IPHONE TUTORIAL

HI !!! Techies!!!! In this Article I am writing about iPhone Interview Questions
and Answers. Now a days, this is mostly used Smart Phone and great device
by Apple Inc. I hope you people can brush up before attending technical
interview and clear your round with confidence.

1. What is iPhone?

Ans:  iPhone is 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. It also works as portable media player that resembles a video ipod. 

                             It has user interface that is built around the multi-touch screen including virtual keyboard. App store, which launched in the mid 2008 has over 1,00,000 applications with functionalities including  games,references, GPS navigation,advertising,television shows,films,reference,celebrities.

2.  What is iPhone App?

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

3. What are the requirements for developing iPhone Apps?

Ans:  Mac OS 10.5/10.6 and iPhone SDK(Software Development Kit 3.0/4.0)

iPhone SDK contains:

1. IDE to develop iPhone apps is Xcode(This tool is inbuilt in iPhone SDK)

2. Interface Builder(This is used to design GUI of Apps)

3. Instruments(This is used to check any memory leaks in our apps)

4.simulator(This is used to test our apps before deploying into real device)

4.  What is iPhone architecture?

Ans: It is similar to Mac OS x architecture

It acts as an intermediary between the iPhone and iPod hardware an the appearing applications on the screen. The user created applications never interact directly with the appropriate drivers, which protects the user applications from changes to the hardware.

5. Why iPhone apps are popular?

Ans:  
  iPhones are the market leaders in the smart phone segment. The iPhone has become a great device to surf internet, play games, interact with social networking and transact business.

                         Therefore, to give our business a whole new way of transacting business for millions of users.

6. How to install an iPhone application for testing?

Ans:  After being successfully registered in a developer's testing program,the developer sends you an archive containing two files:

1. The application
2. provisioning profile

7.  Where you can test apple iPhone apps if you don't have the device?

Ans:  IOS Simulator can be used to test mobile applications. Xcode tool that comes along with iOS SDK include  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.

8. How can an Operating System improve battery life while running an app?

Ans: An app is notified whenever the OS moves the apps between foreground and background. The OS improves battery life while it bounds what your app can do in the background. This also improves the user experience with foreground app.

9. what are the popular apps of iPhone?

Ans: Social networking  - Face book
          drawing                  -  Doodle Buddy
            Pandora Radio    - radio on our iPhone
            restaurant reviews - Yelp

10. What is iPhone SDK?

Ans:  iPhone SDK is available with tools and interfaces needed for developing,installing and running custom native applications. Native applications are built using the iPhone OS's system frameworks and Objective-C- language and run directly on iPhone OS. Native applications are installed physically on presence or absence  of networks connection