Test your basic knowledge |

iOS 5 App Development Basics

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Name of the drop-down menu in Xcode that lets you select the device used with the iOS Simulator
Scheme
Actions
Classes
bool

2. RAM for iPhone
512MB
[[<class name> alloc] init];
Collections
viewDidLoad

3. Other name for an *.xib file
nibfile
property list
implementation file
token

4. What event do you use to detect a button tap?
NSDate
Group
Touch Up Inside
Option+Command+4

5. 4 Top down technology layers making up iOS
Cocoa Touch - Media - Core Services - Core OS
#import 'myFile.h'
instantiate
@

6. The Inspector you will need if you want to connect a custom class to an object in Interface Builder
workspace
512MB
main()
Identity Inspector

7. Extension for interface file
2
h
@
NSString

8. iPhone and iPad ____ support .png transparency
iOS Simulator
do not
void
Double-click

9. @property directives should be placed ____ (above or below) any IBActions in the header file
above
Disables the Return key on the keyboard unless the user has entered at least a single character of input into the field
Application Programming Interface
'Interface Builder'

10. A class that implements a protocol is said to ____ to that protocol
conform
IBAction)moveMe:(id)sender;
@end
performance

11. What do the Autosizing settings of the Size Inspector do?
Determine how controls resize/reposition themselves when a device changes orientation
@
modal views
nibfile

12. How do you show a storyboard file as source code?

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13. Allows you to easily track multiple versions of your project
view
Option-click a symbol
do{/*stuff to do here*/}while(<boolean expression>);
Snapshot feature

14. In the MVC design pattern for iOS apps - this aspect provides the underlying data and methods that offer information to the rest of the application
<>
model
||
%@

15. A virtual 'box' for organizing related projects
Outlets ... pointer
Model-View-Controller
%@
workspace

16. Under what circumstances would you need an outlet for a button if it's just needed to trigger an action?

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17. Apps that provide easy access to a single screen of information with a backside view for modifying preferences
void
Utility apps
Cocoa Touch
header

18. Expression to create a random number in [0 -20];
rand( )%21
alpha ... 1
immersive
@

19. What's the difference between Cocoa and Cocoa Touch?
Option-click a symbol
implementation file
wrap
Cocoa is the development framework used for most native Mac OS X applications; Cocoa Touch is customized for a touch interface

20. Syntax for declaring a string called 'userName'
interface file
UIImageView
NSString *userName;
<>

21. Purpose of 'Secure' attribute for text fields
&&
do{/*stuff to do here*/}while(<boolean expression>);
Option+Command+4
Treats the field as a password - hiding each character as it is typed

22. Negation symbol
Command+1
Look at the three icons at the upper left portion of the Debug console. The far left one - 'Show only the Variables View' will not show the NSLog-ed information. Click the center icon ('Show the Variables View and the Console') or the right icon ('Sh
!
Disables the Return key on the keyboard unless the user has entered at least a single character of input into the field

23. Denotes a class method
convenience
nil
+
Cocoa is the development framework used for most native Mac OS X applications; Cocoa Touch is customized for a touch interface

24. Master class in iOS
NSLog
header
interface and implementation files
NSObject

25. Implements a logical AND condition
ption+Command+Return
UIImage *wp1 = [UIImage imageNamed:@'wallPaper_01.png'];
&&
nil

26. Objective-C is an extension (super set) of...
NSMutableString
myImage@2x.png
C
Option-click a symbol

27. A tool in Xcode to help fix broken code
Commmand-R
NSMutableString
debugger
NSLog(@'%s' - __FUNCTION__);

28. Code fragment for echo printing the name of a function as it loads (for tracing the sequence of code in a project...leaving breadcrumbs)

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29. @synthesize directives should be placed _____ (above or below) the @implementation directive in the implementation file
void
Cocoa Touch - Media - Core Services - Core OS
Document Outline Area or Outline View
below

30. Way to refer to an object within its own methods
IBAction)moveMe:(id)sender;
self
casting
x--;

31. Collection of interface elements and data storage elements etc you can access from your applications
Gray circle with a white 'X' in it - positioned to the right of the text field box
Cocoa Touch
alpha ... 1
interface file

32. Resembles a slot machine display
interface and implementation files
pound
UIPicker
Attributes Inspector

33. An _______ is used to enable your code to talk to objects within views
/*blah blah blah */
IBOutlet
id
attributes

34. Used to display image file resources and show simple animations
image view
//blah blah blah
Look at the three icons at the upper left portion of the Debug console. The far left one - 'Show only the Variables View' will not show the NSLog-ed information. Click the center icon ('Show the Variables View and the Console') or the right icon ('Sh
convenience

35. Key sequence to save an Xcode file
Integrated Development Environment
Command+S
CGAffineTransform
sending an object a message

36. Syntax to include the fictitious user-created file 'myFile.h'

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37. A skeleton (holding place) or framework of code that will be completed in the future; provided initially so code will compile (but it may not function)
NSMutableArray
stub
eXtensible Markup Language
NSMutableString

38. Implements a logical OR condition
header
||
NSLog
do{/*stuff to do here*/}while(<boolean expression>);

39. Storage place for a piece of information specific to a class
instance variable
Cocoa Touch - Media - Core Services - Core OS
Double-click
control-dragging

40. API
accessors
Attributes Inspector
Application Programming Interface
alpha ... 0

41. Key sequence to open the Standard Editor
ommand+Return
IBAction
xcodeproj
Command + Tab

42. A ______ is where you edit a view and assign a controller to it.
hasShrunk==YES && hasMoved == YES
!=
[<object variable> <method name>];
scene

43. What are data detectors?
do{/*stuff to do here*/}while(<boolean expression>);
h
void
Attribute settings for some onscreen controls (like text areas) that analyze content and provide helpful links based on what they find. For example - phone numbers can be touched to dial the phone; web addresses can launch Safari if tapped - etc

44. This type of app is typically one screen - and gives you the basics with minimal interaction
Cocoa is the development framework used for most native Mac OS X applications; Cocoa Touch is customized for a touch interface
Program received signal: EXC_BAD_ACCESS
utility
NSArray

45. This file contains the code that makes everything 'work'
double
controller
implementation file
protocols

46. Formatting placeholder for a floating point value with one digit on the left of the decimal and two digits on the right
hash
strong
%1.2f
nonatomic

47. An array of background images called 'bgImages' has been declared as an instance variable in your header file. You have created a set of 5 background images stored in UIImage variables wp1 through wp5. Write a line of code that initializes the array.
bgImages = [[NSArray alloc] initWithObjects: wp1 - wp2 - wp3 - wp4 - wp5 - nil];
nil
modal views
label

48. Language used to write iOS apps
Command+0
*
interface and implementation files
Objective-C

49. getters
switch
accessors
sending an object a message
!

50. A transition between scenes - frequently with a visual transition effect applied
variable
web view
segue
Look at the three icons at the upper left portion of the Debug console. The far left one - 'Show only the Variables View' will not show the NSLog-ed information. Click the center icon ('Show the Variables View and the Console') or the right icon ('Sh