A NOVEL WEB-BASED ONLINE EXAMINATION SYSTEM FOR
COMPUTER SCIENCE EDUCATION
Yuan Zhenming1, Zhang Liang2, Zhan Guohua3
Abstract – Web-bad Examination System is an effective solution for mass education evaluation. We have developed a novel online examination system bad on a Browr/Server framework which carries out the examination and auto-grading for objective questions and operating questions, such as programming, operating Microsoft Windows, editing Microsoft Word, Excel and PowerPoint, etc. It has been successfully applied to the distance evaluation of basic operating skills of computer science, such as the cour of computer skills in Universities and the nationwide examination for the high school graduates in Zhejiang Province, China.Index Terms – Examination system, Auto-grading system, Web-bad, DCOM.
1. WEB-BASED ONLINE EXAMINATION SYSTEM
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1.1 The aim of the examination system
As a universal examination system for the education of basic computer operation, it must meet the following requirements:digin
1. A reasonable question storage, which must conform to the general outline of the exam.
2. A practical interface. There are two types of exam interfaces. One is the simulation, the other is the actual environment. The cond scheme will give the student computer skills.
3. A range of question types , such as objective questions, operating questions, design questions, information retrieval, group testing, etc
4. A safety and reliable examination system.
quarter的音标1.2 The components of WOES
modernizeThe Web bad Online Examination System (WOES) is a multi-layer system which is compod of the Web Server, Databa Server, WOES middleware Server, WOES client
module and Browr, such as Internet Explorer. In this system, we u the Internet Information Server 4.0(IIS) as the Web Server, the Databa Server is Microsoft SQL Server 7.0.
The kernel of WOES is the WOES middleware Serve and the WOES client module, which is designed according to Microsoft DCOM standards. DCOM is the binary COM object’s extension jointing LAN, WAN and Internet, which can instance and bind objects over different network. It is an advanced network protocol ud to cooperate with COM bad components of two process in different locations. The WOES middleware Server is a rver-side component The WOES middleware Server is a rver-side component providing communication interfaces between WOES clients and the Web Server or Databa Server. The WOES client is a client-side component, which is called by the Browr to control the client computer and submit or receive information from the WOES Server. This technology guarantees the flexibility and the potential for extension of the test system. In addition, it allows access to local files, whereas in conventional systems, the IE curity prevents such access.江水又东径西陵峡
纳达尔世界第一1.3 The key technologies of WOES
hydrogeology1. A ur-friendly interface
We u browr as our ur’s interface. The Browr interface has a uniform and consistent ur interface. Almost everyone is able to u it skillfully. Therefore it can eliminate the differences of various exam systems and guarantee a fair test.
2. Simplified system maintenance
Since the system is bad on Browr/Server architecture, the teacher can update the system or the question databa o examine the student’s databa only in Server. It is not necessary to update the client system as the Client/Server must do.
3. Central examination management
不离不弃的英文
Profiting from the central controlled system, the teacher can easily control the examination process, such as the beginning and end of the exam, collecting the answers and monitoring the students’ conditions on the teacher’s screen.
4. Security
The most vere difficulty which the B/S bad system faces is curity, becau in principle the web-bad examination system can be accesd on the Internet or WAN in a city.
All the questions, materials and answers are transmitted in bits stream format after encoding, not in file format. It can ensure not only curity in the transmission process, but also protect from invasion.
When one student starts his test, the system will distribute him a password produced according to his client’s hardware and operation system environment. It can prevent cribbers to login from other clients imitating this student.
The newest method to prevent the distant student from leaving the client or is making u of face detection and recognition technology. Before the start of the exam, the student is asked to sit in front of the computer camera, which can monitor the whole scene. Then th
e system will automatically recognize the student’s face and his identification. As soon as the validation is performed, the student must stay in front of the camera until the exam is finished.
