Tip 1 : Prepare for Aptitude Questions well since most companies have aptitude questions in the screening round. So you can proceed with further rounds only when you are well versed with Aptitude
Tip 2 : Be good with at least one programming language. Does not matter which language it is. It can be Java, C, C++, Python or any other language. Most of the coding rounds will be on websites which support multiple programming languages. Java and C are the languages which will be supported everywhere.
Tip 3 : Be prepared with at least the basics of various subjects. For CS students, these subjects could be Operating System, OOPS, Data Structures and Algorithms. Most of the interviewers will check if your basics are clear. Advanced topics are required only for few companies.
Tip 4 : If you don't know the answer to a particular question, then be honest and let me know that you are not aware of that topic instead of making something up. Most of the interviewers have 10+ years of experience and they can easily make out if you know a topic or are just making something up.
Tip 5 : If you have completed an internship, then probably your interview would be about your experience and the projects done at the internship. Be sure to state your experience and your contributions clearly.
Tip 6 : Projects are an important topic for the interview. Before the interviews, revise the projects you had completed or are working on currently. The projects need not be some external projects. These can be academic and final year projects. Make sure you know everything about the project.