Ran into one where it demanded I choose from a drop-down list, e.g. "What was your first pet" had "dog", "cat", "hamster", "gerbil", etc. I recall the list having a scrollbar, but there was not even enough choices for eight bits worth of entropy.

Oh, and they referred to these security questions as "2FA."

Imagine the site complaining that your answer has "too much entropy" to be correct...