Senior Mobile Engineer Interview Questions

215 senior mobile engineer interview questions shared by candidates

I was provided with a laptop and was asked to create a simple app that displays a list of items and allows to search them. I was only allowed to use Apple documentation. I was interviewed by two guys and both were not very encouraging. At the end of the hour I said that I don’t think either of us enjoyed the format and wanted to go home but we proceeded with the second question. I was give a magic map that does all the operation O(1) and was asked to implement a function that returns a random element from the map. The tricky part is that it has to be uniformly distributed based on values. i.e. given map that has values 1,1,2,3,4,4,4 number 4 is 3 times more likely to be returned than 3 and 1 two times more likely to be returned than 3. I did pretty well but felt like the two interviewers were not very helpful. I wanted to go home again but instead another intern took me for coffee. The guy was from Germany and we had a nice chat. We toured the office and I was shown all the cool benifits they have like free snacks and a catered lunch. The office looked like a cramped aquarium with engineers sitting so close to each other that their shoulders were almost touching. After the tour I was told that I can go home now. It was pretty clear from the first interview that I was not a good fit for the company since I was not excited to demonstrate my super-coder abilities so I was not even sure why was I kept there for so long.
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Senior Mobile Engineer

Interviewed at Wealthfront

4.2
Jun 21, 2019

I was provided with a laptop and was asked to create a simple app that displays a list of items and allows to search them. I was only allowed to use Apple documentation. I was interviewed by two guys and both were not very encouraging. At the end of the hour I said that I don’t think either of us enjoyed the format and wanted to go home but we proceeded with the second question. I was give a magic map that does all the operation O(1) and was asked to implement a function that returns a random element from the map. The tricky part is that it has to be uniformly distributed based on values. i.e. given map that has values 1,1,2,3,4,4,4 number 4 is 3 times more likely to be returned than 3 and 1 two times more likely to be returned than 3. I did pretty well but felt like the two interviewers were not very helpful. I wanted to go home again but instead another intern took me for coffee. The guy was from Germany and we had a nice chat. We toured the office and I was shown all the cool benifits they have like free snacks and a catered lunch. The office looked like a cramped aquarium with engineers sitting so close to each other that their shoulders were almost touching. After the tour I was told that I can go home now. It was pretty clear from the first interview that I was not a good fit for the company since I was not excited to demonstrate my super-coder abilities so I was not even sure why was I kept there for so long.

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