OLA Cabs Interview Experience | Set 4 (For SDE 2)

I was recently interviewed for SDE 2 position at OlaCabs. Round 1 (around 1 hour) Design and implement a logging library. Preferred language was Java. - There can be multiple appenders - like file, network, db etc. Should be easy to add appenders. - Library should be easily configurable. - Message format should be configurable. - Logger should not add additional overhead. - Must log to all appenders simultaneously. Round 2 (around 1 hour) Discussion on the design and the code you have written in round 1. Was asked questions like concurrency handling etc. Round 3 (1 hour) - Application monitoring - how will you handle data coming from various applications? - Ola operates within city limits (a fixed area). How to determine a user is inside that area and then show him available cabs. (Simpler problem is how to determine whether a point is inside a ploygon or not). - Given an array containing 0,1,2. Sort them maintaining the order in which they were in the original array. Round 4(Managerial Round - 45 mins) Basic questions like - your strengths, weeknesses, best moment, worst moment, why want to change, why ola? Overall it was a good experience.