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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. Center and frame are used to _ your view
retain
variable scope - if defined within a block
position
you must import the header file of that class

2. In the last line of an init method...
Abstraction
you always return the newly initialized object(return self)
collection of collections - NSArray of an NSArray
viewWillDissapear: and viewWillAppear:

3. NSDate - class...
Used to find the time right now or to store past or future time/dates
to get and set variables
the instance variables
a mechanism to enable specific callbacks

4. Use of class methods - there are three...
rectangular
alloc - singleton - informational utility method?
the message release to all its entries
will be ignored

5. initWithFrame: the designated initializer for UIView gives the view
size and position
to get and set variables
Object wrapper around primitive types like int - float - double - BOOl
(id)initWithFrame:(CGRect)aRect;

6. UIViewController has several methods that get called at certain times...
methods
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
self
parentViewController

7. When do you take ownership?...
Anytime you call a method with new - alloc or copy. You own and must release that object.
(id)initWithFrame:(CGRect)aRect;
callbacks
header files declare

8. In object oriented languages - we call methods that get and set instance variables
parentViewController
Generic object wrapper for other non-object data types
size and position
accessors - individually we call them 'getters' and 'setters'

9. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern
to give it someone else - or another object
receiver - selector - arguments
@interface ClassName:SuperClassName
reuse your cells

10. Class methods typically either create
instance variables
pointer - class
new instances of the class or retrieve some global property of the class.
delegates and dataSources

11. @property - is using methods...
instance variables
to get and set variables
NSCoder
first responder

12. 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 _.
arguments[message]
C Functionn
subview(s)
CGRect

13. Ready-made instances...
calling code that does the instantiation for you
instance variables
CF - Ref
alloc - singleton - informational utility method?

14. Reducing details to focus on the core concepts
Continue
parentViewController
only the class and subclasses can access
Abstraction

15. Hold data and know nothing about the user interface
the array becomes an owner of that object and has a pointer to it.
Model Objects[Factory Worker]
dealloc - is called on the object & the object's memory is returned to the heap
is called every time the event occurs

16. Why properties?
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
safety - subclassability and makes code look more consistent with C structs
superclass's
attributes - behavior

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.
creating an initializer
implementation
delegates and dataSources
object

18. Name of the new class - it's superclass - the instance variables that each instance of this class has - and any methods this class implements
header files declare
%d
dealloc - is called on the object & the object's memory is returned to the heap
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject

19. A function in the objective c library that simply displays or logs it's argument
receiver[message]
NSLog routine
(id)initWithFrame:(CGRect)aRect;
define it in the implemenation file

20. Core foundation classes are prefixed with _ and suffixed with _
creates an instance of NSString that holds the character string
copy - retain
in the dealloc - or when a Controller's view is 'unloaded'
CF - Ref

21. The designated initializer calls the _ designated initializer....
Core Graphics Framework
superclass's
methods
define it in the implemenation file

22. Prefixing a character string with an @ symbol [specific - NSString class]...
nil
NSCoder
receiver[message]
creates an instance of NSString that holds the character string

23. A responder is responsible for...
receiving and handling events that are associated with it
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
Used to find the time right now or to store past or future time/dates
the array becomes an owner of that object and has a pointer to it.

24. A class inherits all _ from its superclass and can add as many as it wants for its own purposes....
the array relinquishes ownership of that object and no longer has a pointer to it
Object wrapper around primitive types like int - float - double - BOOl
initializers
ordered collection of objects - immutable

25. Property List...
Instantiation from scratch
the message release to all its entries
for inheritance - adopting the superclasses implementation
collection of collections - NSArray of an NSArray

26. We can use dot notation to reference...
new instances of the class or retrieve some global property of the class.
an object's property
implementation
do so in viewDidLoad

27. Also - because arrays only hold a pointer to an object...
upper
for inheritance - adopting the superclasses implementation
a single-array can contain objects of different types
Controller Objects[Managers]

28. A view is a subclass of _
NSCoder
you always return the newly initialized object(return self)
UIView
wait until the loop finishes processing the event - at the end release it

29. Each _ has a 'designated' initializer method....
rectangular
class methods - initializers
instance variables
class

30. Number one use of protocols in iOS...
delegates and dataSources
ordered collection of objects - immutable
Data Encapsulation
receiver

31. class methods...
an object's property
new instances of the class or retrieve some global property of the class.
group of global functions already assigned to this class
they need to be defined in the implementation file

32. Any other initializer a class has calls the _ designated initializer....
the array becomes an owner of that object and has a pointer to it.
declaration and initialization of a variable
class's
pointer - class

33. C struct with a CGPoint origin and a CGSize size - in other words two c structs.
upper
Anytime you call a method with new - alloc or copy. You own and must release that object.
CGRect
in the dealloc - or when a Controller's view is 'unloaded'

34. Archiving works by creating an instance of _ - which is essentially just a container for data - and placing objects and their data inside it.
position
NSCoder
Generic object wrapper for other non-object data types
upper

35. An instance is a device for maintaining state. It's a box for _ of data.
subview(s)
instance variables
delegates and dataSources
storage

36. Instance Variables by default are called @protected meaning...
only the class and subclasses can access
creating an initializer
nil
instance of UIView or one of its subclasses

37. In general - class methods tend to be factory methods - that is...
setPossessionName
methods for generating an instance
Core Graphics Framework
pointer to an object

38. The class is responsible for what instance variables the instance has - but not the _ of those variables.
define it in the implemenation file
values
data source - view controller and delegate
Generic object wrapper for other non-object data types

39. When an NSMutableArray is deallocated - it sends...
its dataSource
the message release to all its entries
CF - Ref
create a XIB file

40. id is a...
view controller's initialization method
instance variables
pointer to an object
Encapsulation of functionality

41. NSArray - important methods...
only the class and subclasses can access
variable scope - if defined within a block
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
Continue

42. Values to be supplied as the parameters to the method
class methods - initializers
%d
subview(s)
arguments[message]

43. A collection object - an ordered list of objects that can be accesed by an index
array[class - NSMutableArray]
instance of UIView or one of its subclasses
receiver
its dataSource

44. NSArray - class...
ordered collection of objects - immutable
view controller's initialization method
Generic object wrapper for other non-object data types
implementation

45. A callback is a function that is supplied in advance of an event - and...
is called every time the event occurs
pointer to an object
initializer
Model Objects[Factory Worker]

46. Asking a class or object to execute a method
CF - Ref
message
Data Encapsulation
define it in the implemenation file

47. Order of the declarations for methods. _ come first - followed by _ - followed by any other methods...
selector[message]
accessors - individually we call them 'getters' and 'setters'
class's
class methods - initializers

48. NSValue - class...
CGFloat
Generic object wrapper for other non-object data types
UIView
self

49. Never access a view controller's view in that...
view controller's initialization method
in the dealloc - or when a Controller's view is 'unloaded'
implementation
Data Encapsulation

50. Proceed through the loop - jump back to the top and check again
Continue
group of global functions already assigned to this class
message
draw images

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iOS 5 App Development Objective C

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