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Thursday, 24 September 2015

76 Top iPhone Interview Questions and Answers

1. What is iPhone?
IPhone is a combination of internet and multimedia enabled smart phone developed by Apple Inc.IPhone functions as a camera phone, including text messaging, and visual voice mail. IPhone is a portable media player that resembles a video iPod It has user interface that is built around the multi-touch screen including virtual keyboard.

2.What is an iPhone app?
An iPhone app is a program that runs on our iPhone/iPod Touch. It enables us to ccomplish a certain task. They could be utility apps, games, enterprise apps, entertainment apps, apps to access our bank account etc.

3. Introduction to Iphone application Development?
In 2007, Apple entered the cellular phone business with the introduction of the iPhone, a multi-touch display cell phone, which also includes the features of iPod.

4. Multitasking support is available from which version?
iOS 4.0

5. How many bytes we can send to apple push notification server.
256bytes.

6. What are the features of iPhone 3gs?
Video: Videos can be edited, shared. High quality VGA video can be shot in portrait or landscape.
3 Mega pixel Camera: Still photos with greater quality can be taken
Voice control: It recognizes the names in contacts and recognizes the music on iPod.
Compass: iPhone 3GS has built-in digital compass, used to point the way.
Internet Tethering: Internet surfing can be done from anywhere. A 3G connection can be shared on Iphon3 with Mac notebook or laptop.

7. Why iPhone apps are popular?
Give our business a whole new way of transacting business for millions of users.
IPhones are the market leaders in the smart phone segment. The iPhone has become a great device to surf the internet, play games, interact with social networks and transact business.

8. Where can you test Apple iPhone apps if you don’t have the device?
iOS Simulator can be used to test mobile applications. Xcode tool that comes along with iOS SDK includes Xcode IDE as well as the iOS Simulator. Xcode also includes all required tools and frameworks for building iOS apps.  However, it is strongly recommended to test the app on the real device before publishing it.

9. Does iOS support multitasking? 
iOS 4 and above supports multi-tasking and allows apps to remain in the background until they are launched again or until they are terminated.

10. Which JSON framework is supported by iOS? 
SBJson framework is supported by iOS.  It is a JSON parser and generator for Objective-C. SBJson provides flexible APIs and additional control that makes JSON handling easier.


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