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. setters
onscreen 'widgets' a user can interact with
Seques .... relationships
mutators
protocols

2. Syntax for declaring a string called 'userName'
:
casting
NSString *userName;
<>

3. Name of the '|' symbol
Application Programming Interface
IBAction
pipe
NSObject

4. Write a line of code creating a pointer to a wall paper image called 'wp1' that refers to a resource in an app with the file name 'wallPaper_01.png'

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

5. Used to define a list of all methods and properties a class uses
png
Commmand-R
inspector and library
interface file

6. The HIG requires some kind of _____ element in a cell if there is more information available
UIWindow
hasShrunk==YES && hasMoved == YES
Model-View-Controller
disclosure

7. If you wish to 'echo print' breadcrumb info as you develop your app - this panel must be visible
bgImages = [[NSArray alloc] initWithObjects: wp1 - wp2 - wp3 - wp4 - wp5 - nil];
The Console area of the Debug area
Program received signal: EXC_BAD_ACCESS
stub

8. The ________ class provided a container for the management and display of views
Determine how controls resize/reposition themselves when a device changes orientation
UIWindow
Command+0
modal views

9. 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.
controller
YES
debugger
Group

10. Recommended image type for button graphics
57 x 57
view
png
Command+S

11. 'plist' stands for...
property list
workspace
!=
image view

12. Used to indicate any type of object
<type> <variableName>;
Snapshot feature
Touch Up Inside
id

13. strong and nonatomic are examples of ...
attributes
Classes
main()
IBAction)moveMe:(id)sender;

14. Something the simulator cannot reliably test
performance
stub
2
double

15. Resembles a slot machine display
nil
UIPicker
int
double

16. IDE
y *= 5;
Command+1
Program received signal: EXC_BAD_ACCESS
Integrated Development Environment

17. What computer language is the storyboard written in?
Treats the field as a password - hiding each character as it is typed
productivity
Objective-C
XML

18. Dimensions of iPad (in points)
Utility apps
Document Outline Area or Outline View
/*blah blah blah */
1024 x 768

19. Class used for creating image views
UIImageView
@
Actions
UIPicker

20. You have created some 'breadcrumbs' using NSLog to trace the path of your code - and the debug area is open - yet you see no information in the panel. What's the problem and what is the solution?

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

21. @synthesize directives should be placed _____ (above or below) the @implementation directive in the implementation file
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.
Option+Command+4
UIPicker
below

22. Syntax to include UIKIT in a class
UIPicker
Object library
%
#import <UIKIT/UIKIT.h>

23. Memory aid for keyboard shortcuts in the Navigator panel

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

24. This file contains the code that makes everything 'work'
alpha
nonatomic
implementation file
utility

25. To use a new class you need to _____ it
instantiate
h
nonatomic
<>

26. File name suffix indicating an image is suitable for retina display
Scheme
@2x
NSDate
!=

27. Connections between Objects in the Interface Builder and the header file are formed by _____-_______ from the object to the proper place in the header file
First Responder
control-dragging
@
NSMutableArray

28. Combining two messages into a single line of code
x--;
nested message send
512MB
UILabel *myLabel = [[UILabel alloc] initWithString:@'GO!'];

29. RAM for iPhone
512MB
@synthesize directive
Object library
eXtensible Markup Language

30. IDE for iPhone Development
NSURLRequest
graduationParty ... addAttendee:withDish
Xcode
NSArray

31. Always used to end the list of objects when initializing an array
h
320 x 480
nil
retain

32. Files used to create a class
interface and implementation files
UILabel *myLabel = [[UILabel alloc] init];
label
nonatomic

33. What do the Autosizing settings of the Size Inspector do?
[[<class name> alloc] init];
YES
Determine how controls resize/reposition themselves when a device changes orientation
Commmand-R

34. Attribute that informs the system that the object referred to needs to be kept around and not discarded from memory
mutators
hash
YES
strong

35. A fully opaque image has an _______ property value of ______
int
Collections
alpha ... 1
CGAffineTransform

36. Class used for image manipulations such as scaling - rotation and translation. Its data structure represents a matrix used for affine transformations.
sending an object a message
CGAffineTransform
#import <UIKIT/UIKIT.h>
switch

37. Modulus (remainder) operator
subclass
@2x
alpha ... 1
%

38. Word used to indicate that a user can't interact with a given element
static
superclass
bool
Model-View-Controller

39. What property needs to be set before a scroll view (UIScrollView) will scroll?
<type> <variableName>;
contentSize
Identity Inspector
%d

40. Key sequence to open the Attributes Inspector
UIViewController
for(<initialization>;<test condition>;<update instruction>){/*do this over and over*/}
Option+Command+4
iOS Simulator

41. Return type indicating a method returns nothing
void
NSString
1024 x 768
view

42. These define to which messages the datasource and delegate respond
protocols
320 x 480
controller
UILabel *myLabel = [[UILabel alloc] initWithString:@'GO!'];

43. Typical header syntax for a button that will be applying the 'moveMe' action in an app
IBAction)moveMe:(id)sender;
UIImageView
!
Cocoa Touch

44. Framework used to write iPhone apps
Cocoa Touch
rand( )%21
for(<initialization>;<test condition>;<update instruction>){/*do this over and over*/}
Utility apps

45. Used to set up an outgoing connection from the implementation code to the view
xcodeproj
User Interface
static
IBOutlet

46. A common button type that indicates additional information is available
detail disclosure
114 x 114
alpha ... 1
&&

47. 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?
512MB
myImage@2x.png
Scheme
for(<initialization>;<test condition>;<update instruction>){/*do this over and over*/}

48. Crash statement likely when an NSString is assigned a value with an incorrect format
label.text=@'Hello World!';
Attributes Inspector
%1.2f
Program received signal: EXC_BAD_ACCESS

49. Size of iPhone 'lo-res' icon image in pixels
mutators
57 x 57
Command+S
count++;

50. The library that contains the objects you can add to a view or XIB file
Object library
Option+Command+4
%1.2f
controller