Hi,
Once you have cleared the written round, you'll be qualified for Technical and HR rounds. Both the rounds are going to be easy so be confident and feel like walking the ramp at ease.
Below is the probable questions for a Technical round:
1. Basics of C/C++/Dbms/Java
2. Difference between C and C++ has become a platitude/custom
3. Explaining end to end of your BTech Project and improvisation if any. ( This a must question and should be your an Ace winning answer so that the interviewer doesn't have any second thoughts in selecting you)
The interviewers do not generally make freshers write a chunk of code but make a habit of explaining everything with an example and prompting to even write anything if necessary.