A flexible computer based assessment system that uses flash disk

In this paper we introduce the use of a Computer Based Assessment (CBA) system; discuss the functionality, usability and reliability of the system. The system has a simple and user-friendly interface, and it just executes a program on a stand-alone computer or on an online computer without changing hardware or software. It can be used for mid-term or final exam in small-scale for many courses. The teacher can change the question bank as his own idea by using word processing software. To avoid students copying each other, all the questions display in random sequence. The question files and the answer sheet file are encrypted for delivering, so it can reduce cheating. It is a helpful tool for teachers. It can also be used for student's self-assessment, as when they finish the assessment, the system may feedback the score immediately. The practice shows that the student is very interested in using the CBA system.