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 SUBMITTED BY:
 RAM KUMAR CHUGH
 IT B
 ROLL NO:78
 SUBMITTED TO :
 operating system is the set of programs that
controls a computer.
 It provide a pleasant and effective interface
betwee...
 a collection of programs which control the
resources of a computer system
 written in low-level languages (i.e. machine...
Operating
System
Device configuration
Controls peripheral devices connected to the computer
File management
Transfers file...
 Process Management
 Memory Management
 File Management
 Security management
 Command Interpreter
 By process management OS
manages many kinds of activities
:-
All process from start to shut down
Creation and deletion...
 The major activities of an
operating regard to memory-
management are:-
Decide which process are loaded into memory
whe...
 The file management system
allows the user to perform such
tasks:-
Creating files and directories
Renaming files
Copi...
 By security management OS
manages many tasks such as:-
Alert messages
Dialogue boxes
Firewall
Passwords
 A command interpreter is an
interface between system and the
user. There are two types of user
interface:-
Command line...
 With a command line user interface the
user interact with the OS by typing command
to perform specific tasks
 With a gr...
 best use of the computer resources
 provide a background for user’s programs to
execute
 display and deal with errors ...
 a part of operating system to control disk
operation
 2 parts
› small system data
 keep track of key information of th...
 efficient
› time spent to execute its programs should be
short
 small in size
› memory occupied should be as small as p...
 Batch processing
 Real time processing
 Time sharing processing
 Jobs, together with input data, are fed into
the system in a batch.
 The jobs are then run one after another.
 No job ...
 immediate response is needed.
 For example
› anti-missile defense system
› airplane landing control system
› interrupt ...
 Each user is given a time slice to interact
with the CPU.
 The size of the time slice will depend on
the system.
 Each...
 multi-tasking
 multi-programming
 parallel processing
 buffering
 spooling
 a temporary storage area (buffers) to read
data from input device or send data to the
output device
 keep CPU busy
› be...
 a larger buffer from hard disk
 buffer store the data through I/O operation
› because I/O operation is slow and CPU
ope...
Ram iit ppt
Ram iit ppt
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Ram iit ppt

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Ram iit ppt

  1. 1.  SUBMITTED BY:  RAM KUMAR CHUGH  IT B  ROLL NO:78  SUBMITTED TO :
  2. 2.  operating system is the set of programs that controls a computer.  It provide a pleasant and effective interface between the user and the hardware  Makes the computer more convenient to use
  3. 3.  a collection of programs which control the resources of a computer system  written in low-level languages (i.e. machine- dependent)  an interface between the users and the hardware  when the computer is on, OS will first load into the main memory
  4. 4. Operating System Device configuration Controls peripheral devices connected to the computer File management Transfers files between main memory and secondary storage, manages file folders, allocates the secondary storage space, and provides file protection and recovery Memory management Allocates the use of random access memory (RAM) to requesting processes Interface platform Allows the computer to run other applications
  5. 5.  Process Management  Memory Management  File Management  Security management  Command Interpreter
  6. 6.  By process management OS manages many kinds of activities :- All process from start to shut down Creation and deletion of user and system processes.
  7. 7.  The major activities of an operating regard to memory- management are:- Decide which process are loaded into memory when memory space becomes available. Allocate and deallocate memory space as needed.
  8. 8.  The file management system allows the user to perform such tasks:- Creating files and directories Renaming files Coping and moving files Deleting files
  9. 9.  By security management OS manages many tasks such as:- Alert messages Dialogue boxes Firewall Passwords
  10. 10.  A command interpreter is an interface between system and the user. There are two types of user interface:- Command line Graphical user interface
  11. 11.  With a command line user interface the user interact with the OS by typing command to perform specific tasks  With a graphical user interface the user interacts with the OS by using a mouse to access windows icons and menus
  12. 12.  best use of the computer resources  provide a background for user’s programs to execute  display and deal with errors when it happens  control the selection and operation of the peripherals  act as a communication link between users  system protection
  13. 13.  a part of operating system to control disk operation  2 parts › small system data  keep track of key information of the disk › data area  where data file is stored
  14. 14.  efficient › time spent to execute its programs should be short  small in size › memory occupied should be as small as possible  reliable
  15. 15.  Batch processing  Real time processing  Time sharing processing
  16. 16.  Jobs, together with input data, are fed into the system in a batch.  The jobs are then run one after another.  No job can be started until previous job is completed
  17. 17.  immediate response is needed.  For example › anti-missile defense system › airplane landing control system › interrupt error in computer system
  18. 18.  Each user is given a time slice to interact with the CPU.  The size of the time slice will depend on the system.  Each user is served in sequence.
  19. 19.  multi-tasking  multi-programming  parallel processing  buffering  spooling
  20. 20.  a temporary storage area (buffers) to read data from input device or send data to the output device  keep CPU busy › because I/O operation is slow
  21. 21.  a larger buffer from hard disk  buffer store the data through I/O operation › because I/O operation is slow and CPU operation is fast

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