Research On Ajax-Based Technology Online Examination System

Today with the emerging of Web technology and Web application development, we also noted a number of problems that we can not be avoided with the development of Web applications. In particular, in certain specific circumstances, such problems are more prominent it is.It is enormous that Web-based online examination system constraints the network environment quality. In particular, the larger the online examination system is,there are more sorts of questions. For example: candidates landing system at the same time, taking the title when the page is very slow; the page refresh is running slow when candidates continue to answer; candidates answer submit simultaneously to the server after finishing which could not be submitted. Faced the contradiction between the limited network resources and the enormous needs of candidates, many organizations are working hard to improve the conditions of their own network, the purchase of high-performance network equipment, fund a network environment.That may be the best solution for well-funded institutions. However, if insufficient funds, we can not improve hardware, we can improve software performance, so that the hardware can make up for the problems brought about by lack of resources.Ajax technology is one of the technologies that we can try to use, due to its unique technical characteristics,for example don't need to refresh the pages.we can apply it in the online system, and then solve common problems in online exam system . Ajax-based technology online examination system can provide administrators and students more smoother operate interface, it is conveniece for administrator manage data bank and the candidates information;during Online examination,the candidates can feel more fluid. Draw title and answer questions are more quickly.When candidates answer, the answer can be automatically saved, avoided at the end of the examination, all candidates to submit papers at the same time brought the stress to the server.Implementation in this way, the candidates operating without any changes. The difference is the browser will transmit answer questions to the server asynchronous, and then stored in the database.This paper analyzes the shortcomings which exists online examination system, and use Ajax technology based on the B/S structure to improve. Complete Asynchronous Random pumping title automatically saved data, automatically prompt information, According to fuzzy mathematics theory and close to one-way close-degree theory, design a algorithm which keyword matching and keyword matching degrees closer. This systerm also taken into account security of landing. Provide more user-friendly, higher interactivity and higher response systerm for the users.