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iOS 5 App Development Objective C

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Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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1. NSDate - class...
data source - view controller and delegate
self
C Functionn
Used to find the time right now or to store past or future time/dates

2. Each class picks one _ as it's designated initializer....
initializer
view
the array relinquishes ownership of that object and no longer has a pointer to it
only the class and subclasses can access

3. Each _ has a 'designated' initializer method....
viewWillDissapear: and viewWillAppear:
class
methods
Controller Objects[Managers]

4. The only reason to temporarily own an object - is...
message
Encapsulation of functionality
Anytime you call a method with new - alloc or copy. You own and must release that object.
to give it someone else - or another object

5. The class is responsible for what instance variables the instance has - but not the _ of those variables.
data source - view controller and delegate
protocol
values
lowercase - uppercase

6. Each object does its own job - and presents to the rest of the world - to other objects - and indeed in a sense to the programmer - an opaque wall whose only entrances are the methods to which it promises to respond and the actions it promises to per
variable scope - if defined within a block
instance variables
Encapsulation of functionality
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear

7. A method in a _ is required unless its preceded by an @optional.
protocol
methods for generating an instance
initializer
variable scope - if defined within a block

8. In the last line of an init method...
is an instance of that class
you always return the newly initialized object(return self)
methods
object

9. When an object is removed from an NSMutableArray - that object is sent the message release;...
for inheritance - adopting the superclasses implementation
the array relinquishes ownership of that object and no longer has a pointer to it
selector[message]
instance variables

10. id is a...
pointer to an object
message
draw images
alloc - singleton - informational utility method?

11. Any other initializer a class has calls the _ designated initializer....

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12. Execution of the break statement...
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
Ready-Made Instance
accessors - individually we call them 'getters' and 'setters'
causes the program to immediately exit from the loop it is executing - whether its for - while or do

13. Also - because arrays only hold a pointer to an object...
a single-array can contain objects of different types
view controller
header files declare
the message release to all its entries

14. Files Owner...
superclass's
Is a placeholder object
class
type - name and value

15. Use of class methods - there are three...
'getters' and 'setters'
data
alloc - singleton - informational utility method?
CF - Ref

16. The designated initializer calls the _ designated initializer....

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17. Never access a view controller's view in that...

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18. Only exists within the statement block there defined - outside of the block is fine
do so in viewDidLoad
receiver
variable scope - if defined within a block
Object wrapper around primitive types like int - float - double - BOOl

19. A set of variables and associated methods. An object can be sent messages to cause one of its methods to be executed.
object
self
in the dealloc - or when a Controller's view is 'unloaded'
is called every time the event occurs

20. Core foundation classes are prefixed with _ and suffixed with _
instance variables
CF - Ref
NSCoder
message

21. A UITableView usually needs three different pieces...
C Functionn
alloc - singleton - informational utility method?
a single-array can contain objects of different types
data source - delegate and view controller

22. A view is a subclass of _
data source - view controller and delegate
UIView
subview(s)
rectangular

23. A message is always contained in square brackets - and has three parts
pointer - class
superclass's
receiver - selector - arguments
arguments[message]

24. When making a tableView always...
arguments[message]
lowercase - uppercase
reuse your cells
only the innermost loop in which the break is executed is terminated

25. NSValue - class...
alloc - singleton - informational utility method?
CF - Ref
the instance variables
Generic object wrapper for other non-object data types

26. SomeClass* aVariable = [[SomeClass alloc] init]; is an example of what kind of instance?
upper
Encapsulation of functionality
Instantiation from scratch
declaration and initialization of a variable

27. Delegation is an object oriented approach to
callbacks
class's
instance variable of an object is valid
method

28. In a class method you cannot access...
ordered collection of objects - immutable
C Functionn
data
the instance variables

29. To get the full path for a directory in the sandbox - you use the _ NSSearchPathForDirectoriesInDomains.
callbacks
in the dealloc - or when a Controller's view is 'unloaded'
self
C Functionn

30. Origin of a view's coordinate system is _ left
attributes - behavior
creates an instance of NSString that holds the character string
Abstraction
upper

31. What does autorelease mean?
@synthesize
wait until the loop finishes processing the event - at the end release it
methods for generating an instance
%d

32. Asking a class or object to execute a method
message
alloc - singleton - informational utility method?
object
you always return the newly initialized object(return self)

33. When do you take ownership?...
'getters' and 'setters'
C Functionn
first responder
Anytime you call a method with new - alloc or copy. You own and must release that object.

34. Each individual instance is a bundle of data that it maintains. Typically that data is private - which means that it's encapsulated as well; no other object knows what that data is or in what form it is kept. The only way to discover from outside wha
the array becomes an owner of that object and has a pointer to it.
methods for generating an instance
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
Maintenance of state

35. Object Oriented based analogue to a function is called a...
method
nil
Instantiation from scratch
view controller's initialization method

36. The root view controller typically creates the next view controller - and the next _ creates the one after that
methods
view controller
instance variables
copy - retain

37. A pointer to the object being asked to execute a method
you always return the newly initialized object(return self)
receiver[message]
object
selector[message]

38. @property - is using methods...
define it in the implemenation file
to get and set variables
nil
instance variables

39. super - is used...
you must import the header file of that class
ready-made instances - instantiation from scratch - and nib based instantiation
(id)initWithFrame:(CGRect)aRect;
for inheritance - adopting the superclasses implementation

40. A _ handles touch events.
Encapsulation of functionality
new instances of the class or retrieve some global property of the class.
alloc - singleton - informational utility method?
view

41. NSNumber - class...
Object wrapper around primitive types like int - float - double - BOOl
its dataSource
receiver
array[class - NSMutableArray]

42. UIViewController has several methods that get called at certain times...
group of global functions already assigned to this class
message
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
do so in viewDidLoad

43. A view exists within a hierarchy. The window (an instance of UIWindow) is a view and the root of the hierarchy. It has _ (that appear on the window). Those views can also have _.
subview(s)
Model Objects[Factory Worker]
Instantiation from scratch
Continue

44. In Objective C - the name of a setter method is set plus the name of the instance variable it is changing - for example PossessionName would be...
dealloc - is called on the object & the object's memory is returned to the heap
instance
setPossessionName
viewWillDissapear: and viewWillAppear:

45. Just a floating point number - but we always use it for graphics.
first responder
CGFloat
methods for generating an instance
the instance variables

46. Class methods do not operate on an _ or have any access to _ variables....
instance
for inheritance - adopting the superclasses implementation
reuse your cells
its dataSource

47. Also if you send the NSObject the _ message - you own that object.
the array relinquishes ownership of that object and no longer has a pointer to it
collection of collections - NSArray of an NSArray
initializers
retain

48. Whenever a UINavigationController is about to swap views - it sends out two messages
references to objects
reuse your cells
selector[message]
viewWillDissapear: and viewWillAppear:

49. If you aren't going to initialize an instance reference pointer at the moment you declare it by assigning a real value - it's a good idea to assign it _.
nil
ordered collection of objects - immutable
upper
designated initializer

50. Reducing details to focus on the core concepts
Abstraction
an object's property
receiver[message]
do so in viewDidLoad

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iOS 5 App Development Objective C

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