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4 various operating systems
- 1. Topic : Basics of Operating Systems Sub Topic : Various Operating Systems 1
- 2. Recap In the last class, you have learnt about • History of Operating System • Need and definition of the operating system 2
- 3. Objectives On completion of this period, you would be able to know • The Classification of Operating System 3
- 4. Classification of Operating System Classification is based on: • Interface • Number of users • Response time and program / job execution 4
- 5. Operating Systems Based on User Interface • Character Based:- Commands are entered using keyboard only to perform an operation Ex:-UNIX, MS-DOS • Graphical User Interface :-Either keyboard or mouse is used to perform an operation Ex:- Windows, Macintosh, LINUX 5
- 6. Example Creation of file in MS-DOS Mode: • C:> COPY CON filename.txt • Then press enter key • Type the data • Press control key+z , to save the file Creation of file in Windows mode: Click on the following • Start Programs Accessories notepad Now notepad window will be opened, type the data and save the file 6
- 7. Based on Number of Users • Single-User Ex:- MS-DOS, Windows • Multi-User Ex:-UNIX, XENIX, LINUX etc., 7
- 8. Single-User, Single-Task Operating System • Operating system manages one user account • Only one program will be under execution at any time Ex:- MS-DOS 8
- 9. Single User, Multi Task Operating System • Can keep many user accounts, but not simultaneously • Several programs / tasks may be under execution at the same time • Used in desktop, and laptop computers Ex:- Windows 9X, OS/2 etc., 9
- 10. Based on Response Time and Mode of Program Execution • Batch Processing • Multi – Programming • Time Sharing • Real time • Hybrid 10
- 11. Batch Operating System • Batch processing is execution of a series of programs ("jobs") on a computer without manual intervention • A program takes a set of data files as input, process the data, and produces a set of output data files • In "batch processing" the input data are collected into batches on files and are processed in batches by the program
- 12. Batch Operating System (contd..) • Used in mainframe computers Benefits • It allows sharing of computer resources among many users and programs • It avoids idling the computing resources with minute-by-minute manual intervention and supervision 12
- 13. Multi-User Operating System • Can keep many users account concurrently (many users working in the system at the same time) • Can execute several programs simultaneously Ex :- UNIX 13
- 14. Network Operating System • Provides multi-user environment • Provides network services and communications Ex:- Windows NT, Novell Netware, Windows Server 2003 14
- 15. Summary • Operating system are classified based on : Interface, Number of users, Processing mode • MS-DOS : Single user – Single task, character mode OS • Windows : Single user – Multitasking, GUI mode OS • UNIX : Multi-user, Multi-tasking OS • Batch, Multiprogramming, Time Sharing, Real-Time, Hybrid Operating Systems are based on response time and mode of program execution 15
- 16. Frequently Asked Questions 1. Write the classification of Operating Systems 2. Write the Operating System processing modes 3. Name any five Operating Systems 16
- 17. Quiz 1. Which is the single-user, single-tasking Operating System ? a. MS-DOS b. WINDOWS c. UNIX d. MACINTOSH 17
- 18. Quiz 2. Which is the Multi-user Operating System ? a. MS-DOS b. WINDOWS c. UNIX d. MACINTOSH 18
- 19. Previous question papers for operating systems • Web designing • Micro processors • C++ tutorials • java home 19