Chartboost Software Engineer interview questions

I was contacted by a external recruiter for an opportunity at Chartboost. I had a call with the internal recruiter, then another call with who would be my lead, then a coding exercise and finally flew to SF for a on-site interview. The process itself was nice and I learned a lot through the process, the thing I didn't like it is how nice their hr members where at the beginning, always with nice words. When I went on-site they promised to get back to me the next day, no matter the result of the interview and that they will provide feedback so I can improve. The truth is that I never heard from them again, not even a polite email. I took a day off from work and flew from the other coast to SF just to have the interview with them, I think that, at least, I deserve a one-line email politely declining to continue through the process.

Had a chat with the recruiter, they were very well informed and then scheduled an interview pretty quickly. A general technical telephonic screen, with the interviewer explaining about the role and then we jumped into a coding problem in coder pad. The interviewer explain about the company and about their role in the company in a detailed fashion.