Hello Shravani, 

The admission in class 11th is based on the score of the board exam of 10th class. Schools decide their criteria for admission in 11th class in various streams like science, commerce, humanities etc. Concern with the respective school or college for the admissions. Good luck. 

There is not any entrance exam that you have to go. It is a normal process as you take admission in any class. But this time you have to choose the subject you want study like commerce, science, biology, hindi, or physical education. And after that depending on your 10th class score you are alloted with the subject.