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. Used to indicate any type of object
id
Determine how controls resize/reposition themselves when a device changes orientation
Double-click
protocols

2. The bar across the top of the Editor area that shows you the item you are editing
Jump Bar
implicitly declare a matching instance variable
UITextField
Cocoa Touch - Media - Core Services - Core OS

3. The files that contain all the scenes you will use in a project.
storyboards
NeXSTEP
Object Library
proxy

4. 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?
protocols
@synthesize
h
myImage@2x.png

5. The HIG requires some kind of _____ element in a cell if there is more information available
disclosure
nonatomic
import
debugger

6. A fully opaque image has an _______ property value of ______
Identity Inspector
Control-click on the View Controller's icon to bring up a Connections dialog
#import 'myFile.h'
alpha ... 1

7. What type of object does a web view expect as a parameter when loading a remote URL?
parameter
Cocoa is the development framework used for most native Mac OS X applications; Cocoa Touch is customized for a touch interface
h
NSURLRequest

8. Closes an interface file
strong
contentSize
class
@end

9. Apps written to assist users with special disabilities
alpha ... 1
performance
accessible apps
Model-View-Controller

10. Class of strings that can be changed
nested message send
NSMutableString
%
YES

11. getters
Touch Up Inside
accessors
Commmand-R
m

12. This keyword in the property directive is related to memory management and refers to the idea that we want to maintain control of memory issues
UITextView
retain
m
utility

13. Key sequence to hide/show the Assistant Editor
@
alpha ... 0
ption+Command+Return
nil

14. Beginning with iOS4 - applications no longer terminate when the user presses the...
Home button
detail disclosure
modal views
[myLabel setText:@'Howdy'];

15. Any 'directive' statement begins with this symbol
@
Cocoa Touch - Media - Core Services - Core OS
bool
Identity Inspector

16. Purpose of the 'Auto-enable Return Key' attribute for text fields
[[<class name> alloc] init];
immersive
Actions
Disables the Return key on the keyboard unless the user has entered at least a single character of input into the field

17. ______ are variables that can store a ____ to an object.
immersive
Classes
png
Outlets ... pointer

18. Syntax for block-comment
/*blah blah blah */
alpha ... 0
conform
IBOutlet

19. If a method name includes a colon (:) this indicates a required _________
NSMutableString
-
parameter
eXtensible Markup Language

20. Calling a method is the same as...
NSLog
sending an object a message
Group
xcodeproj

21. Multiline text entry block
class
UITextView
UITextField
UIViewController

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

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23. What are the guidelines for the class prefix for a project?

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24. This Xcode utility allows you to check CPU usage - memory allocation and network/file access (among other things)
if(<boolean condition>){/* stuff to do*/} else{ /*stuff to do*/}
protocols
model
Instruments

25. Size of iPhone 'lo-res' icon image in pixels
XML
productivity
57 x 57
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.

26. Given: #import <UIKit/UIKit.h> @interface WelcomeViewController : UIViewController @end The superclass for WelcomeViewController
conform
xcodeproj
@synthesize
UIViewController

27. Two-way selection logic block
*
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
Command+1
if(<boolean condition>){/* stuff to do*/} else{ /*stuff to do*/}

28. This type of app is typically one screen - and gives you the basics with minimal interaction
Command+R
sending an object a message
storyboard
utility

29. Syntax for declaring a variable
Gray circle with a white 'X' in it - positioned to the right of the text field box
<type> <variableName>;
strong
[myLabel setText:@'Howdy'];

30. File name suffix indicating an image is suitable for retina display
main()
stub
view controller
@2x

31. Syntax for reserving memory and initializing an object
debugger
implicitly declare a matching instance variable
[[<class name> alloc] init];
Hold down the Option key and point to the other label. The distance will be shown

32. Scaling - rotation - and translation are the most commonly used manipulations supported by _____ transforms - but skewing is also possible.
header
affine
UITextField
[shrinkButton setTitle:@'Grow' forState: UIControlStateNormal];

33. Tests to see whether two values are not equal
Identity Inspector
static
!=
myImage@2x.png

34. Apple's classes often provide a special initialization method called a _____ method
inspector and library
switch
utility
convenience

35. A class that manages the user's interaction with the iDevice
switch
[myLabel setText:@'Howdy'];
@2x
view controller

36. In a stepper control - when this attribute option is checked - the stepper's value is automatically set to the minimum value when the maximum value is exceeded (or vice versa).
image view
Treats the field as a password - hiding each character as it is typed
wrap
57 x 57

37. A view that is displayed on top of an original view when user interactions are required
bgImages = [[NSArray alloc] initWithObjects: wp1 - wp2 - wp3 - wp4 - wp5 - nil];
modal views
h
Hold down the Option key and point to the other label. The distance will be shown

38. SDK

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39. RAM for iPhone
512MB
bgImages = [[NSArray alloc] initWithObjects: wp1 - wp2 - wp3 - wp4 - wp5 - nil];
subclass
Commmand-R

40. What's the difference between Cocoa and Cocoa Touch?
Document Outline Area or Outline View
%@
Cocoa is the development framework used for most native Mac OS X applications; Cocoa Touch is customized for a touch interface
segue

41. NS stands for...
static
NSString *phrase = @'Hello World';
instantiation
NeXSTEP

42. Used to test an app without needing an actual physical device
bool
UIImageView
iOS Simulator
NSMutableArray

43. Recommended image type for button graphics
'Interface Builder'
Model-View-Controller
png
x--;

44. setters
Send the 'resignFirstResponder' message to the object that currently controls the keyboard (such as a text field)
mutators
xcodeproj
instance variable

45. Allows you to easily track multiple versions of your project
import
Snapshot feature
proxy
Nib (but a few call it 'zib' but that's not preferred)

46. Purpose of 'Secure' attribute for text fields
Treats the field as a password - hiding each character as it is typed
instantiation
UIViewController
IBAction)moveMe:(id)sender;

47. To zoom between an overview of the entire storyboard and the actual size view - ______ the storyboard background.
static
Program received signal: EXC_BAD_ACCESS
Disables the Return key on the keyboard unless the user has entered at least a single character of input into the field
Double-click

48. Data type for numbers with 'tame' numbers of decimal points
float
instance variable
retain - release - dealloc - autorelease
com.basicversity

49. Denotes a class method
+
double
!
Attributes Inspector

50. A fully transparent image has an _____ property value of _____
Command+1
Jump Bar
alpha ... 0
import