At first there was an online selection round where the task was related to API calls and base64 decoding with some permutations. 35 out of 1400 (approx) people were called for an onsite test based on the results of round 1. In round 2, there were some basic analytical and math questions and 3 programming questions. First one was basic implementation, second one was dfs/recursion and 3rd was related to API calls, JSON, timers, wait, sleep etc. which I was not familiar with at all.