I am pretty sure the questions are multiple choice. And there used to be a load of questions that involved one way streets in Belize city!
I believe that these days you can actually get a Belize drivers license that is limited to golf cart driving only.
If you wife has never had a license before she will need to make the application for a learners permit and then have that permit for 30 days before she qualifies to take the test. (This is how it was a few years ago when my daughter got her license.)