A close friend contacted me for interview tips at my current company. I joined the company very recently and interview questions are still fresh memories. I suspect my friend is going to want to know the questions. I don't really want to talk to him because disclosing anything useful to him would potentially be doing my team a disservice and also would substantially discredit his competency if people find out about our communication. He is actually quite good and I believe he will do well in the interview, although he might not be as confident in himself as I am. I honestly think the downside for him if we talk and prep him is probably greater than the upside (should people on my team find out).
Any advice for handling this properly? Should I also disclose our relationship with the company upfront before the interview process starts?