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Operating Systems (What is the kernel? (It is the central component of an…
Operating Systems
What is the kernel?
It is the central component of an operating system that interfaces between the user and the software system or between the hardware components and the software applications. It also allocates memory so that all programs run smoothly when the computer is on. It also decided in what order the programs will be executed. The kernel has a separate space in memory which allows it to function independently. It acts as a central authority which guides memory and keeps an eye on all the hardware and software data. The kernel should not be confused with the bias, which is in charge of booting the computer.
File Manager-all file managers allow the user to view, edit, copy, and delete the files on their computer storage devices
Device Driver-Without drivers, the computer would not be able to send and receive data correctly to hardware devices, such as a printer
Memory Manager-manages memory more efficiently and provides additional features such as flushing out unused segments of memory
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Thrashing occurs when a computer's virtual memory resources are overused, leading to a constant state of paging and page faults, inhibiting most application-level processing.
This virtual memory is actually the memory of the hard disk and it is then mapped into the physical memory.
User Interface-A user interface is the method by which the user and the computer exchange information and instructions. There are three main types - command-line, menu driven and graphical user interface (GUI).
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The high level scheduler (or long term scheduler) is responsible for admitting new processes to the system on the ready queue
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Privileged instruction is an instruction (usually in machine code) that can be executed only by the operating system in a specific mode.
On receipt of an interrupt, the processor passes control back to the operating system, which executes the necessary interrupt-handling routine
Kay formulated the idea of a graphical user interface (or GUI). The interface he envisaged had all of the features we can now see in a modern desktop environment, including a separate window for each application, a menu-driven application environment, and many other features now in common use. #Lisa
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