Test and quizzes created by the instructor offer a variety of question types.
There is also a survey tool (generally not a graded item) and a Pool Manager, where banks of questions can be stored for use in a test.
Additionally, some publishers have test banks that can be exported to Blackboard and there are third party tools (i.e. Respondus and BYU Test Generator) that can be used to help facilitate test creation.
Questions Types (Videos)