Select one or more of the following: Which of these events will cause signal(s) to be generated by the kernel (the operating system itself) and sent to your childless foreground process?

a. The process has done something wrong (segmentation fault, etc.)
b. A timer has expired, which sends the signal SIGALRM
c. The process has exited normally

a. The process has done something wrong (segmentation fault, etc.)

Explanation:

Events that cause signals to be generated by kernel and sent to childless foreground process is the process has done something wrong(segmentation fault), as Hardware exceptions generate signals,for example, divide by 0 or invalid memory reference. These conditions are usually detected by the hardware, and the kernel is notified. The kernel then generates the appropriate signal for the process that was running at the time the condition occurred.

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