IOS Interview Questions

1. What is iOS?
Ans. It is an operating system used in mobile devices manufactured by Apple Inc.

2. Who is the father of iOS?
Ans. Scott Forstall

3. Which programming language is used to develop iOS applications?
Ans. Objective C and C.

4. Which JSON framework is used in iOS?
Ans SBJson framework is used by iOS.

5. What are the tools required to develop iOS applications?
Ans. Intel-based Macintosh computer and iOS SDK.

6. Who invented Objective-C?
Ans. Broad cox and Tom love

7. How to store data locally in the iPhone?
Ans. Plist
         NSUserDefaults
         SQLite
         CoreData

8. What are the app states in iOS?
Ans. 1. Not running State
         2. Inactive State
         3. Active State
         4. Background State
         5. Suspended State

9. How many bytes we can send to apple push-notification server?
Ans. 256 bytes

10. Does iOS support multi-tasking?
Ans. iOS 4 and above supports multitasking.