iOS INTERVIEW QUESTIONS AND ANSWERS

iOS MOST ASKED Job Interview Questions. Read iOS Interview Questions and Answers for Experienced, Freshers PDF Download.

Read iOS Questions and Answers for Interview

Assume that an app is not in foreground but is still executing code. In which state will it be in?View Answer
Which JSON framework is supported by iOS?View Answer
How can you respond to state transitions on your app?View Answer
What are the important delegate methods of NSXML parser?View Answer
What is Automatic Reference Counting (ARC) ?View Answer
What is the purpose of UIWindow object?View Answer
Apart from incorporating views and controls, what else an app can incorporate?View Answer
Assume that system is running low on memory. What can system do for suspended apps?View Answer
Which object is create by UIApplicationMain function at app launch time?View Answer
How do you change the content of your app in order to change the views displayed in the corresponding window?View Answer
What are the location services?View Answer
What is delegate?View Answer
What is the use of controller object UIApplication?View Answer
Assume that your app is running in the foreground but is currently not receiving events. In which sate it would be in?View Answer
Which object manage the presentation of app’s content on the screen?View Answer
How is the app delegate is declared by Xcode project templates?View Answer
What are the popular apps of iPhone?View Answer
What is difference between NSNotification and delegate?View Answer
What’s the difference between frame and bounds?View Answer
Describe the functionality of accelerometer of an iPhone ?View Answer
Who calls the main function of you app during the app launch cycle?View Answer
How many bytes we can send to apple push notification server.View Answer
What are the requirements for developing iPhone Apps?View Answer
What is iPhone architecture?View Answer
Whats fast enumeration?View Answer
Difference between categories and extensions?View Answer
Why an app on iOS device behaves differently when running in foreground than in background?View Answer
Introduction to iphone application Development?View Answer
What are the tools required to develop iOS applications?View Answer
What is iPhone OS?View Answer
When an app is said to be in active state?View Answer
Difference between COCOA, COCOA touch and objective C?View Answer
Why iPhone apps are popular?View Answer
Multitasking support is available from which version?View Answer
What are the ways to store data localy on iPhone device?View Answer
What is iPhone reference library?View Answer
When an app is said to be in not running state?View Answer
Difference between shallow copy and deep copy?View Answer
You wish to define your custom view. Which class will be subclassed?View Answer
Name the application thread from where UIKit classes should be used?View Answer
What happens if IApplication object does not handle an event?View Answer
What is iPhone reference library?View Answer
When to use NSMutableArray and when to use NSArray?View Answer
Does iOS support multitasking?View Answer
Types of parsers?View Answer
What is @dynamic and any place where it is used?View Answer
What is iPhone sdk?View Answer
Where can you test Apple iPhone apps if you don’t have the device?View Answer
Explain about the applications that can be used with iPhone?View Answer
What are KVO and KVC?View Answer
What is @implementation?View Answer
What is iPhone?View Answer
Which API is used to write test scripts that help in exercising the application’s user interface elements?View Answer
Flow of push notification?View Answer
What are layer objects and what do they represent?View Answer
What is @interface?View Answer
What is MVC ? MVC Architecture of iPhone App.View Answer
Which app specific objects store the app’s content?View Answer
Garbage collector in iPhone?View Answer
What are sensors in iPhone?View Answer
What is @synthesize?View Answer
What is nonatomic?View Answer
Which framework delivers event to custom object when app is in foreground?View Answer
Give example scenarios when an application goes into InActive state?View Answer
What are the delegate methods of MKMapView?View Answer
What is advantage of categories? What is difference between implementing a category and inheritance?View Answer
What is polymorphism?View Answer
Are document objects required for an application? What does they offer?View Answer
Which is the super class of all view controller objects?View Answer
How can an operating system improve battery life while running an app?View Answer
What are the features of iPhone 3gs?View Answer
What is an iPhone app?View Answer
What is push notification?View Answer