C FIFO Queue

I was looking up info on implementing a FIFO queue in C and came across this code from a published book: http://www.cs.sunysb.edu/~skiena/392/programs/queue.c

Isn't this thing going to fail after you've queued QUEUESIZE times, regardless of dequeuing?

How do you pronounce ``deque''?

1) Deck
2) Deck-wee
3) De-cue (faggot)
4) Da-kway