There is a question bordering my mind is it possible to be denied based on 212(a)(6)(C)(i) Material Misrepresentation / Fraud Material by a consular and handed a 214b slip after an interview

Hello
I have a friend who had an interview 2yrs ago but was denied based for presenting a fake traveling experience though he was denied under section 214b because that was the paper given to him by the consular officer. We know it is now in is record for lieing.
There is this common advise you give here that even if someone as done something wrong in the past he shouldnt lie about it. Now my question is
1. Does it mean that when he gets another chance to be interviewed will he just start talking about that past or wait to be questioned about it before he talks
2. From your experience as anyone ever being granted visa even after lieing aout such thing or no one can ever gets a visa without applying for a waiver if he lies
3. Does he need a waiver even if he is seeking an immigrant visa even though he was denied based on 214b.pls just a clue because i know i will be redirected to the immigrant visa session
4. The thread for immigrant visa is closed on nairaland is there a way to work on somebody that can continue helping people on their immigrant question
Thanks for the good work you doing here