I have attended manipal entrance test and what I feels is that the score produced by them at the end of the exam is not accurate. can it happen like that

Ajai , it cannot happen because all marksheet is tested by Electronic Machine so there's is little chances to be an error. If you feels that score which has been sent to you by them with an error so, please check your Answer sheet again with provided Solutions by MIT Manipal. After all you think that in real there's an mistake then please contact their official Mail ID -they Will definitely reply to you.

Hope it will help you Ajai.
Best if Luck for your Great Future.