Answer:
Both are true
Step-by-step explanation:
An interview is a formal occasion where questions will be asked about who you said you are, its always a serious atmosphere which all depends on you, actually you can anticipate the type of questions you will be asked, but there are potential questions one should prepare for , so there really little you can do ,only prepare .
For the second statement ,yes you shouldn't treat your interviewer has your friend, friend is not a formal relationship relational ,am interview is a formal occasion you have to be serious with it If its a friendship occasion ,it shouldn't be called an interviews, so don't take your interviewers as a friend.