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. Shortcut for writing: count = count + 1;
Cocoa is the development framework used for most native Mac OS X applications; Cocoa Touch is customized for a touch interface
NSString *phrase = @'Hello World';
performance
count++;

2. An alternative way to see the connections between an object in the Interface Builder and it's code in Xcode without using the Connections inspector

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

3. Boolean for 'true' in Objective-C
header
stub
Snapshot feature
YES

4. Scaling - rotation - and translation are the most commonly used manipulations supported by _____ transforms - but skewing is also possible.
Option-click a symbol
hash
affine
Program received signal: EXC_BAD_ACCESS

5. Collection of interface elements and data storage elements etc you can access from your applications
Scheme
Cocoa Touch
interface file
y *= 5;

6. You have an instance variable called 'myLabel' that is a member of UILabel. In an app - you set it's text property to 'Howdy' with the correctly-written command: myLabel.text = @'Howdy'; Re-write this command using [ ] message-sending syntax

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

7. Word used to indicate that a user can't interact with a given element
UITextField
static
com.basicversity
<>

8. Attribute that informs the system that the object referred to needs to be kept around and not discarded from memory
strong
x--;
id
attributes

9. Extension for interface file
C
nil
UITextView
h

10. What event do you use to detect a button tap?
Touch Up Inside
Command+0
Utility apps
casting

11. This Xcode utility allows you to check CPU usage - memory allocation and network/file access (among other things)
Single View Application
Instruments
Group
[<object variable> <method name>];

12. setters
proxy
mutators
Model-View-Controller
Size Inspector

13. Something the simulator cannot reliably test
NSObject
token
performance
interface file

14. If you wish to 'echo print' breadcrumb info as you develop your app - this panel must be visible
The Console area of the Debug area
storyboards
implementation file
double

15. Declare and initialize a string that says: 'Hello World' whose identifier if 'phrase' . Use the shortest command possible.

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

16. Apple's classes often provide a special initialization method called a _____ method
myImage@2x.png
convenience
hasShrunk==YES && hasMoved == YES
parameter

17. A fully transparent image has an _____ property value of _____
UIApplication
alpha ... 0
%@
storyboards

18. Directive to include other interface files that an application might need to access
conform
Classes
import
XML

19. A common button type that indicates additional information is available
detail disclosure
UIPicker
prototyping
png

20. Key sequence to open the Attributes Inspector
property list
Option+Command+4
view controller
Document Outline Area or Outline View

21. Size of iPhone retina icon image in pixels
114 x 114
Cocoa Touch
Cocoa is the development framework used for most native Mac OS X applications; Cocoa Touch is customized for a touch interface
mutators

22. These define to which messages the datasource and delegate respond
Determine how controls resize/reposition themselves when a device changes orientation
double
protocols
First Responder

23. Syntax for block-comment
Size Inspector
UITextView
/*blah blah blah */
mutators

24. Way to refer to an object within its own methods
self
inspector and library
eXtensible Markup Language
Command plus the navigator's position in the selector. For example - the project navigator shortcut is Command-1

25. A view that is displayed on top of an original view when user interactions are required
label
UIPicker
below
modal views

26. Extension for implementation file
modal
UIImageView
XML
m

27. Syntax for declaring a variable
proxy
<type> <variableName>;
Home button
320 x 480

28. This type of app is mostly custom controllers and graphics
%1.2f
immersive
Determine how controls resize/reposition themselves when a device changes orientation
bgImages = [[NSArray alloc] initWithObjects: wp1 - wp2 - wp3 - wp4 - wp5 - nil];

29. NS stands for...
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.
image view
NeXSTEP
m

30. Although it is possible to declare an instance variable and then define a corresponding property - you may also use @property alone to...
First Responder
instance variable
token
implicitly declare a matching instance variable

31. Opens the Xcode Quick Help Assistant
xcodeproj
segmented control
Option-click a symbol
Cocoa is the development framework used for most native Mac OS X applications; Cocoa Touch is customized for a touch interface

32. Shortcut for writing: x = x - 1;
int
UILabel *myLabel = [[UILabel alloc] initWithString:@'GO!'];
h
x--;

33. The '@' symbol is shorthand for creating one of these
immersive
!=
Integrated Development Environment
NSString

34. Used to set up an outgoing connection from the implementation code to the view
IBOutlet
UIImage *wp1 = [UIImage imageNamed:@'wallPaper_01.png'];
NSString
property list

35. Another name for format specification
Command plus the navigator's position in the selector. For example - the project navigator shortcut is Command-1
token
YES
view

36. Key sequence to hide/show the Assistant Editor
ption+Command+Return
IBAction)moveMe:(id)sender;
while(<boolean expression>){/*stuff to do here*/}
implementation file

37. Dimensions of iPhone (in points)
Command+1
NSString *userName;
subclass
320 x 480

38. Combining two messages into a single line of code
segue
token
nested message send
wrap

39. Key sequence to hide/show Utilities View
view
debugger
rand( )%21
Option+Command+ 0

40. Given: [graduationParty addAttendee: @'Aunt Jane' withDish: @'deviled eggs']; The 'receiver' is _______; the 'selector' is _________
UIViewController
Collections
performance
graduationParty ... addAttendee:withDish

41. A view has a 'Shrink' button whose label needs to change once it is clicked to 'Grow'. Write a 'message' type command to change it's label to 'Grow'

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

42. Return type indicating a method returns nothing
instance variable
NSDate
void
UILabel *myLabel = [[UILabel alloc] init];

43. Syntax for single-line comment
Cocoa Touch
//blah blah blah
retain
rand( )%21

44. Boolean for 'false' in Objective-C
NO
NSURLRequest
Commmand-R
!

45. Class of collection data type which stores information as object/key pairs
!
interface file
NSDictionary
immersive

46. The Utilities area has two sections: ______ and ______
Integrated Development Environment
inspector and library
y *= 5;
Option+Command+ 0

47. 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.
NSArray
viewDidLoad
Scheme
Document Outline Area or Outline View

48. Which Apple project template creates a simple view/view controller application
#import 'myFile.h'
Single View Application
segmented control
bgImages = [[NSArray alloc] initWithObjects: wp1 - wp2 - wp3 - wp4 - wp5 - nil];

49. Key sequence on a Mac to select between open application
property list
Command + Tab
[myLabel setText:@'Howdy'];
viewDidLoad

50. Used to test an app without needing an actual physical device
iOS Simulator
implementation file
myImage@2x.png
@synthesize directive