Here are a few articles that will be incredibly helpful in getting you acquainted with ISQs.
Institution Specific Question (ISQ): Questions written by your institution which pertain specifically to your institution. These are optional questions that you enter into our system. They will show at the end of the assessment.
How to Enter Institution Specific Questions (ISQs)
How to Write Institution Specific Questions (ISQs)
Types of Questions (With Definitions and Examples)