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. 'Build and run' keyboard shortcut
ommand+Return
Commmand-R
==
web view

2. @synthesize directives should be placed _____ (above or below) the @implementation directive in the implementation file
'Software Development Kit'
while(<boolean expression>){/*stuff to do here*/}
Seques .... relationships
below

3. Key sequence to hide/show Navigator View
Command+0
token
performance
Option-click a symbol

4. To use a new class you need to _____ it
instantiation
scene
instantiate
UITextView

5. If you have an image file called 'myImage.png' and you make a hi-res version for the retina display - what should be the name of the new file?
Right-click on it in the Navigator panel and choose 'Open as...' and select 'Source Code'
Xcode
+
myImage@2x.png

6. Syntax to include UIKIT in a class
UILabel *myLabel = [[UILabel alloc] initWithString:@'GO!'];
modal views
inspector and library
#import <UIKIT/UIKIT.h>

7. Formatting placeholder for strings
Attributes Inspector
instantiation
strong
%@

8. Consider: int x = 6;int y = 7;float quotient = (float) x/y;The statement that creates the variable 'quotient' is an example of ...
casting
First Responder
detail disclosure
<>

9. Property affecting an element's transparency
alpha
NSMutableString
57 x 57
<>

10. Multiline text entry block
parameter
Control-click on the View Controller's icon to bring up a Connections dialog
pound
UITextView

11. Single line text field
UITextField
float
alpha
#import 'myFile.h'

12. ______ enable applications to store multiple pieces of information in a single object
UIImage *wp1 = [UIImage imageNamed:@'wallPaper_01.png'];
scene
Collections
User Interface

13. Extension for an iPhone/iPad app
hash
bool
storyboard
xcodeproj

14. The Utilities area has two sections: ______ and ______
[<object variable> <method name>: p1];
NSString *userName;
inspector and library
web view

15. Key sequence to open the Project Navigator (left panel)
Command+1
productivity
Size Inspector
switch

16. Tests to see whether two values are equal
==
@synthesize
property list
NSMutableString

17. You are creating an app for a company whose URL is http://www.basicversity.com . What should be the company identifier for the app when you begin the project?
@
Double-click
UIViewController
com.basicversity

18. Precondition repetition structure syntax
disclosure triangle
pipe
Cocoa is the development framework used for most native Mac OS X applications; Cocoa Touch is customized for a touch interface
while(<boolean expression>){/*stuff to do here*/}

19. Return type indicating a method returns nothing
storyboard
bgImages = [[NSArray alloc] initWithObjects: wp1 - wp2 - wp3 - wp4 - wp5 - nil];
void
IBAction

20. Scaling factor to make an image suitable for retina display
Jump Bar
2
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
%

21. Resembles a slot machine display
NSMutableArray
UIPicker
@
nil

22. Crash statement likely when an NSString is assigned a value with an incorrect format
affine
Something unique - based on the app's name (perhaps abbreviated). Avoid 'NS' or 'UI' since they are used in Apple's frameworks. A framework or library should always be prefixed. For a simple app - they are not necessary.
Program received signal: EXC_BAD_ACCESS
m

23. A transition between scenes - frequently with a visual transition effect applied
modal views
Objective-C
Double-click
segue

24. Objective-C is an extension (super set) of...
Hold down the Option key and point to the other label. The distance will be shown
/*blah blah blah */
C
Treats the field as a password - hiding each character as it is typed

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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

26. Key sequence to open the Attributes Inspector
interface file
Option+Command+4
workspace
Touch Up Inside

27. Templates fill in a bunch of ______-_______ code that serves as a framework in which to write future implementations
Cocoa Touch - Media - Core Services - Core OS
boiler-plate
Instruments
convenience

28. Character used to show an element as a literal string
wrap
modal
Command+S
@

29. A class that manages the user's interaction with the iDevice
view controller
ommand+Return
512MB
Collections

30. Storage location for a piece of information
variable
Jump Bar
IBAction
casting

31. Symbol often denoting a 'pointer'
UIPicker
*
label
@synthesize

32. In your implementation file - the _____ method (provided in stub form by Apple) runs after machine language code reserves some space in memory for your View. This method is often used to create a 'clean slate' as an app opens.
Outlets ... pointer
Snapshot feature
NSLog
viewDidLoad

33. A virtual 'box' for organizing related projects
NSURL
myImage@2x.png
[[<class name> alloc] init];
workspace

34. Method used to print information in an output panel
graduationParty ... addAttendee:withDish
NSDictionary
UITextField
NSLog

35. Data type for whole numbers
float
int
Cocoa Touch
<>

36. This keyword in the property directive is related to the concept of mutability and basically asks Apple to handle the details. This is the more 'relaxed' - less 'powerful' setting of two possibilities
nonatomic
attributes
casting
%1.2f

37. Key sequence to save an Xcode file
nonatomic
segue
Command+S
Object-oriented programming

38. Correct the error: label.text = 'Hello World !';

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

39. Postcondition repetition structure syntax
static
utility
Object Library
do{/*stuff to do here*/}while(<boolean expression>);

40. Piece of information provided to a method when it is messaged
Cocoa is the development framework used for most native Mac OS X applications; Cocoa Touch is customized for a touch interface
parameter
sending an object a message
Treats the field as a password - hiding each character as it is typed

41. In the MVC design pattern for iOS apps - view consists of the various...

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

42. Attribute that informs the system that the object referred to needs to be kept around and not discarded from memory
strong
@synthesize directive
bool
casting

43. Class of collection data type which stores information as object/key pairs
NSDictionary
Isolate the functional components of an app
!=
storyboards

44. Purpose of 'Secure' attribute for text fields
Treats the field as a password - hiding each character as it is typed
scene
bgImages = [[NSArray alloc] initWithObjects: wp1 - wp2 - wp3 - wp4 - wp5 - nil];
header

45. Size of iPhone retina icon image in pixels
*
114 x 114
superclass
main()

46. A ______ is where you edit a view and assign a controller to it.
NSLog
NSArray
scene
Model-View-Controller

47. In the MVC design pattern for iOS apps - this aspect is responsible for receiving user input and acting accordingly - and serves as a 'bridge' between the other two components. It is the backbone of the app.
%1.2f
512MB
controller
Seques .... relationships

48. Companion to the @property directive
Gray circle with a white 'X' in it - positioned to the right of the text field box
@end
@synthesize
utility

49. Used to test an app without needing an actual physical device
x--;
114 x 114
affine
iOS Simulator

50. Dimensions of iPhone (in points)
UIImage *wp1 = [UIImage imageNamed:@'wallPaper_01.png'];
57 x 57
320 x 480
-