Grab Senior Android Developer interview questions

The interview process is not at all streamlined. I had a Codility round, followed by 2 technical rounds with Android Engineer, followed by one final round with Engineering Manager and it took 2 months after me following up with the Grab team. Not that all, I dint hear from Grab for 2 more months and then got another mail that I have another final round of interview with Engineering Manager. After this round, I again had to follow up asking the result and got an email that they have decided not to proceed. After 5 months, me following up with the team multiple times and 2 final rounds which were preceded by multiple technical rounds, is total waste of energy and time. I do not understand why do they send an email of final round followed by another email of another final round. I felt second final round was conducted just to reject me. During the entire process I had conversations with multiple HR's and each was not aware of the previous conversations. I hope they streamline the process and inform the candidates in advance of number of rounds.

Disappointed. Pathetic interview experience. Now before you assume my feelings are based on fact that i was rejected, i got offer from Microsoft, Amazon and Olx in same week. Selection and rejection are part of interview process but its the interaction that people remember. Had 3 rounds 1 Skype and 2 F-F. Basic android related and coding qs in skype round. 1st F-F two coding questions of medium difficulty. Solved but guy was unable to understand the solution despite me explaining solution with 4-5 examples. Finally he drew one example of BST and lol it was invalid BST. I pointed that out and guy started feeling embarrassed and this was the reason for rejection. Next round was just a formality with one of junior developer asking random android and java related questions. No introduction happened in any of the round. I thank them that they rejected me :)