What is Operating system features And Requirement

 Memory management: -

            Before executing the program and data are kept in memory. Most operating systems have more than one program at a time in memory that provides living facilities. The operating system determines that it does not overwrite memory in use at the end of program memory used is released.

 Multi-Programming: -

            More than two processes at the same time to have a second operation is called multi programming. Special techniques are decided by the processor on which of these programs is to run the program. A program that runs the processor at the same time, the processor receives the output Division concluded that the results of the program, and input to the processor division entered offers another program. In the process, the part of the processor is fully busy.

 Multi-Processing: -

             Implementation of more than one task at a time to keep multiple processors on the system. This technique is called multi-processing. Multi-processing systems have been built keeping in mind the multi-processor systems. Therefore, more than one processor to be reachable input-output and processing is coordination between the three functions. The same way the systems that use multiple processors is called symmetric multi-processor systems.

Multi-Tasking: -

            Held in memory of a mutual control over the processes is called multitasking. Pre-condition to secure a program before deleting the control is reached, the program comes on when the control program is in its preliminary stage. Multi-tasking so the user feels that all tasks are running simultaneously.

 Multi-threading: -

             This is the extended form of multi-tasking. More than one thread at the same time a program runs. For example, a spreadsheet calculation time takes long when the user puts the figure.

Real Time: -

             Real Time Operating System process is very fast access to real time operating system is used by the particular act of computer is being controlled. Use of this type is received immediately. And this result is used immediately in their calculations. The process to be controlled, if needed, can be changed. The figures assume continuous operation of computer technology, to count them, organize them in memory, and give instructions based on the calculation results.

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