It's very useful, but I think it's different for ea country, in my case (Mexico), I got two first interviews, one with HR and the other with HR management, and then, they sent me several cases in an excel sheet to solve, I sent them the information, and they sent them, I guess to the firm or higher management, looks like my cases were good because today I got my 3rd interview, so I hope I do well.
@diegocarmona2640