As discussed in Section 3.6, Case Study: UNIX Processes, UNIX processes may change their priority using the nice system call.What restrictions might UNIX impose on using this system call, and why?
What will be an ideal response?
UNIX systems allow all processes to possibly decrease their scheduling priority; doing so does not negatively impact the level of service given to other processes in the system. However, if a process is allowed to boost its scheduling priority, it will receive higher levels of service, possibly to the detriment of other processes in the system.Therefore, UNIX systems prevent a process from increasing its scheduling priority unless the process has been created by the system administrator (also called the superuser).
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