hello sir,i m a BE 4th sem stndt,i m suppose to give UPSC exam and want to become an good IAS officer so wht should i do at this level?

A through awareness of your own subject, both in theory and application, as well as whatever is going around in India and the world.Also, you are expected to add your own inputsto the current affairs.So read and discuss a lot from different angles, so that your span of vision broadens.

In addition to what Arvind ji has very rightly told to you, I would add that if your question is directed towards becomming a good IAS officer then all I would say is that you must apply yourself to the job responsibilities (on becoming an IAS) with truth, conviction and a great degree of tactfullne