What are the subject that we must prepare for this exam?
Hii Kalpana.Please be specific about the exam you wish to know so that I could answer you accordingly
Almost in all engineering entrance exam Physics, Chemistry, and Mathematics are common besides this in some entrance exam English, Logical reasoning is also asked.
All the very best and good luck.
For Engineering entrances, PCM subjects are the mandatory subjects so you will have to prepare them all properly.
Good Luck!!!