Not writing because I didn't get any offer but they should consider these facts. Facebook you better fix Coderpad before you interview candidates. The first interview was pretty awesome, the interviewer was really great, helpful and responding to my questions all the time. But the second interviewer was horrible even though he is so experienced was horrible. Not responding to my questions, not clear with what he is asking, for my every question he has one answer "Leave it as it is". I wasted almost 7-10 min in finding out why output getting printed twice, finally found out that due to coderpad issue, main function was invoking twice. I completed 3 parts of a program and when 3 min left for an interview to over he asked me again one more question to complete and coderpad on his side got hanged, I tried to explain my approach but still he said his golden words: "Leave it as it is". You should really consider these things before proceeding any candidate interview.