Based On Xml Network Test System Design And Realization

With the fast development of the Internet, web-based teaching has gradually been acknowledged by more and more educators and becoming a major trend in modern education. At the same time, web-based teaching evaluation is playing its role to a greater and greater extent. Teaching evaluation can, on one hand, provide teachers with useful reference data and, on the other hand, guide students to have self-evaluation and to spot their shortcomings so as to improve their studies. At present, many studies on teaching evaluation center on teachers and how students' learning ability can be recognized through computer adaptive testing. However, this study looks into how web-based enhancing testing can improve students' learning.The testing system in this study is completely built on the structure of BS. Web-browser is adapted as the terminal of tests so as to accelerate development and to make multi-media questions possible through HTML. JSP is the language to develop. the system and the webpage server is Apache. Tomcat works as the container of JSP. For the purpose of speeding up the surfing of the website and its giving responses, a load-balance system is exploring for making several Tomcat servers work together to have a job done.Another issue about online testing is the building of a multi-media item bank. In order to develop a convincing testing system, no matter for CAT or for enhancing testing, a huge and comprehensive database has to be built first. This study brings up and performs the building of an XML+RDB item bank and the management of it. The same technique is exploited in the building of a multi-media item bank and its management. However, under normal circumstances, XML files cannot be edited easily. Therefore, a converting program is developed to convert test questions into their XML format. As for multi-media questions, MS Word and Macromedia Dreamweaver are adopted for the conversion. All questions in a test are displayed in the form of XML and then added into the item bank. When the teacher prepares a test paper, he can choose questions from the item bank and then re-generate them to be of an XML format file. XML parser will then parse the XML questions in the form of JAVA object. SAX parser is fast, handy and efficient and thus it is adapted by the system.The testing system in this study contains true-or-false questions, multiple-choice questions and fill-in-the-blank questions. Multiple-choice questions' choices are shuffled every time the paper appears. The purpose of the shuffling is to avoid students' repeating the answers from memory. As for blank filling, since there is not a set of standard answers, expert system is introduced to assist the marking process.In recent years, there are numerous studies done on web-based teaching but, due to the fact that the Internet is still a rather new technological medium, most of them are still notcomprehensive or conclusive enough. Teaching evaluation is of particular concerns since the traditional way of classroom lecturing has been revolutionized by web-based teaching. Furthermore, when teaching is conducted online, there must arise among teachers and scholars the question about learning evaluation.