1. What happens if signal() on a condition variable that has no threads in its waiting list?

a) signal() has no effect

b) signal() waits until a thread joins the waiting list

(c) signal() returns right away, but then the next thread that calls wait() does not have to wait.

2. What is a spurious wakeup? Is it

a) when a call to wait() returns even though no call to signal() has occurred

b) a wakeup that is spurred by a pthread_cond_broadcast() call

c) the situation in which multiple wait() calls return because of a single signal() call.