In the eighties it was completely nonstandardized and depended heavily on each person you talked with. You would typically visit with a company for the day while they passed you around from person to person. One might have you code something on a whiteboard. Another might ask you a brain teaser. Someone would go through the experience on your resume. And another might ask you something like "how would you figure out the number of pixels needed to make this wall indistinguishable from a picture (i.e., retina display)" just to see how you think. Lunch was often where team fit was assessed.
1. https://github.com/peterfajdiga/karousel