Question: 1. (i) Explain the reason why a system call must be implemented in the kernel of the operating system (i.e. in system mode). (ii) Some

1. (i) Explain the reason why a system call must be implemented in the kernel of the operating system (i.e. in system mode).

(ii) Some early CPUs (e.g. INTEL 8086) did not implement a mode bit so the operating system and the user applications execute in the same mode of operation. Explain, if possible, how the system resources could be protected in such architecture.

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