2. Can UNIX exec return an error? Why or why not? Note: You can answer this question by looking at the manual page for exec, but before you do that, think about what the exec system call does. If you were designing this call, would you need to allow it to return an error? 2. Can UNIX exec return an error? Why or why not? Note: You can answer this question by looking at the manual page for exec, but before you do that, think about what the exec system call does. If you were designing this call, would you need to allow it to return an error