I work for one of the big 5 in demand software companies to work for - originally I would do a live-programming question on Coderpad as part of a first round pass with candidates. I used a pretty basic question as sort of a fizzbuzz - build a Pascal's triangle. The amount of people who took the exact top sample direct from StackOverflow without even attempting to change anything or mask their cheating was astounding.

We've since adopted a better heuristic approach that more accurately reflects the day-to-day work and abandoned the smoke test, but as everyone knows, the most valuable resource any interviewer has is time - the more of that you can save, the better off you are.