OPERATING SYSTEMS

 [OPERATING SYSTEM]

  [ OPERATING SYSTEM ]:(OS) Is An Integrated Set Of Programs That  Controls(Manage) All Resources Of The Computer And That Manage Overal Activities Of The Computer.

[AN OPERATING SYSTEM IS A PROGRAM THAT WORK AS A INTERFACE BETWEEN A COMPUTER USER AND THE COMPUTER HARDWARE.]   

[ EXAMPLE OF OPERATING SYSTEM ] : 

   

   1] WINDOW (OS) 

   2]MS-DOS (OS)

   3]LINUX (OS)

   4]MAC (OS)

[ FUNCTION OF OPERATING SYSTEM ] :

1]MEMORY MANAGEMENT -] Memory Management Module Take Care Of   Allocation And De-allocation Of Memory Space to Programs In Need Of This Resource.

2]PROCESS MANAGEMENT -]  Process Management Helps To Create And  Delete  Process. It Also Provides Mechanism For Communication Among Processes.

3]FILE MANAGEMENT -]  It Manage All The File-Related Activities Such As      Organization Storage,  Retrieval,  Naming,  Sharing And Protection Of Files.

4]DEVICE MANAGEMENT -]   A Computer System Consists Of Several (I/O) Devices  Such As Terminal, Printer, Disk, And Tap. The Device Management Module Of An Operating System Controls All (I/O) Devices.

5]SECURITY -]  Security Modules Protects The Resources And Information Of A        Computer System Against Destruction And Unauthorized Access. 

6]CONTROL OVER SYSTEM PERFORMANCE -] Records Delays Between The Request For A Service And From The System.

7]JOB ACCOUNTING -] Keeps Track Of Time And Resources Used By Various    jobs And Or User.

[ FEATURE OF OPERATING SYSTEM ]

• PROTECTED AND SUPERVISOR MODE
• ALLOWS DISK ACCESS AMD FILE SYSTEMS DEVICE DRIVERS NETWORKING SECURITY
• PROGRAM EXECUTION 
• MEMORY MANAGEMENT VIRTUAL MEMORY MULTITASKING
• HANDLING I/O OPERATIONS
• MANIPULATION OF THE FILE SYSTEM 
• ERROR DETECTION AND HANDLING 
• RESOURCE ALLOCATION 
• INFORMATION AND RESOURCE PROTECTION 

 [ TYPE OF OPERATING SYSTEM ] 

1]BATCH OPERATING SYSTEM -] A Batch operating system is an operating system in which same type of process are collected together and form a batch and then it take all the batches for execution.

2]MULTI PROGRAMMING OPERATING SYSTEM -]   It Is An Operating System In Which There Are Multiple Jobs And Each Job Loaded In The Memory And CPU Executed All Jobs One By One.

3]MULTITASKING SYSTEM -]  This Type Of Operating System Exectes All The Job Together At The Same Time. Actually,  The Switching Between The Job Are So Fast That It gives an Appearance That All The Jobs Are Executing Together.

4]NETWORK OPERATING SYSTEM -] Network Operating System Runs  On A Server. It Provide The Capability To Serve To Manage Data,Groups Security,application,   and Other Networking Functions.  

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