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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. Archiving works by creating an instance of _ - which is essentially just a container for data - and placing objects and their data inside it.
nil
collection of collections - NSArray of an NSArray
NSCoder
subview(s)

2. The root view controller typically creates the next view controller - and the next _ creates the one after that
data source - delegate and view controller
view controller
a single-array can contain objects of different types
receiver[message]

3. 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.
self
creating an initializer
delegates and dataSources
ready-made instances - instantiation from scratch - and nib based instantiation

4. Only exists within the statement block there defined - outside of the block is fine
in the dealloc - or when a Controller's view is 'unloaded'
Continue
Is a placeholder object
variable scope - if defined within a block

5. The designated initializer calls the _ designated initializer....

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6. A view is an...
instance of UIView or one of its subclasses
copy - retain
ordered collection of objects - immutable
header files declare

7. NSString* s2 = [s uppercase String]; Is an example of what kind of instance?
new instances of the class or retrieve some global property of the class.
CGRect
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
Ready-Made Instance

8. Core foundation classes are prefixed with _ and suffixed with _
arguments[message]
draw images
CF - Ref
callbacks

9. if you implemented both the setter and getter - the @synthesize method...
ready-made instances - instantiation from scratch - and nib based instantiation
will be ignored
for inheritance - adopting the superclasses implementation
@interface ClassName:SuperClassName

10. The class is responsible for what instance variables the instance has - but not the _ of those variables.
creates an instance of NSString that holds the character string
pointers
view controller's initialization method
values

11. A message is always contained in square brackets - and has three parts
data source - view controller and delegate
receiver - selector - arguments
a mechanism to enable specific callbacks
calling code that does the instantiation for you

12. A _ handles touch events.
data source - delegate and view controller
draw images
selector[message]
view

13. A UITableView usually needs three different pieces...
data source - delegate and view controller
the message release to all its entries
Is a placeholder object
methods

14. 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.
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
array[class - NSMutableArray]
implementation
collection of collections - NSArray of an NSArray

15. Property List...
retain
causes the program to immediately exit from the loop it is executing - whether its for - while or do
collection of collections - NSArray of an NSArray
lowercase - uppercase

16. When an NSMutableArray is deallocated - it sends...
viewWillDissapear: and viewWillAppear:
array[class - NSMutableArray]
the message release to all its entries
Ready-Made Instance

17. Values to be supplied as the parameters to the method
its dataSource
arguments[message]
ordered collection of objects - immutable
Functions

18. Hold data and know nothing about the user interface
instance
a single-array can contain objects of different types
Generic object wrapper for other non-object data types
Model Objects[Factory Worker]

19. A command directed to an object is called an...
first responder
unordered collection of objects - objects must be unique
storage
message

20. NSDictionary...
cannot be added to an array
Hash table - Look up objects using a key to get a value.
NSLog routine
size and position

21. Delegation is an object oriented approach to
callbacks
CGRect bounds
the array relinquishes ownership of that object and no longer has a pointer to it
calling code that does the instantiation for you

22. After accessors have been defined in the header file...
'getters' and 'setters'
they need to be defined in the implementation file
a single-array can contain objects of different types
retain

23. Classes describe two things...
a single-array can contain objects of different types
reuse your cells
UIView
attributes - behavior

24. Designated initializer makes sure that every...
an object's property
instance variable of an object is valid
view
for inheritance - adopting the superclasses implementation

25. [Instance Variables] The code it gets from its class and in a sense is shared with all other instances of that class - but the _ belong to it alone.
data
array[class - NSMutableArray]
variable scope - if defined within a block
methods

26. Also - because arrays only hold a pointer to an object...
self
a single-array can contain objects of different types
initializer
lowercase - uppercase

27. NSValue - class...
Generic object wrapper for other non-object data types
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
instance variables
data source - view controller and delegate

28. NSString *s = @'Hello - World'; is an example of...
you must import the header file of that class
Used to find the time right now or to store past or future time/dates
declaration and initialization of a variable
object

29. A UITableViewController can fill all three roles of...
they need to be defined in the implementation file
data source - view controller and delegate
unordered collection of objects - objects must be unique
its dataSource

30. A function in the objective c library that simply displays or logs it's argument
NSBundle
receiver[message]
NSLog routine
values

31. Asking a class or object to execute a method
superclass's
message
will be ignored
upper

32. Name of the new class - it's superclass - the instance variables that each instance of this class has - and any methods this class implements
CGRect
header files declare
they need to be defined in the implementation file
super - self

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

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34. A method in a _ is required unless its preceded by an @optional.
protocol
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
position
UIViewController

35. C struct with a CGPoint origin and a CGSize size - in other words two c structs.
Object wrapper around primitive types like int - float - double - BOOl
CGRect
variable scope - if defined within a block
rectangular

36. Order of the declarations for methods. _ come first - followed by _ - followed by any other methods...
new instances of the class or retrieve some global property of the class.
only the innermost loop in which the break is executed is terminated
receiver
class methods - initializers

37. Inside a method - _ is an implicit local variable. Typically - _ is used so that an object can send a message to itself....
receiver - selector - arguments
an object's property
do so in viewDidLoad
self

38. Keep view and model objects in sync - control the 'flow' of the application - and save the model objects out to the filesystem
cannot be added to an array
arguments[message]
Controller Objects[Managers]
'getters' and 'setters'

39. You use _ to implement the view
safety - subclassability and makes code look more consistent with C structs
CGRect bounds
Continue
method

40. @property - is using methods...
Continue
to get and set variables
do so in viewDidLoad
an object's property

41. 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.
safety - subclassability and makes code look more consistent with C structs
references to objects
data source - delegate and view controller
first responder

42. class methods...
view
instance variables
ordered collection of objects - immutable
group of global functions already assigned to this class

43. When do you take ownership?...
rectangular
Anytime you call a method with new - alloc or copy. You own and must release that object.
receiving and handling events that are associated with it
self

44. If a class declares a _ that is different from its superclass - you must override the superclass' _ to call the new _...
Ready-Made Instance
designated initializer
is called every time the event occurs
instance variables

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

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46. Center and frame are used to _ your view
NSCoder
retain
the array relinquishes ownership of that object and no longer has a pointer to it
position

47. When do we need to release our outlets?

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48. In Cocoa Touch - the table view asks another object _ what it should display...
its dataSource
pointer to an object
Abstraction
create a XIB file

49. 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
'getters' and 'setters'
Instantiation from scratch
Maintenance of state
declaration and initialization of a variable

50. Defining variables - three parts...
view controller
implementation
type - name and value
header files declare

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iOS 5 App Development Objective C

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