Explain place holder constraint
Explain which all events will perform an ios application in background
What are ios protocols?
Explain me what is fast enumeration?
What is background mode in ios?
Define cocoa?
What is synchronous web request and asynchronous ?
What is uiviewcontroller in ios?
Define 'copy' keyword?
What is autorealease pool?
What is the difference between atomic and nonatomic properties?
Which object manage the presentation of app's content on the screen?
Explain the steps involved in submitting the App to App-Store in iOS operating system?