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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. Core foundation classes are prefixed with _ and suffixed with _
rectangular
CF - Ref
%d
object

2. Views have three properties related to their location and size: @property _ _;
CGRect bounds - GCPoint center - CGRect frame
data
view controller's initialization method
will be ignored

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

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4. The root view controller typically creates the next view controller - and the next _ creates the one after that
methods for generating an instance
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
view controller
variable scope - if defined within a block

5. A view is a subclass of _
data source - view controller and delegate
first responder
class methods - initializers
UIView

6. If you have extra work you want to do on the view...
do so in viewDidLoad
creates an instance of NSString that holds the character string
self
UIViewController

7. The integer prefix is...
new instances of the class or retrieve some global property of the class.
NSLog routine
%d
message

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

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9. The object to which a message is sent - the receiver can be referred to as self from inside the method that is invoked
receiver
CGFloat
protocol
object

10. Values to be supplied as the parameters to the method
they need to be defined in the implementation file
ordered collection of objects - immutable
arguments[message]
create a XIB file

11. The class is responsible for what instance variables the instance has - but not the _ of those variables.
nil
data source - delegate and view controller
values
only the innermost loop in which the break is executed is terminated

12. Files Owner...
selector[message]
define it in the implemenation file
for inheritance - adopting the superclasses implementation
Is a placeholder object

13. When the message endEditing: is sent to a view - if it or any of its subviews or currently the _ - it will resign its first responder statues - and the keyboard will be dismissed.
first responder
receiver
(id)initWithFrame:(CGRect)aRect;
Hash table - Look up objects using a key to get a value.

14. When do we need to release our outlets?

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15. Origin of a view's coordinate system is _ left
superclass's
upper
ready-made instances - instantiation from scratch - and nib based instantiation
protocol

16. Reducing details to focus on the core concepts
Abstraction
pointer to an object
Object wrapper around primitive types like int - float - double - BOOl
dealloc - is called on the object & the object's memory is returned to the heap

17. NSSet...
dealloc - is called on the object & the object's memory is returned to the heap
ordered collection of objects - immutable
data source - view controller and delegate
unordered collection of objects - objects must be unique

18. 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 _.
unordered collection of objects - objects must be unique
the instance variables
pointer - class
data

19. What does autorelease mean?
data source - delegate and view controller
wait until the loop finishes processing the event - at the end release it
instance
will be ignored

20. 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)
ordered collection of objects - immutable
@interface ClassName:SuperClassName
to get and set variables

21. Hold data and know nothing about the user interface
Model Objects[Factory Worker]
storage
the array becomes an owner of that object and has a pointer to it.
implementation

22. A _ handles touch events.
CGRect bounds - GCPoint center - CGRect frame
view
@synthesize
Instantiation from scratch

23. NSString *s = @'Hello - World'; is an example of...
array[class - NSMutableArray]
view
declaration and initialization of a variable
is called every time the event occurs

24. When an object is added to a NSMutableArray - that object is sent the message to retain;...
pointer - class
the array becomes an owner of that object and has a pointer to it.
storage
Anytime you call a method with new - alloc or copy. You own and must release that object.

25. A responder is responsible for...
receiving and handling events that are associated with it
receiver[message]
receiver
ordered collection of objects - immutable

26. If a break statement is executed from within a set of nested loops...
only the innermost loop in which the break is executed is terminated
safety - subclassability and makes code look more consistent with C structs
rectangular
first responder

27. 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
Object wrapper around primitive types like int - float - double - BOOl
message
data

28. A class inherits all _ from its superclass and can add as many as it wants for its own purposes....
initializers
Maintenance of state
receiver[message]
type - name and value

29. NSArray - important methods...
initializers
the array becomes an owner of that object and has a pointer to it.
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
Encapsulation of functionality

30. 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
parentViewController
attributes - behavior
@interface ClassName:SuperClassName
Functions

31. Prefixing a character string with an @ symbol [specific - NSString class]...
C Functionn
wait until the loop finishes processing the event - at the end release it
an object's property
creates an instance of NSString that holds the character string

32. In any application with UINavigationController - the navigation controller...
methods for generating an instance
'getters' and 'setters'
has one root view controller
the instance variables

33. Why properties?
new instances of the class or retrieve some global property of the class.
NSLog routine
receiver[message]
safety - subclassability and makes code look more consistent with C structs

34. Asking a class or object to execute a method
view controller
class's
data
message

35. Three ways instances are created...
type - name and value
Anytime you call a method with new - alloc or copy. You own and must release that object.
instance
ready-made instances - instantiation from scratch - and nib based instantiation

36. Each class picks one _ as it's designated initializer....
initializer
the instance variables
super - self
delegates and dataSources

37. A message is always contained in square brackets - and has three parts
receiver - selector - arguments
to get and set variables
draw images
the instance variables

38. if you implemented both the setter and getter - the @synthesize method...
the message release to all its entries
Continue
will be ignored
'getters' and 'setters'

39. Also - because arrays only hold a pointer to an object...
a single-array can contain objects of different types
You take ownership for an object you want to keep a pointer to
Generic object wrapper for other non-object data types
upper

40. At the top of any implementation file...
unordered collection of objects - objects must be unique
instance variable of an object is valid
C Functionn
you must import the header file of that class

41. When an NSMutableArray is deallocated - it sends...
the message release to all its entries
implementation
Instantiation from scratch
message

42. Class methods do not operate on an _ or have any access to _ variables....
instance
causes the program to immediately exit from the loop it is executing - whether its for - while or do
%d
attributes - behavior

43. The designated initializer calls the _ designated initializer....

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44. Designated initializer makes sure that every...
Model Objects[Factory Worker]
instance variable of an object is valid
UIView
calling code that does the instantiation for you

45. NSDictionary...
to get and set variables
Hash table - Look up objects using a key to get a value.
cannot be added to an array
method

46. Name of the method to be executed
Controller Objects[Managers]
the array relinquishes ownership of that object and no longer has a pointer to it
type - name and value
selector[message]

47. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern
instance variable of an object is valid
CF - Ref
Core Graphics Framework
@interface ClassName:SuperClassName

48. NSNumber - class...
Object wrapper around primitive types like int - float - double - BOOl
causes the program to immediately exit from the loop it is executing - whether its for - while or do
instance
@synthesize

49. id is a...
wait until the loop finishes processing the event - at the end release it
Generic object wrapper for other non-object data types
You take ownership for an object you want to keep a pointer to
pointer to an object

50. Class methods typically either create
new instances of the class or retrieve some global property of the class.
data source - delegate and view controller
CGRect bounds
position

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iOS 5 App Development Objective C

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