Dear Ali, TNEA is not an entrance exam. It is a counelling provess for admission into courses in Anna University. The admissions are based on TNEA counselling that will be held tentatively in the 1st week of May. This is the process of admission for 563 participating Institutions for Engineering and Technology courses. You need to register online for admission and the merit list will be prepared by the marks scored in your highest qualification in 10+2. Once the merit list is prepared, you will have to get your requested  documents verified at the suggested facilitation centre. Post that the counselling process will happen and choice filling process will begin. For instances of tie, once you register you will be given a 10 digit random number too. Please check this official website to check the cut off trends for any college that you want. http://cutoff.annauniversitycounselling.com/