Digital Minds (India) interview questions

Conducted one technical round for 5 min just for formality and got response after 10 days as rejected even after answering all the questions. Donno why they conducted walkin's for 10 days .

Three Rounds: Round 1: (Face to face) Technical round, basic questions interview questions by senior developer. Round 2: (Skype call) Technical round by senior manager and in depth concept questions Round 3: Salary discussion Note: Concentrate on, 1. Background tasks (NSUrlSession) 2. NSOperationQueue 3. Thread and GCD concepts 4. Difference between NSArray and NSSet 5. APNS flow 6. Challenging task faced and how was it handled 7. Synchronous and Asynchronous calls 8. Database is important (SQLite and coredata) 9. Animations 10. Storyboard and auto layouts