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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. Name of the method to be executed
its dataSource
NSCoder
Maintenance of state
selector[message]

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

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3. 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 _.
protocol
pointer - class
header files declare
for inheritance - adopting the superclasses implementation

4. The root view controller typically creates the next view controller - and the next _ creates the one after that
header files declare
@interface ClassName:SuperClassName
view controller
you must import the header file of that class

5. Keep view and model objects in sync - control the 'flow' of the application - and save the model objects out to the filesystem
Controller Objects[Managers]
CGFloat
CGRect bounds
Encapsulation of functionality

6. Core foundation classes are prefixed with _ and suffixed with _
subview(s)
Functions
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
CF - Ref

7. A view is an...
pointers
message
methods
instance of UIView or one of its subclasses

8. 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 _.
an object's property
superclass's
nil
(id)initWithFrame:(CGRect)aRect;

9. NSDate - class...
Used to find the time right now or to store past or future time/dates
the message release to all its entries
safety - subclassability and makes code look more consistent with C structs
Core Graphics Framework

10. Only exists within the statement block there defined - outside of the block is fine
variable scope - if defined within a block
creates an instance of NSString that holds the character string
superclass's
its dataSource

11. NSValue - class...
an object's property
Generic object wrapper for other non-object data types
size and position
CGRect bounds

12. 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...
values
array[class - NSMutableArray]
setPossessionName
size and position

13. For view controllers that are closely related - like a table view controller and its detail view controller - you can simply give them _ that point to each other.
lowercase - uppercase
method
instance variables
Functions

14. If a break statement is executed from within a set of nested loops...
NSBundle
the message release to all its entries
only the innermost loop in which the break is executed is terminated
method

15. Views have three properties related to their location and size: @property _ _;
CGRect bounds - GCPoint center - CGRect frame
Maintenance of state
view controller
receiver - selector - arguments

16. In a class method you cannot access...
will be ignored
the instance variables
only the innermost loop in which the break is executed is terminated
you always return the newly initialized object(return self)

17. Dynamic binding means that when we call a certain object's method - and there are several _ of that method - the right one is figured out at runtime.
Object wrapper around primitive types like int - float - double - BOOl
implementation
view controller
safety - subclassability and makes code look more consistent with C structs

18. NSArray - class...
class's
ordered collection of objects - immutable
Is a placeholder object
designated initializer

19. A method in a _ is required unless its preceded by an @optional.
instance variables
do so in viewDidLoad
protocol
'getters' and 'setters'

20. super - is used...
dealloc - is called on the object & the object's memory is returned to the heap
attributes - behavior
Controller Objects[Managers]
for inheritance - adopting the superclasses implementation

21. In the last line of an init method...
accessors - individually we call them 'getters' and 'setters'
you always return the newly initialized object(return self)
Abstraction
Core Graphics Framework

22. Order of the declarations for methods. _ come first - followed by _ - followed by any other methods...
class methods - initializers
wait until the loop finishes processing the event - at the end release it
array[class - NSMutableArray]
cannot be added to an array

23. A delegate is a pointer to an object with a set of methods the delegate-holder knows how to call. In other words - it's _ from a later created object
safety - subclassability and makes code look more consistent with C structs
a mechanism to enable specific callbacks
Used to find the time right now or to store past or future time/dates
instance variables

24. Values to be supplied as the parameters to the method
nil
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
do so in viewDidLoad
arguments[message]

25. Proceed through the loop - jump back to the top and check again
Continue
NSCoder
Controller Objects[Managers]
selector[message]

26. Prefixing a character string with an @ symbol [specific - NSString class]...
object
message
retain
creates an instance of NSString that holds the character string

27. It's class is sent the message alloc - which creates an instance of that class and returns a pointer to it - and then that instance is sent the message init - which gives its instance variables initial values.
@interface ClassName:SuperClassName
rectangular
new instances of the class or retrieve some global property of the class.
creating an initializer

28. SomeClass* aVariable = [[SomeClass alloc] init]; is an example of what kind of instance?
Instantiation from scratch
only the innermost loop in which the break is executed is terminated
Data Encapsulation
class methods - initializers

29. What does autorelease mean?
self
pointer - class
wait until the loop finishes processing the event - at the end release it
nil

30. In object oriented languages - we call methods that get and set instance variables accessors - individually we call them...

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31. The object to which a message is sent - the receiver can be referred to as self from inside the method that is invoked
creates an instance of NSString that holds the character string
NSCoder
receiver
protocol

32. In any application with UINavigationController - the navigation controller...
class
has one root view controller
is an instance of that class
the message release to all its entries

33. Delegation is an object oriented approach to
the instance variables
class methods - initializers
callbacks
rectangular

34. 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 _.
instance variable of an object is valid
protocol
selector[message]
subview(s)

35. NSString *s = @'Hello - World'; is an example of...
message
instance of UIView or one of its subclasses
declaration and initialization of a variable
has one root view controller

36. Also if you send the NSObject the _ message - you own that object.
(id)initWithFrame:(CGRect)aRect;
calling code that does the instantiation for you
retain
only the class and subclasses can access

37. NSString* s2 = [s uppercase String]; Is an example of what kind of instance?
viewWillDissapear: and viewWillAppear:
Ready-Made Instance
they need to be defined in the implementation file
accessors - individually we call them 'getters' and 'setters'

38. Any individual object belonging to any class...
instance variables
is an instance of that class
view
methods

39. When an object is added to a NSMutableArray - that object is sent the message to retain;...
methods for generating an instance
the array becomes an owner of that object and has a pointer to it.
view
retain

40. A view is a subclass of _
values
UIView
methods
self

41. A UITableView usually needs three different pieces...
data source - delegate and view controller
receiver - selector - arguments
new instances of the class or retrieve some global property of the class.
UIView

42. Asking a class or object to execute a method
initializers
message
Data Encapsulation
for inheritance - adopting the superclasses implementation

43. Each class picks one _ as it's designated initializer....
instance
initializer
instance variables
in the dealloc - or when a Controller's view is 'unloaded'

44. A view represents a _ area
UIView
initializers
ready-made instances - instantiation from scratch - and nib based instantiation
rectangular

45. A class inherits all _ from its superclass and can add as many as it wants for its own purposes....
delegates and dataSources
reuse your cells
define it in the implemenation file
initializers

46. Also - because arrays only hold a pointer to an object...
variable scope - if defined within a block
callbacks
a single-array can contain objects of different types
data source - delegate and view controller

47. In Objective C arrays can hold only...
references to objects
instance variables
retain
pointer to an object

48. All objects are accessed using...
creating an initializer
pointers
Functions
reuse your cells

49. Designated initializer makes sure that every...
instance of UIView or one of its subclasses
values
upper
instance variable of an object is valid

50. If you have extra work you want to do on the view...
create a XIB file
do so in viewDidLoad
pointer to an object
NSLog routine

Can you answer 50 questions in 15 minutes?

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iOS 5 App Development Objective C

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