This is not an answer to the interview question but rather my response to your feedback about the entire interview process. I had the exact same experience, word by word as I read your response it just felt as if you wrote it on my behalf. Every single thing mentioned here is true. Entire process took nearly 3 months for me, was contacted by a recruiter just before the onsite interview and my flights were booked 2 days prior since the recruiter herself didn't know how to setup a travel record for an interview candidate. I heard almost 4 weeks after my onsite interview. I had applied couple years ago for a summer internship position and they replied to me 8.5 weeks after my final interview (with a negative response) despite of week by week followups and assurances that I had already cleared my interviews. Overall, again, very impersonal and to an extent unprofessional.