The iPad Edition of "LockDown Browser" (available from iTunes) enables a student to use an iPad to take exams that require LockDown Browser. However, the instructor must first select a setting that permits the use of iPads for the exam.
An instructor should follow these steps to allow students to access an exam with the iPad Edition of LockDown Browser
A student should follow these steps to take an exam with the iPad Edition of LockDown Browser:
This information is from Respondus.com Knowledgebase.