[regs]

You'd be surprised at what people will do to game an interview. I've had people give me the correct answer to a question I didn't ask (but from our list of questions) - clearly having gotten from someone else who had interviewed earlier.

Note that algorithms interviews are just one part of a larger inventory that one takes of a candidates, one dimension. Take home and/or whiteboard coding can be a part of that process as well, but each has its downsides.

What we look for, in particular, is methods that have a very low false positive rate. In person algorithm interviews, where the point is not the 'right' answer but hearing about how someone thinks are in that category. You can't really fake it.