基于SaaS模式的分布式在线考试系统设计

Design of distributed online examination system based on SaaS mode

纸质考试命题组卷以人工为主,试卷知识点、考题类型等组卷因素需要人为把控,存在组卷效率低下的弊端。设计基于SaaS模式的分布式在线考试系统,系统核心业务中的题库管理模块构建自身属性的考试题库,学生登入系统后在考试模块中选取考试科目,题库管理模块根据学生选取的科目,在题库里采用基于改进遗传算法的智能组卷算法组卷后返回至考生页面,考试后学生和老师可在信息查询统计模块中查询成绩。实验结果表明,所设计系统组卷耗时为9.35ms,组卷成功率高达100%,组卷效率与组卷质量较高;和同类型考试系统相比,具有响应速度快、承压能力好的优势,得到多数考试机构的认可。

The question setting and test composition in paper examination are mainly manual,and the test paper composition factors such as knowledge points and examination question type of test papers need to be artificially controlled,resulting in the disadvantage of low test paper composition efficiency. Therefore,a distributed online examination system based on the SaaS mode is designed. The examination question database management module in the core service of the system is used to build the examination question database with its own attribute. Students select the examination subject in the examination module after login into the system. In accordance to the subjects selected by students,test paper composition is conducted in the examination question database by using the intelligent test paper composition algorithm based on the improved genetic algorithm,after which the student page is returned. Students and teachers query the results in the information query and statistic module after the examination. The experimental results show that the designed system has the time consumption of 9.35 ms and a success rate of 100% for the test paper composition,and high test paper composition efficiency and quality;and in comparison with other examination systems of the same type,the designed system has the advantages of faster response speed and better pressure-bearing ability, which is accepted by most examination institutions.