This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
If this isn't specified in your assignment it doesn't matter really. its what your tool will let you draw. Most tools support UML 2.0 anyways.
Besides, I'm sure you aren't going to loose marks if you can depict your solution in uml 1.x notation clearly.
Unthinking respect for authority is the greatest enemy of truth. -Albert Einstein, physicist, Nobel laureate (1879-1955)