I interviewed at WhatsApp in October 2013.
Interview Details – It was a phone interview while online coding was not used at the same time. There were no hard questions. Just some general questions about array, AVL trees and hashtables, basically why each data structure is used under certain circumstances and running times of important funcitons. Difference between UDP and TCP.
Interview Question – I was asked to find out what their website's port number is. Answer Question
Interviewed at WhatsApp
Interview Details – The interviewer was rude and terse. I had the feeling that we were both wasting our times. The interviewer was not helpful, asking vague questions and disliking all my answers. When I described a project I was working on, he straight up dismissed it as useless. For Pete's sake, I was a freshman!
Interview Question – Why would I want to use your app? Answer Question
I applied online and the process took 3+ weeks - interviewed at WhatsApp in January 2013.
Interview Details – 30 min phone interview was excellent. I was invited for an onsite interview for 2 hours I met three interviewers. First one was 45mins and we centered around Queue implementation. I think I got a blackout I did couple terrible mistakes. Second one was 30 minutes, interesting questions about how to design cache. Last one was 45 minute, I had to implement LRU cache (I did it well). Recruiter was unfriendly and dodn`t showed any respect to a candidate.
Interview Question – LRU cache, Queue Answer Question
The process took a day - interviewed at WhatsApp in August 2011.
Interview Details –
This is a YouWeb company. Company has a good product and very promising future.
The interview process start with a phone screening which is pretty common, then they have you onsite pretty soon.
In the one day onsite interview, you will need to talk with every ENG there. (it's 4~5 people.) Most of the time you orally answer the question or write some sudo code on the white board. Only one guy will ask you to finish a programming test on machine.
Most of the guy seems to be easy to work with. However, when comes to the offer, it's much lower then I expect and they didn't want to spend time to negotiate with you, just keep telling you this is the only startup that will have a big success and if you go somewhere else, it won't be any better and you are making the wrong decision. Because of that, I feel like these are not the people I would like to work with and I go somewhere else.
Interview Question – String reverse. Tree(data structure) related question. Answer Question
I applied online and the process took a day - interviewed at WhatsApp in February 2012.
Interview Details – Nice interview - went over my resume - talked about server / C programming. Talked about their product a lot and tried to judge what I could do for the company. talked about my prjects - malloc / proxy . Socket programming.
Interview Question – What is the comparison between hashmap and a tree Answer Question
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