Do I have to clear the cache on a computer between test sessions?

No, you do not need to clear the computer's cache between test sessions or between different students who may be testing on the same computer device. 

Student test answers are collected electronically by Questar every 60 seconds during the test session. The test questions are not stored on the computer device. 

Multiple students can use the same device during testing day as long as a student is individually logging in and out (i.e., submitting the test answers or pausing the test to log out) of a test session before a different student uses the same device for a new test session.