plants, oil refining, etc.

Real Time Transactions

Input immediately affect the output but the timing is not critical.

Holiday and airline booking systems.

Online-Offline Processing

Processing which is done under and away from the CPU.

E.g. batching together of lock cards, filing in OMR forms.

Multi-access on-line

Any user linked by workstation to a central workstation as in a network.

One person must logout when other is updating the file.

Interactive processing

The program is only processed by the user.

Select from a menu at ATM.

Distributed System

Processing is carried independently in more than one location by many users.

Database E.g. library.

Multiprogramming

Ability to run many programs at single time.

Mainframe Systems.

Multi Tasking Can hold many programs in hand and user can switch between them.

Usually uses GUI’s. Facilitates import and export of data.

ACKNOWLEDGEMENT

I feel glad to thank my teacher for assigning us such a knowledgeable project about operating system. Also I’ll thank the Google and my computer book which assisted me in the making of this Presentation.

Thank

You