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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. UIImageView is used to...
draw images
ready-made instances - instantiation from scratch - and nib based instantiation
arguments[message]
attributes - behavior

2. Why properties?
Encapsulation of functionality
safety - subclassability and makes code look more consistent with C structs
lowercase - uppercase
new instances of the class or retrieve some global property of the class.

3. A view is an...
data
CGRect bounds
instance of UIView or one of its subclasses
message

4. NSArray - important methods...
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
only the innermost loop in which the break is executed is terminated
CGRect bounds - GCPoint center - CGRect frame
instance variables

5. The class is responsible for what instance variables the instance has - but not the _ of those variables.
copy - retain
values
you always return the newly initialized object(return self)
object

6. A UITableViewController can fill all three roles of...
the message release to all its entries
data source - view controller and delegate
CGRect bounds
references to objects

7. A responder is responsible for...
receiving and handling events that are associated with it
attributes - behavior
dealloc - is called on the object & the object's memory is returned to the heap
retain

8. A _ handles touch events.
Hash table - Look up objects using a key to get a value.
to get and set variables
instance variables
view

9. A set of variables and associated methods. An object can be sent messages to cause one of its methods to be executed.
NSLog routine
object
Data Encapsulation
the message release to all its entries

10. Object Oriented based analogue to a function is called a...
size and position
position
method
pointer - class

11. id is a...
callbacks
NSCoder
create a XIB file
pointer to an object

12. 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
values
Maintenance of state
in the dealloc - or when a Controller's view is 'unloaded'

13. In a class method you cannot access...
attributes - behavior
class
create a XIB file
the instance variables

14. Each _ has a 'designated' initializer method....
only the innermost loop in which the break is executed is terminated
class
%d
they need to be defined in the implementation file

15. Core foundation classes are prefixed with _ and suffixed with _
storage
Used to find the time right now or to store past or future time/dates
CF - Ref
causes the program to immediately exit from the loop it is executing - whether its for - while or do

16. 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
a mechanism to enable specific callbacks
view
callbacks
size and position

17. What does autorelease mean?
callbacks
wait until the loop finishes processing the event - at the end release it
arguments[message]
parentViewController

18. When an object is removed from an NSMutableArray - that object is sent the message release;...
(id)initWithFrame:(CGRect)aRect;
causes the program to immediately exit from the loop it is executing - whether its for - while or do
the array relinquishes ownership of that object and no longer has a pointer to it
selector[message]

19. NSValue - class...
Anytime you call a method with new - alloc or copy. You own and must release that object.
the array becomes an owner of that object and has a pointer to it.
subview(s)
Generic object wrapper for other non-object data types

20. C struct with a CGPoint origin and a CGSize size - in other words two c structs.
for inheritance - adopting the superclasses implementation
Used to find the time right now or to store past or future time/dates
methods for generating an instance
CGRect

21. A method in a _ is required unless its preceded by an @optional.
rectangular
callbacks
storage
protocol

22. NSString *s = @'Hello - World'; is an example of...
declaration and initialization of a variable
%d
position
you always return the newly initialized object(return self)

23. A collection object - an ordered list of objects that can be accesed by an index
@synthesize
Used to find the time right now or to store past or future time/dates
array[class - NSMutableArray]
draw images

24. A block of statements identified by a name that can accept one or more arguments passed to it by value and can optionally return a value
NSBundle
Functions
attributes - behavior
do so in viewDidLoad

25. Property List...
Ready-Made Instance
NSCoder
draw images
collection of collections - NSArray of an NSArray

26. If a class declares a _ that is different from its superclass - you must override the superclass' _ to call the new _...
designated initializer
unordered collection of objects - objects must be unique
nil
is an instance of that class

27. If you have extra work you want to do on the view...
method
initializers
Ready-Made Instance
do so in viewDidLoad

28. Inside a method - _ is an implicit local variable. Typically - _ is used so that an object can send a message to itself....
self
CGRect bounds - GCPoint center - CGRect frame
data source - delegate and view controller
a single-array can contain objects of different types

29. NSDate - class...
references to objects
ready-made instances - instantiation from scratch - and nib based instantiation
implementation
Used to find the time right now or to store past or future time/dates

30. Never access a view controller's view in that...
Core Graphics Framework
is called every time the event occurs
view controller's initialization method
Encapsulation of functionality

31. When an object is added to a NSMutableArray - that object is sent the message to retain;...
the array becomes an owner of that object and has a pointer to it.
to give it someone else - or another object
ordered collection of objects - immutable
attributes - behavior

32. The designated initializer calls the _ designated initializer....
'getters' and 'setters'
superclass's
lowercase - uppercase
to get and set variables

33. Number one use of protocols in iOS...
pointers
delegates and dataSources
Abstraction
subview(s)

34. if you implemented both the setter and getter - the @synthesize method...
new instances of the class or retrieve some global property of the class.
variable scope - if defined within a block
lowercase - uppercase
will be ignored

35. 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 _.
a mechanism to enable specific callbacks
pointer - class
storage
only the innermost loop in which the break is executed is terminated

36. In Cocoa Touch - the table view asks another object _ what it should display...
parentViewController
in the dealloc - or when a Controller's view is 'unloaded'
data
its dataSource

37. NSSet...
receiver - selector - arguments
unordered collection of objects - objects must be unique
Ready-Made Instance
lowercase - uppercase

38. Asking a class or object to execute a method
the message release to all its entries
message
instance of UIView or one of its subclasses
array[class - NSMutableArray]

39. Order of the declarations for methods. _ come first - followed by _ - followed by any other methods...
Controller Objects[Managers]
to give it someone else - or another object
message
class methods - initializers

40. 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
Functions
Maintenance of state
the array becomes an owner of that object and has a pointer to it.
the array relinquishes ownership of that object and no longer has a pointer to it

41. initWithFrame: the designated initializer for UIView gives the view
new instances of the class or retrieve some global property of the class.
is an instance of that class
rectangular
size and position

42. To get the full path for a directory in the sandbox - you use the _ NSSearchPathForDirectoriesInDomains.
C Functionn
view controller's initialization method
wait until the loop finishes processing the event - at the end release it
to give it someone else - or another object

43. Name of the method to be executed
setPossessionName
Data Encapsulation
NSCoder
selector[message]

44. In the last line of an init method...
lowercase - uppercase
data source - view controller and delegate
you always return the newly initialized object(return self)
the array becomes an owner of that object and has a pointer to it.

45. To load a Xib file manually - you use _
CGFloat
to get and set variables
NSBundle
new instances of the class or retrieve some global property of the class.

46. Each class picks one _ as it's designated initializer....
retain
selector[message]
initializer
implementation

47. A callback is a function that is supplied in advance of an event - and...
in the dealloc - or when a Controller's view is 'unloaded'
is called every time the event occurs
declaration and initialization of a variable
self

48. Classes describe two things...
selector[message]
attributes - behavior
upper
Instantiation from scratch

49. Use of class methods - there are three...
Hash table - Look up objects using a key to get a value.
nil
alloc - singleton - informational utility method?
ready-made instances - instantiation from scratch - and nib based instantiation

50. 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.
instance variables
they need to be defined in the implementation file
selector[message]
implementation

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iOS 5 App Development Objective C

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