those exist. except I think the one I did was an hour(? it was ten years ago). I got the interview, but that didn't go well, so I went to work elsewhere. they

those exist. except I think the one I did was an hour(? it was ten years ago). I got the interview, but that didn't go well, so I went to work elsewhere. they have part of the site that has lessons for developers: https://app.codility.com/programmers/ https://app.codility.com/programmers/ I haven't used it for a long time, but they also have contests with some small prizes: https://app.codility.com/programmers/challenges/ https://app.codility.com/programmers/challenges/