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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.
  • 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
Whats the difference between frame and bounds?

The frame of a view is the rectangle, expressed as a location (x,y) and size (width,height) relative to the superview it is contained within. The bounds of a view is the rectangle, expressed as a location (x,y) and size (width,height) relative to its own coordinate system (0,0).

3
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 Megapixel 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..

4
Whats a struct?

A struct is a special C data type that encapsulates other pieces of data into a single cohesive unit. Like an object, but built into C.

5
What is iphone OS?

iPhone OS runs on iPhone and iPod touch devices.
Hardware devices are managed by iPhone OS and provides the technologies needed for implementing native applications on the phone.
The OS ships with several system applications such as Mail, Safari, Phone, which provide standard services to the user.

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