The recruiter/interview scheduler is very unprofessional. I gave my availability on Monday, and they literally sent out an interview invite on Saturday to schedule interviews for the following Monday. I'm so surprised to get an interview invite on the weekend! But the most funny part is they canceled the interview Sunday evening suddenly with a short email: "Hi, we have to cancel your interview." This is so unprofessional! I have never gone through such a rude and unprofessional interview process!

Go through your background/resume and ask some technical questions. For example, how did you use multithreading in your project? And ask some SQL questions.