1)NOT verifying all options in multiple choice questions leads to selecting wrong option
2) escaping key terms like "SOME" , "ATMOST", "ATLEAST" , "ALWAYS " ,"NOT " ,"strongly supports" etc , so read the question two times
3)during calculation " not focusing on units like bytes , bits , km ,m ,mili ,micro etc"( mostly happens due to hurry)
4)not writing steps clearly which will help in rechecking .
5) overconfidence kills , so even if question is easy try to answer it with calm mind
6) not sleeping properly one day before exam : this is biggest mistake .
7)getting in panic mode by observing continuous run of 3-4 hard or lengthy questions.( this can be handled if you have practice of test series)
SOME SUGGESTIONS :
1) how to use rough book : https://www.youtube.com/watch?v=h9NsODo1mIY
2)during calculation write all necessary steps , do not skip
3) do not try to do " JAY MATA DI "(guessing answer) for multiple choice questions , it will down your rank if "MATA JI " is not happy with you :)
.......................................................ALL THE BEST FRIENDS ......................................................