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The operating system maps files onto physical media and accesses these media through storage devices. magnetic tape, magnetic disk and an optical disk.
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The OS is responsible for the following activities in connection with memory management. The central processor reads instructions of a process from main memory during the machine cycle. It contains the code, data, stack, and other parts of a process. Main memory is a repository of quickly accessible data shared by the CPU and I/O devices. These bytes are called memory locations and range in size from hundreds of thousands to billions. Main memory is a large array of words or bytes.
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Deallocate space when processes terminate.Allocate the appropriate amount of memory space when programs are to be loaded into the memory for executing.Ensure that a new file does not overwrite an existing file.
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#Commander one operating system software#
In short operating system is a resource manager who manages both hardware and software resources efficiently. It also decides how and when to allocate and deallocate resources so that computer system can run efficiently. Operating system manages all the resources and receives many simple and conflicting requests. DescriptionĪ computer system has various hardware and software resources required to solve some problem storage space, CPU time and I/O devices etc. Operating system provides the user a simple and user-friendly interface to perform their specific tasks. It is due to the operating system, the user of the computer does not have to deal directly with the hardware to get their work done.