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Multi Programming Operating System

  Multi programming  system ·           Multi programming operating system allows multiple users to execute multiple programs using a single CPU concurrently i.e. at the same time. ·           In multiprogramming several process are kept in the main memory and CPU execute all these processes concurrently. It means, the CPU immediately switches from one process to next that are ready to get executed ·           In such an operating system when one process start process start performing the instructions from several programs at the same time. ·           Rather, it means that there are number program available to CPU and that portion of one is executed, then segment of another and so on                                 ...
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Defination of OS(operating system) and its concepts

    What do you mean by operating system?     Definition :  An operating system is a program that act as an interface between the user of a computer and the                                      Computer hardware. Operating system is a first program that gets loaded into the memory through a process called booting. Concepts of operating system : ·                       The purpose of operating system is to provide an environment in which a user can execute program in a convenient and efficient manner. ·                       Operating system is an integrated set of program that ma...
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Client server architecture

  Client server architecture Client - server architecture  is distributed  model  representing dispersed responsibilities among independent computers integrated across a network. Therefore,  it's  easy to replace, repair, upgrade and relocate a  server  while  client  remains unaffected. Advantages of Client-Server Architecture: Organizations often seek  opportunities to maintain services and quality competition to sustain its market position with the help of technologies. Deployment of client-server computing in an organization will effectively increase its productivity through the usage of  cost-effective user interface, enhanced data storage, vast connectivity and reliable application services Improved Data Sharing:   Data is retained by usual business processes and manipulated on a server is available for designated users (clients) over an authorized access. Integration of Services:   Every client is given the opp...
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Batch Processing Operating System

  Batch processing system ·           Batch processing is one of the oldest method    of running the programs ·           The computer in the past were very large in size and their I/O devices were very different from those that are used today. The job processing was not interactive as it is today. ·           The user did not interact directly with computer system.   ·           The process scheduling , memory management, file management and I/Omanagement functions are quite simple in batch processing system   1.         Process scheduling (i.e. allocation strategy for a processor is typically in order of their arrival i.e. first come first served(FCFS)basis.   2.         Memory management  is done by divi...
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Multi processing system

  Multi processing system ·           Multi processesor system is the sytem that contain two or more processors or CPUS and has ability to simultaneously execute     several programs. Hence the name multi-processor In such a system, multiple processor share the clock, bus, memory and peripheral devices. ·           A multi processor system is also known as parallel system ·           Multi processor system are categorized into two different types:                single user operating system    2.        Multi user operating system   3.         Batch processing operating system 4.        Multi programming operating system   5.       Multi tasking operating sy...
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