iOS Interview Questions and Answers

Ques 11. What are the methods to achieve concurrency in iOS?

The methods to achieve concurrency are:

• Dispatch queues
• Threads
• Operation Queues

Ques 12. Define Cocoa/Cocoa touch.

It is used for building software codes to run on iOS for the iPad and iPhone. Cocoa Touch is written in the objective-C language and has a different set of graphical control elements to Cocoa.

Ques 13. Explain the object.

Objects are mainly the variables that are of class types. It can be a function, method, data structure, or variable.

Ques 14. Which framework is used to construct the application’s user interface?

UIKIT framework. It renders drawing models, windows, event handling, and views.

Ques 15. What is iBeacon?

iBeacon enables mobile apps to listen to signals from beacons in the physical world and respond accordingly. It comprises two parts: a broadcaster and a receiver.