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iOS Interview Questions And Answers Part 9

11/19/2014

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1.What are the ways to store data locally on iPhone ?
Answer:

Ans. We can store data locally in iOS devices through:

          1.  Plist.
          2.  NSUserDefaults.
          3.  SQLite.
          4.  CoreData.
2. What is advantage of categories?
What is difference between implementing a category and inheritance?

Answer:


 You can add method to existing class even to that class whose source is not available to you.

You can extend functionality of a class without subclassing. 

Read:
Most Important iPhone interview Questions and Answers

3. What is the difference between @interface and @implementation in iOS?
Answer:

@interface 
It’s a keyword used to declare the Class.

@implementation 
It’s a keyword used to define the Class.


Read:
Some important points About View Controller.


4.Which JSON framework is supported by iOS?
Answer:

 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.

From iOS 5 Onwards we are using NSJSONSerialization inherited from NSObject Base class.


Read:
iPhone Core Animation - Drawing a Circle
iOS Interview Questions with Answers part3

5. What is the purpose of UIWindow object?
Answer:

 The presentation of one or more views on a screen is coordinated by UIWindow object.


Read:
Top 5 Frequently Asked iOS Interview Questions And Answers.
Swift Interview Questions And Answers part 1
An Introduction To The Swift Programming Language
​
Swift 2 Tutorial Part 2: Basics

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I am Jitendra Gochhayat,an iOS Developer,Designer,blogger,
​from Odisha,India.
I write about ​​​blog tips and,
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