Question: I have 2 OS question please help (1)Write a pseudo-code for exec(), fork(), waidpid(), and exit() system calls. Explain how these system calls are inter-related.

I have 2 OS question please help

(1)Write a pseudo-code for exec(), fork(), waidpid(), and exit() system calls. Explain how these system calls are inter-related.

(2)Discuss pros and cons of implementing a thread system at the kernel level or at the user level. Is implementing a thread system at the user level useful anyway, since the kernel can only see I/Os are done at the process level?

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