Northforge Innovations Software Developer C++ interview questions

Probably the worst interview I ever had.. I applied online.. They sent few quiz sheets to complete.. Around 60 questions altogeather.. I emailed them the solution within time.. Took me nearly 5 hours to answer those.. They didn't even acknowledge that they have received the answers.. I even called them up but no response e1 on phone.. At least an HR is expected to acknowledge your job application..