Dear Yahid, NTA conducts JEE Mains which serves as an entrance examination for admission into BE/B.Tech programmes in all of the IIITs, NITs and CFTIs. JEE Advanced scores are considered for IITs. So as is the procedure, JEE Mains score will be considered for 4 year B.Tech programme of ECE and CSE. There are other entries as well. You can check that at their official page at: http://ugadmissions.iiit.ac.in/index.html#