CS360 Midterm -- May 2, 2002

Answer to Question 1

• I. fork() -- although a lame case can be made for e, d is pretty much the exact definition of fork().
• II. exit() -- c.
• III. execve() -- b. This is the reason why you have to remember Dr. Plank's Cardinal Sin of Exec.
• IV. signal() -- a. Signal() simply registers the signal handler. It returns normally.
• V. setjmp() -- e. Setjump() will return once, and then will return as many times as longjmp is called on its buffer.
• VI. longjmp() -- c. If longjmp has an error, it will either seg fault, or send the processor into never-never land. It will never return.
• VII. pthread_create() -- a. It creates a new thread and returns.
• VIII. pthread_exit() -- c. This is like longjmp() -- if there's an error, you will seg fault, or maybe the process will die. However, it will never return.
• IX. pthread_mutex_lock() -- a. It may block, but it when it unblocks, it will return.

Grading