Hiring process includes several round.
The very First consists of One on One with the HR where they gauge you on your communication skills and check you on personality grounds.
The second round consists of technical analysis where in your are asked about basic networking concepts, Database concepts, and your programming skills.
The third round is a grilling session where in you will have your group discussion or one on one with one of the managers or Leads. You would be asked about your dreams and hopes with the company and where would you stand in couple of years from now.
***No matter what, if you know or do not know the answer to few of the questions, Being confident is the secret.*** If you are confident enough to answer something and justify your answer, you are in.
**Show some excitement for the work that is being offered to you, makes the employer feel happy and gives him a confidence that you may be the right choice.***