In most of the companies after clearing online test and some other rounds, you will be called for interviews. These interviews may be technical or HR interviews. Based on your performance in technical round you are invited for HR interview round. In some companies there may be more than one round in technical interview. There may also be more than two round of interviews depending upon company as well as job role.
In technical interviews, interviewer may ask you questions based on skills that you have mentioned in your resume, questions from programming languages like c, cpp, java, python etc. Also they may ask you questions based on data structures and algorithms, your core subjects.
If you are a CS/IT student prepare your subjects like DBMS, operating system, computer networks etc.
If you are a non - CS/IT student please prepare some of your core subjects and basics questions related to your branch.
HR interview is basically done to check your communication skills and presentation skills. In this round interviewer may ask you some questions like tell me something about yourself, what are your strength and weaknesses, your goal, why do you want to join our company etc. For this round prepare some Frequently Asked Questions.