Timeline:
Applied: Late August 2019
Received OA: October 3, 2019
Finished OA: October 06, 2019
Invitation for final round : November 19, 2019
1 Final Round: November 27, 2019
Offer: December 4,2019

OA2: search in a sorted matrix and subtree problem

In my virtual interview the interviewer asked if I remember the questions that I had in my OA 2, how much approximate time it took me to solve each question, which was the more challenging one ?
Then I was asked to explain both the codes, no LP.
It lasted for about 15-20 mins.