Question: On Unix, two signals that cannot be caught and handled by an application are SIGKILL and SIGSTOP. a ) SIGKILL immediately terminates a process. What

On Unix, two signals that cannot be caught and handled by an application are SIGKILL and SIGSTOP.
a) SIGKILL immediately terminates a process. What is a scenario that motivates having the OS make it impossible for an application to handle SIGKILL?
b) SIGSTOP immediately pauses a process (which can later be resumed with SIGCONT). Why is it safe (in terms of application correctness) for an application to be arbitrarily paused using SIGSTOP?

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