The purpose of online examination system using ASP.NET is to take online test by students at any time from any part of the world in an efficient and systematic manner. It does not waste time on checking the paper manually it checks the paper online when he clicks the end test button the result will immediately display over the screen. The main aim of online examination system using ASP.NET and SQL Server give the result very fast. If the power goes between the examination, the examination will start from where he left the examination, it does not start examination from start (means from question no 1) this is the hallmark of this system. The students can give test according to their convenience and time from anywhere and there is no need of using extra thing like paper, pen etc.