This is a very good question and a very difficult area to navigate successfully. According to the regulations: Sec. 60-1.20 Compliance evaluations. (ii) An on-site review, conducted at the contractor's establishment to investigate unresolved problem areas identified in the AAP and supporting documentation during the desk audit, to verify that the contractor has implemented the AAP and has complied with those regulatory obligations not required to be included in the AAP, and to examine potential instances or issues of discrimination. An on-site review normally will involve an examination of the contractor's personnel and employment policies, inspection and copying of documents related to employment actions, and interviews with employees, supervisors, managers, hiring officials..." The regulations do not limit the OFCCP's authority to contact former employees or management, and in my experience, both when I was with the agency and since, they frequently do. The employer can ask for a copy of the interview questions, but I do not expect the agency would turn them over to anyone outside of the OFCCP. It is almost always best practice to have a representative present in any and all management interviews.
You can use this OFCCP audit checklist to ensure you're doing what is required to maintain OFCCP's regulations including VEVRAA, Section 503, and EO 11246. Or request a demo to streamline your compliance and recruiting efforts.