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InterviewSolution
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Describe the Unix kernel in detail. |
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Answer» The UNIX kernel is the heart of the OPERATING system. It connects to the processor, memory, and I/O management, as WELL as the hardware DEVICES. The kernel manages user requests using system calls that shift the PROCESS from user to kernel space. Every TIME a user process makes a system call, such as read(), fork(), exec(), open(), and so on, a context switch happens. A context switch is a mechanism for changing the state of a process. The process can be stopped until the system call is finished, or it can continue and be notified when the system call is finished through a signal (nonblocking). |
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