My job interviews in the 80s and 90s (college summer jobs, or the one time a company tried to get me to leave college for a job) had no whiteboard-coding-style technical skills components, aside from demos of software I'd written and general discussions of implementation details.
One job I interviewed for was at Davinci Email. This was probably 1990-ish? They made a LAN email product that ran on top of Novell NetWare. There were a couple of hours of general interviews, including a lunch on-site. The last interview was with someone very technical, who had printed out a few pages of listings of the obfuscated C contest. He asked me to go through them and tell him what each program would output. I did not get the job.