Hi sushikumar,
The various entrance exams  for the top most engineering colleges are as follows.


1) JEE MAIN


2)JEE ADVANCE


3) BITSAT- Birla institute of technology and science admission test


4) VITEEE- Vellore institute of technology engineering entrance examination


5) WBJEE- west Bengal Joint entrance test


6)MHTCET- Maharastra common entrance test


7) AP EMCET - Andhra Pradesh


8) KCET-  Karnataka common entrance test


9) UPSEE- Uttar Pradesh state entrance exam


10) KIITEE- Kalinga Institute of industrial technology entrance exam


Goodluck


Hope this helps.

Jee mains and advanced