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5,579 ios software engineer interview questions shared by candidates

1. Blocks vs Closures, why do apple implemented closures 2. Notification vs Delegates 3. NSURLConnection vs NSSession 4. Autolayout and size classes 5. Optional chaining 6. Retain cyles 7. Swift 2.0 vs Swift 3.0 8. How does video player work...two types to design it: AVPlayer and MPMoviePlayer 9. Blocks vs NSthread vs GCD 10. Reload only particular cell of table view 11. *App life cycle of iOS, view life cycle 12. Weak vs Strong 13. Shared instance 14. In app purchase 15. Favourite project
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IOS Software Developer

Interviewed at TIAA

3.7★
Sep 8, 2017

1. Blocks vs Closures, why do apple implemented closures 2. Notification vs Delegates 3. NSURLConnection vs NSSession 4. Autolayout and size classes 5. Optional chaining 6. Retain cyles 7. Swift 2.0 vs Swift 3.0 8. How does video player work...two types to design it: AVPlayer and MPMoviePlayer 9. Blocks vs NSthread vs GCD 10. Reload only particular cell of table view 11. *App life cycle of iOS, view life cycle 12. Weak vs Strong 13. Shared instance 14. In app purchase 15. Favourite project

The technical questions covered a wide range of areas which I appreciated. The areas included object oriented design, architecture design, problem-solving/algorithms, objective-c (blocks, view controllers, etc.), and mobile specific questions. The most difficult question I was asked was to design a document upload/fetcher system for mobile (kinda like dropbox for the iphone). The difficulty was really in all the details of the problem (caching, database modeling, security, sessions, etc). Algorithm questions ranged from binary tree search questions to array pattern searching. The most unexpected question was the interviewer gave me a stream of digits and asked me to find the pattern. I got really stumped on this problem, it was my last interview of the day and I just blanked out. I guess I did well enough throughout the day because I got the job. By no means an easy interview, but not extremely hard, I was extremely well prepared as I had been interviewing for a while. Id say its on the average to difficult scale, if you are bad at architecting systems then this interview would have been HIGH diff.
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Mobile Software Engineer (IOS SDK and App Dev)

Interviewed at eBay

3.9★
Mar 13, 2014

The technical questions covered a wide range of areas which I appreciated. The areas included object oriented design, architecture design, problem-solving/algorithms, objective-c (blocks, view controllers, etc.), and mobile specific questions. The most difficult question I was asked was to design a document upload/fetcher system for mobile (kinda like dropbox for the iphone). The difficulty was really in all the details of the problem (caching, database modeling, security, sessions, etc). Algorithm questions ranged from binary tree search questions to array pattern searching. The most unexpected question was the interviewer gave me a stream of digits and asked me to find the pattern. I got really stumped on this problem, it was my last interview of the day and I just blanked out. I guess I did well enough throughout the day because I got the job. By no means an easy interview, but not extremely hard, I was extremely well prepared as I had been interviewing for a while. Id say its on the average to difficult scale, if you are bad at architecting systems then this interview would have been HIGH diff.

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