Search for " Road Test tips" here in QL. It is very useful. I got my license in karwa after 4 attempts. Base on my experience it is really difficult to take a driving license at this time. I take short course although I am already driving before. It would give you a better odds.
You should wear Good Dress (Business Attire) will give you an edge. Before you get up at the car on road test. Look at the police directly and great him with a smile " Good Morning sir", You should adjust your center mirror, and side mirrors, everytime the police ask you to take left or right response to him " Ok or Yes Sir with a smile", after finished do not forget to give him " Thank you sir"