If you are a CS student, the questions will be asked from DSA, OOPS, Computer Networks, Operating Systems, *DBMS*, and the programming language of your choice. You may be asked to write a code (simple one) on Arrays, Strings etc in your preferred programming language, and also one or two SQL queries. And next (the most important ), the questions will be asked from the project which you mention in your Introduction (so, make sure you have a thorough understanding of the project that you have mentioned in your resume)