No OP, but when I ask people to solve an algorithmic problem, I don’t mean “regurgitate this algorithm from memory”, I mean “I give the candidate a plain english description of an algorithm and ask them to turn it into code” (eg “read this .txt file, for each word in the file, reverse the word, and print it to stdout”). This does a pretty good job of filtering out people who can’t write a `for` loop, which is a lot of people, even those with “senior” in their past job titles...