论文介绍了在线考试系统的相关理论及技术背景，针对系统的功能特点，使用了ASP.NET 技术，采用了面向对象的开发方法和流行的三层体系结构，对题库设计理论和组卷算法进行了探讨，并详细说明了系统设计与实现的过程。本文设计的在线考试系统具有通用性、良好的可扩展性和安全性、并易于维护等优点，能满足目前的在线考试需求。-This　thesis　introduces　some　relative　theories　and　technological　background　of　online exam systems. Aiming at the characteristics of functions, the system makes use of ASP.NET and　adopts　object-oriented　methods　of　building　and　the　popular　three　layers　of　systemic structure.　It　also　probes　into　the　theory　of　designing　subjects　and　shows　the　detailed descr iption on how to design and realize the system. The　system　has　all-purpose　use,　good　expansion,　safety　and　maintainability　and　other

merits. And it can meet the needs of current online exams.