In my opinion what matters is the way you depict yourself , you should be formal ,be yourself and with a positive attitude.You should ask yourself before going to the interview room that you have cleared the biggest milestone that is written portion out of 6-7k candidates,this will boost your morale and confidence.We pakistanis have a problem of exaggerating things up , do not do this , answer to the point , reply with a positive attitude and present the verbal material which is being asked.Focus on the question and give a simple answer which does not lead to misunderstanding and exaggeration of conversation.Do not try to make a fake accent , the interviewers are smart , they will catch you.Dont try to be a wana be, your tone should be clear.Thats it for now ,i`ll update this with more info because i am going to bed now.

P.s My brother is a CSP ,this is what he told me like 2-3 months back.


Regards
whj