Hey there!

Well if are applying for an under graduate course in any sort of college across the country, you have to fulfill the required eligible criteria of that particular college.

The major criteria are like:

1- To pass 12th board with minimum qualifying marks

2- Students must have certain mandatory subjects in 12th boards like PCM for Engineering and PCM for Medical

3- Students have to appear college entrance exam which is conducted by the authority

Hence, you cannot get admission to any institute without having a score of that particular entrance exam until and unless you are taking admission through management quota.

Some of the entrance test are like:

1- JEE mains for admission in NITs, IIITs and GFTIs

2- JEE advance for IITs.

3- State CET for government colleges in respective state etc.

I hope this info will be useful!