Joint Entrance Examination(JEE) is an engineering entrance examination conducted for admission to various engineering collages in India.It is constituted by two different examinations- JEE Main and JEE Advanced. The exams are of the objectives pattern. JEE Advanced is regarded internationally as one of the most challenging undergraduate admission tests.
In 2012, the government-run Central Board of Secondary Education (CBSE) that earlier conducted the AIEEE,announced the JEE that replaced the AIEEE and IIT-JEE. The JEE-Main, which replaced AIEEE, is for admission to the National Institute of Technology(NITs), Indian Institute of Information Technology (IITs), and some other collages designed as "Centrally Funded Technical Institutes (CFTIs)". The JEE-Advanced, which replaces IIT-JEE, is for admission to the Indian Institutes of technology (IITs).Only the students selected in JEE-Mains are eligible for appearing in JEE Advanced. Selection in advanced paper gives chance to get admission in IIT collages.
There are some institutes like the Indian Institutes of Science Education and Research (IISERs), Rajiv Gandhi Institute of Petroleum Technology, and the Indian Institute of Science which use the score obtained in JEE Advanced as the basis for admission. These are not participating institutes of central IIT JEE Advanced counselling of which all IITs are members. Any student who takes admission to IITs cannot appear for the JEE-Advanced exam in the next year, but the same is not the case with IISc, IISER, RGIPT and other Institutes as these Institutes only use JEE Advanced score for admission.