ZS Associates Decision Analytics Associate interview questions

I applied online and got invited to the Talview Assessment over a month later. The assessment consisted of an aptitude round of 45 minutes. After that was the PSDD round consisting of 8 questions. Following this, there is a recorded video interview round. The questions are on the screen and you are given 10 seconds to think and 3 minutes to answer. I was expecting guesstimates to be asked after reading some questions here. However, they only asked 5 behavioral questions. The last question (mentioned below) caught me off guard.

Online Mode of Interview where questions were based around guesstimates and the answers given during the case study round. Also, the entire experience was very good. Amongst the two guesstimates one was difficult and the other was rather easy.