Objective C/iPhone/iPad/iOS Interview Questions
1. What is delegate?
2. What is protocol? Types off
protocols? By default Which type ?
3. What is the difference between
Delegate and Protocol?
4. What are categories?
5 . Difference b/w categories and
Extend?
6. Difference b/w categories and
Inheritance?
7. Is there over loading function in
object c?
8.How objective C supports overloading
and overriding ?
9. How OOPS Concept supports to
ObjectiveC?
10.What is MVC? How It’s supported to
objectiveC?
11.Explain the Application LifeCycle?
12.What is Protocol? Types of Protocols?
13. Is Synthesis required? What is the
Importance of it?
14 How
should you manage memory?
15. Delegate Methods?
16.What are the controls?
17.what is xib?
18.Waht is the difference b/w loadview
and viewdid load?
19. How to change one controller to
other controller?
20. How to change the Default
controller?
21. How to Provide Multiple options to
the user?
22.What are required delegates for Table
View?
23. Table View Delegate Methods?
24. How the memory allocated for table
view?
25.what are UI Text field methods?
26. Difference b/w simulator and Device?
27. Differences b/w IPAD And Iphone?
28. Features of 4.0version?
29. Difference B/w versions?
30. How you Customize the table view?
31. Difference B/w C,C++,ObjectiveC?
32. What is Garbage Collection How it’s
supported?
33. Difference b/w Copy and Retain?
34. Differences b/w Copy and Mutable
Copy?
35. Difference b/w Release and Auto Release?
36. What is the base class for all the classes?
37. What are Data Types? What is the
Default Data type?
38. What are Access Specifiers? What is
the Default Access Specifier?
39. Differences b/w String and NSString?
40. Array allocation is Contiguous ?
41. Differences b/w NSArray and NSMutable
Array?
42. What are the Design Patterns?
Design
Patterns :
- MVC
- Singleton :
A system only needs to
create one instance of a class, and that instance will be accessed throughout
the program. Examples would include objects needed for logging, communication,
database access, etc. You could pass such an instance from method to method, or
assign it to each object in the system. However, this adds a lot of unnecessary
complexity.
- Factory
design pattern :
The factory method
pattern is an object-oriented design pattern to implement the
concept of factories. Factory method Pattern is to
"Define an interface for creating an object, but let the subclasses decide
which class to instantiate.
43. What is singleton object? How it’s
supported?
44.
Instance method followed
by………………………
Member
variable
45. Instance method begins with?
-
46. Class method begins with?
+
47. @interface
Methods
define
48. @implementation
Define
methods are implemented
49. Default constructor syntax is?
-
(id) init.
50. What is the difference b/w
dismissmodelview control and presentviewmodel controller?
51. Which API’s are using in u r application?
API means frameworks like UIkit,
foundation, Core animation
52. What is the cocoa?
Object c framework called COCOA. The specific part of the framework used
for iPhone app development is called Cocoa Touch.
53 .What is the difference Between APPKit
and UIKit?
there is NO APPKit in iphone and there is no UIKit in Mac OS
54. What is diff between Get and Post
methods?
55. What is NSPredicate?
56. which class is used for sorting the objects in
array?
57. How to customize u r app in iphone?
Winterboard is an application that let you customize
your iPhone / iPod 2.0+.
58.
What is the Winterboard?
Winterboard allows you to customize
Springboard of your iphone. Using Winterboard you can change iPhone icons, customize applications, status bar graphics, iPhone dock graphics, install themes and change wallpapers
of your iPhone Springboard. You can even customize sounds on your iPhone. With
Winterboard you can theme almost everything that comes to your mind. Before
iPhone 2.0 there was Summerboard but Winterboard has replaced it since iPhone
2.0 and can even load themes of Summerboard.
59.
What is the springboard?
Springboard is the standard
application that manages the iOS (formerly iPhone OS) home screen.
60. Is it
support multiple inheritance? How it’s over come?
Not
supported
61. What is the memory management?
It
allocates and reallocates memory and find out memory leaks.
62. What is the ton?
Singletons are a class that only gets instantiated
once in your application’s run-time.
63. How many layers are there in iphone
sdk?
.cocoa
touch layer
Address
book UI
UIkit
.media
layer
.audio
toolbox
.audio
unit
.AV
foundation
.core
Audio
.core
graphics
.media
player
.open
GL ES
.quartz
Core
.core
service layer
.address
book
.core
foundation
.core
location
.foundation
.system
Configuration
.core
os layer
.CF
network
.security
.system
64. What is Parsing? Types of Parsing?
Differences b/w types?
65. How File Handling should be done?
66. Permanent Storage?
67. What is APP Delegate? Why It’s used?
68. How handling the Data Base? Which
Database your used?
69. Differences b/w SQLite and CoreData?
70. How Mapkit is used?
71. How change the Application Name?
72. What are the Frameworks you are
used?
73. Essences of Library File?
74. What is Web Service? How it’s
connected?
75. What it is NSURL?
76. Difference b/w SAX Parsing and DOM
Parsing?
77. How to Implement Check Boxes and
List View and Tree View and Combo box?
78.
What is Notifications? Types of Notifications?
79.
What is Push Notification?
80. How to handle device orientation?
ShouldAutoRotatetointerfaceorientation
– method
81. Deployment steps?
Deplolyment
:
1) Open
applicatons- uitilites-keychain access –certificate assistance – requested a
certificate from a certifate authority
Email :
Savetodisk(radio button)
Ok
Certificate icon Is created in desktop. (developer
certificate is created)
2) Upload
the developer certificate into developer.apple.com
Registed login :
3) Create
the provisioning profile from developer.applie.com and download it to system.
4) Open
the XCode and select the window -> organizer -> select the device and
under provisioning profile tab drag it to device.
82. Steps for App Store
Submission?
83. What is IPA?
84. Adhoc
distributions?
85. what is plist?
86. what is
Multithreading? How it’s supported?
87.what is the
dimensions of IPHone And IPAd?
88.What is the
dismismodal view controller and present modal view controller?
89. Difference b/w Non
Automic and Automic ?
90. Difference b/w Nib
and Xib?
91. Difference b/w Data
Source and Delegate?
92.what is Selector?
93.Difference b/w Array
and NSDictionary?
94.Difference b/w Super
and Base?
95. What are
Application Life Cycle Phases?
96.How to build the Application?
97.How to handle Errors
and Bugs and Exceptions?
98. How to test the
Application?
99. How to create the
Custom controls?
100. How to Change the
Color for title bar of navigation bar?
101. Difference b/w
Navigation And Tab Bar controller?
102. What is JSON?
103. What is Gestures?
104. Difference b/w
#define and #paragama and #import?
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