Hi Niraj kushwaha,

Most of the companies put a starting percentage to allow students for an interview they only check your MCA percentage and 10th and 12th percentage is not that compulsory 

When you are going for your placement be prepare yourself well so it should be attract your presence , body language is compulsory and the way  your expressing yourself should be good

If you have skills and knowledge in a particular field is that more enough then you are marks , just be confident whatever you are speaking on .

All the best