National Institute of Open Schooling has been working on the concept of On-Demand Examination (ODE) at Secondary Level since 2003 in the area of its feasibility and operationalisation. The novel concept of ODE is a great step in the direction of flexibility to the open and distance learning. This will make the total system of examination independent of the time frame and will help the student to take up the examinations as per their wish and preparation. The basic concept of On Demand Examination is that NIOS Student can walk into the examination center as and when he/she feel ready for the examination.

With the success of ODE at Secondary level, NIOS started the On-Demand Examination in Sr.Secondary also with 6 subject Hindi (301), Mathematics (311), Physics (312), Business Studies (319), Home Science (321) and Political Sc.(317) from October 2007.

Under the System of ODE, a set of question paper having defined number of items is generated randomly by the computer, out of the already developed question bank on the basis of question paper design and the blue print of the subject, as and when demanded.