Your mentioning the duration of your engineering from 2006 to 2010 in place of 2005-2010 amounts to suppression of facts. As a matter of fact, suppression of material facts is considered a grave act misconduct. Now you have to explain to your employer that by mentioning duration from 2005-2010 to 2006-2010 you only wanted to record the duration of your active studies leading to completion of your engineering degree and not to derive any benefit, whatsoever. Beside, this does not make any material/ substantial difference so far your employment is concerned. You have to admit (not on record) and accept it as an inadvertant mistake which you will not repeat in future..
It depends how well you are able to sell your point.
Thanks for your response.
Definitely I will do the things whatever suggested by you.
but i am afraiding as till now for each and every employer , I put my duration 2006-2010 instead of 2005-2010 ,will university takes any action on this.Please suggest