System failure can occur because of a hardware problem, a software problem, or computer sabotage.

Constant variables:

a. Can be assigned values in executable statements. b. Do not have to be initialized when they are declared. c. Can be used to specify array sizes, thereby making programs more scalable. d. Can be used to specify array sizes, but this makes programs harder to understand.

The array argument to execvp tells the kernel

A. what strings to pass to main in the new program B. what list of directories to search to find the new program