I dont quite recall if I was asked on UML of any of the patterns. But this is something that one would want to learn from understanding perspective. We do ask people to draw out diagrams of patterns that they know of. It brings lot of clarity.
SCJP, SCWCD, SCBCD, IBM OOAD-UML, SCEA
I hired a bunch of ninjas. The fridge is empty, but I can't find them to tell them the mission.