Based on my experience, it wouldn't matter unless the questions is specific to a certain language, e.g., C coding. For normal algorithm or ds questions , it would be ok to write in the language that you feel comfortable with. If you want to write in pseudo code, ask the interviewer before you do so. I can't see why he/she'd refuse your request. BTW, if you filled a form to evaluate your cs skills and you put a relatively high score with a certain language, you'd better be prepared for coding in