That's the kind of thing I'd be fairly happy with as an applicant. One swift interview process I did included a single short page of code and the invitation to

That's the kind of thing I'd be fairly happy with as an applicant. One swift interview process I did included a single short page of code and the invitation to (with pen and paper) review it; I was given some time to think about it on my own and then to talk it over with the technical interviewer. I liked that one and they had what I thought was an above average quality of developer when I joined. Anecdotal but interesting.