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iOS 5 App Development Objective C

Instructions:

Answer 50 questions in 15 minutes.
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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. Archiving works by creating an instance of _ - which is essentially just a container for data - and placing objects and their data inside it.
unordered collection of objects - objects must be unique
NSCoder
creating an initializer
in the dealloc - or when a Controller's view is 'unloaded'

2. id is a...
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
pointer to an object
references to objects
CGRect bounds

3. Why properties?
they need to be defined in the implementation file
safety - subclassability and makes code look more consistent with C structs
instance variable of an object is valid
only the innermost loop in which the break is executed is terminated

4. Variable names tend to start with a _ letter; class names tend to start with an _ letter.
initializers
you must import the header file of that class
lowercase - uppercase
group of global functions already assigned to this class

5. When an NSMutableArray is deallocated - it sends...
new instances of the class or retrieve some global property of the class.
Hash table - Look up objects using a key to get a value.
the message release to all its entries
retain

6. Execution of the break statement...
setPossessionName
Hash table - Look up objects using a key to get a value.
causes the program to immediately exit from the loop it is executing - whether its for - while or do
class methods - initializers

7. Any other initializer a class has calls the _ designated initializer....
Data Encapsulation
class's
rectangular
instance

8. In general - in Objective-C - a reference to an instance is a _ - and the name of the data type of what's at the far end of that pointer is the name of the instances's _.
first responder
will be ignored
pointer - class
pointer to an object

9. SomeClass* aVariable = [[SomeClass alloc] init]; is an example of what kind of instance?
Instantiation from scratch
callbacks
calling code that does the instantiation for you
alloc - singleton - informational utility method?

10. Designated initializer makes sure that every...
view controller's initialization method
instance variable of an object is valid
to get and set variables
Data Encapsulation

11. In any application with UINavigationController - the navigation controller...
dealloc - is called on the object & the object's memory is returned to the heap
has one root view controller
Controller Objects[Managers]
ready-made instances - instantiation from scratch - and nib based instantiation

12. Number one use of protocols in iOS...
delegates and dataSources
lowercase - uppercase
Ready-Made Instance
group of global functions already assigned to this class

13. Just a floating point number - but we always use it for graphics.
alloc - singleton - informational utility method?
CGFloat
safety - subclassability and makes code look more consistent with C structs
parentViewController

14. In object oriented languages - we call methods that get and set instance variables
accessors - individually we call them 'getters' and 'setters'
CGRect
variable scope - if defined within a block
the instance variables

15. UIViewController has several methods that get called at certain times...
UIViewController
attributes - behavior
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
NSBundle

16. In object oriented languages - we call methods that get and set instance variables accessors - individually we call them...
message
collection of collections - NSArray of an NSArray
setPossessionName
'getters' and 'setters'

17. To get the full path for a directory in the sandbox - you use the _ NSSearchPathForDirectoriesInDomains.
the instance variables
copy - retain
C Functionn
initializers

18. Classes describe two things...
attributes - behavior
has one root view controller
(id)initWithFrame:(CGRect)aRect;
Used to find the time right now or to store past or future time/dates

19. At the top of any implementation file...
designated initializer
the array relinquishes ownership of that object and no longer has a pointer to it
class
you must import the header file of that class

20. A message is always contained in square brackets - and has three parts
you must import the header file of that class
type - name and value
receiver - selector - arguments
UIViewController

21. A set of variables and associated methods. An object can be sent messages to cause one of its methods to be executed.
create a XIB file
viewWillDissapear: and viewWillAppear:
object
new instances of the class or retrieve some global property of the class.

22. How do I implement my drawRect?
NSLog routine
accessors - individually we call them 'getters' and 'setters'
Core Graphics Framework
receiver

23. You use _ to implement the view
designated initializer
safety - subclassability and makes code look more consistent with C structs
CGRect
CGRect bounds

24. In general - class methods tend to be factory methods - that is...
array[class - NSMutableArray]
C Functionn
values
methods for generating an instance

25. The only reason to temporarily own an object - is...
to give it someone else - or another object
UIViewController
pointer - class
size and position

26. Views have three properties related to their location and size: @property _ _;
alloc - singleton - informational utility method?
CGRect bounds - GCPoint center - CGRect frame
pointers
CGRect bounds

27. When a view controller presents a modal view controller - the _ of the modal view controller is set to be the parent of the presenting controller
UIView
array[class - NSMutableArray]
pointer - class
parentViewController

28. Name of the new class - it's superclass - the instance variables that each instance of this class has - and any methods this class implements
@synthesize
CGFloat
protocol
header files declare

29. We can use dot notation to reference...
in the dealloc - or when a Controller's view is 'unloaded'
implementation
an object's property
data source - delegate and view controller

30. Files Owner...
retain
%d
CGRect bounds - GCPoint center - CGRect frame
Is a placeholder object

31. Each class picks one _ as it's designated initializer....
dealloc - is called on the object & the object's memory is returned to the heap
causes the program to immediately exit from the loop it is executing - whether its for - while or do
initializer
the array becomes an owner of that object and has a pointer to it.

32. NSArray - class...
alloc - singleton - informational utility method?
UIViewController
ordered collection of objects - immutable
draw images

33. If a class declares a _ that is different from its superclass - you must override the superclass' _ to call the new _...
define it in the implemenation file
designated initializer
Core Graphics Framework
data source - delegate and view controller

34. A command directed to an object is called an...
Encapsulation of functionality
message
Used to find the time right now or to store past or future time/dates
class methods - initializers

35. Hold data and know nothing about the user interface
only the innermost loop in which the break is executed is terminated
Model Objects[Factory Worker]
the message release to all its entries
calling code that does the instantiation for you

36. NSDate - class...
instance variable of an object is valid
Encapsulation of functionality
Used to find the time right now or to store past or future time/dates
to give it someone else - or another object

37. Reducing details to focus on the core concepts
data
in the dealloc - or when a Controller's view is 'unloaded'
only the class and subclasses can access
Abstraction

38. A view is a subclass of _
instance variable of an object is valid
rectangular
Is a placeholder object
UIView

39. Primitives and C Structures...
NSBundle
pointer to an object
parentViewController
cannot be added to an array

40. When overriding a method - all you need to is _ - you do not need to declare it in the header file because it has already been declared by the superclass....
define it in the implemenation file
Object wrapper around primitive types like int - float - double - BOOl
CGRect bounds - GCPoint center - CGRect frame
view controller's initialization method

41. Categories are an Objective C way to add _ to an existing class without subclassing
pointers
methods
instance variables
is called every time the event occurs

42. A view represents a _ area
delegates and dataSources
will be ignored
cannot be added to an array
rectangular

43. A callback is a function that is supplied in advance of an event - and...
NSBundle
new instances of the class or retrieve some global property of the class.
pointer - class
is called every time the event occurs

44. If you have extra work you want to do on the view...
Data Encapsulation
UIViewController
do so in viewDidLoad
class

45. Each _ has a 'designated' initializer method....
class
data source - view controller and delegate
new instances of the class or retrieve some global property of the class.
size and position

46. NSArray - important methods...
to give it someone else - or another object
subview(s)
@synthesize
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject

47. NSValue - class...
Is a placeholder object
size and position
Generic object wrapper for other non-object data types
Object wrapper around primitive types like int - float - double - BOOl

48. A view is an...
methods
declaration and initialization of a variable
instance of UIView or one of its subclasses
Anytime you call a method with new - alloc or copy. You own and must release that object.

49. The designated initializer calls the _ designated initializer....
its dataSource
instance variables
superclass's
in the dealloc - or when a Controller's view is 'unloaded'

50. C struct with a CGPoint origin and a CGSize size - in other words two c structs.
they need to be defined in the implementation file
CGRect
receiver
draw images

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iOS 5 App Development Objective C

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