It depends on the type of candidate you hope to attract. If someone is applying for a lot of positions at once, an up front homework problem can be seen as unr

It depends on the type of candidate you hope to attract. If someone is applying for a lot of positions at once, an up front homework problem can be seen as unreasonable before even a basic semblance of role compatibility is established. Why not offer it as a HW problem after a resume and phone screen?