I have a technical interview next week and I don't have much information about it. The only thing I would like to know is whether it is a whiteboard coding interview or just some general technical questions about CS, since I have experienced many other technical interviews which did not ask me to code at all. I just want to know is it OK to ask the recruiter whether it is a whiteboard coding interview or not.
Just drop the recruiter an email and ask if you could have "some details on the format of the interview" so that you can prepare properly.
Nobody is going to raise any eyebrows over this.