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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. super - is used...
collection of collections - NSArray of an NSArray
for inheritance - adopting the superclasses implementation
C Functionn
values

2. A UITableView usually needs three different pieces...
position
accessors - individually we call them 'getters' and 'setters'
setPossessionName
data source - delegate and view controller

3. if you implemented both the setter and getter - the @synthesize method...
Instantiation from scratch
will be ignored
the message release to all its entries
arguments[message]

4. The only reason to temporarily own an object - is...
create a XIB file
to give it someone else - or another object
Abstraction
accessors - individually we call them 'getters' and 'setters'

5. Class methods do not operate on an _ or have any access to _ variables....
references to objects
instance
receiver
designated initializer

6. 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 _.
only the class and subclasses can access
methods
pointer - class
CGFloat

7. NSArray - class...
ordered collection of objects - immutable
implementation
CGFloat
values

8. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern
@interface ClassName:SuperClassName
ready-made instances - instantiation from scratch - and nib based instantiation
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
copy - retain

9. Hold data and know nothing about the user interface
callbacks
Model Objects[Factory Worker]
accessors - individually we call them 'getters' and 'setters'
Abstraction

10. Any other initializer a class has calls the _ designated initializer....
receiver[message]
class's
object
@interface ClassName:SuperClassName

11. UIView - designated initializer...
(id)initWithFrame:(CGRect)aRect;
Is a placeholder object
Functions
they need to be defined in the implementation file

12. Three ways instances are created...
pointer - class
ready-made instances - instantiation from scratch - and nib based instantiation
initializers
UIViewController

13. C struct with a CGPoint origin and a CGSize size - in other words two c structs.
%d
array[class - NSMutableArray]
CGRect
creates an instance of NSString that holds the character string

14. @property declares - and _ implements the setter and getter...
data source - view controller and delegate
is an instance of that class
@synthesize
receiver - selector - arguments

15. What does autorelease mean?
You take ownership for an object you want to keep a pointer to
wait until the loop finishes processing the event - at the end release it
group of global functions already assigned to this class
view controller's initialization method

16. Name of the new class - it's superclass - the instance variables that each instance of this class has - and any methods this class implements
values
header files declare
setPossessionName
UIViewController

17. Asking a class or object to execute a method
Continue
new instances of the class or retrieve some global property of the class.
message
alloc - singleton - informational utility method?

18. Files Owner...
do so in viewDidLoad
only the class and subclasses can access
declaration and initialization of a variable
Is a placeholder object

19. Variable names tend to start with a _ letter; class names tend to start with an _ letter.
Ready-Made Instance
lowercase - uppercase
%d
data source - delegate and view controller

20. An instance is a device for maintaining state. It's a box for _ of data.
Object wrapper around primitive types like int - float - double - BOOl
setPossessionName
storage
Generic object wrapper for other non-object data types

21. A class inherits all _ from its superclass and can add as many as it wants for its own purposes....
Continue
Maintenance of state
initializers
initializer

22. [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.
Anytime you call a method with new - alloc or copy. You own and must release that object.
safety - subclassability and makes code look more consistent with C structs
instance variables
data

23. UIViewController has several methods that get called at certain times...
CF - Ref
Abstraction
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
Generic object wrapper for other non-object data types

24. Any individual object belonging to any class...
to give it someone else - or another object
receiver[message]
implementation
is an instance of that class

25. Primitives and C Structures...
for inheritance - adopting the superclasses implementation
parentViewController
cannot be added to an array
instance of UIView or one of its subclasses

26. If the view has no subviews - create it programmatically; if it has subviews
instance variables
new instances of the class or retrieve some global property of the class.
position
create a XIB file

27. In any application with UINavigationController - the navigation controller...
initializers
has one root view controller
creating an initializer
Core Graphics Framework

28. A view is an...
alloc - singleton - informational utility method?
only the innermost loop in which the break is executed is terminated
instance of UIView or one of its subclasses
designated initializer

29. Order of the declarations for methods. _ come first - followed by _ - followed by any other methods...
is called every time the event occurs
CGRect bounds - GCPoint center - CGRect frame
alloc - singleton - informational utility method?
class methods - initializers

30. When overriding a method - all you need to is _ - you do not need to declare it in the header file because it has already been declared by the superclass....
define it in the implemenation file
subview(s)
type - name and value
instance of UIView or one of its subclasses

31. @property - is using methods...
has one root view controller
create a XIB file
to get and set variables
receiver - selector - arguments

32. NSDate - class...
Used to find the time right now or to store past or future time/dates
Anytime you call a method with new - alloc or copy. You own and must release that object.
copy - retain
%d

33. What happens when the last owner calls release?
instance variable of an object is valid
dealloc - is called on the object & the object's memory is returned to the heap
Maintenance of state
self

34. Each _ has a 'designated' initializer method....
class
group of global functions already assigned to this class
is an instance of that class
Encapsulation of functionality

35. All objects are accessed using...
view controller
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
pointers
view

36. We can use dot notation to reference...
viewWillDissapear: and viewWillAppear:
an object's property
to give it someone else - or another object
Hash table - Look up objects using a key to get a value.

37. 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...
UIView
method
setPossessionName
cannot be added to an array

38. If a class declares a _ that is different from its superclass - you must override the superclass' _ to call the new _...
Anytime you call a method with new - alloc or copy. You own and must release that object.
protocol
designated initializer
implementation

39. Name of the method to be executed
pointers
only the class and subclasses can access
selector[message]
initializers

40. Each object does its own job - and presents to the rest of the world - to other objects - and indeed in a sense to the programmer - an opaque wall whose only entrances are the methods to which it promises to respond and the actions it promises to per
instance variables
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
a mechanism to enable specific callbacks
Encapsulation of functionality

41. Class methods typically either create
implementation
new instances of the class or retrieve some global property of the class.
wait until the loop finishes processing the event - at the end release it
CGFloat

42. A set of variables and associated methods. An object can be sent messages to cause one of its methods to be executed.
object
its dataSource
Instantiation from scratch
lowercase - uppercase

43. Also if you send the NSObject the _ message - you own that object.
retain
protocol
in the dealloc - or when a Controller's view is 'unloaded'
instance variable of an object is valid

44. When do we need to release our outlets?
calling code that does the instantiation for you
is called every time the event occurs
in the dealloc - or when a Controller's view is 'unloaded'
type - name and value

45. Archiving works by creating an instance of _ - which is essentially just a container for data - and placing objects and their data inside it.
Used to find the time right now or to store past or future time/dates
declaration and initialization of a variable
viewWillDissapear: and viewWillAppear:
NSCoder

46. A view represents a _ area
a single-array can contain objects of different types
rectangular
will be ignored
dealloc - is called on the object & the object's memory is returned to the heap

47. 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
initializer
implementation
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear

48. NSValue - class...
ordered collection of objects - immutable
Generic object wrapper for other non-object data types
viewWillDissapear: and viewWillAppear:
parentViewController

49. Keep view and model objects in sync - control the 'flow' of the application - and save the model objects out to the filesystem
Maintenance of state
receiver - selector - arguments
Controller Objects[Managers]
protocol

50. When an object is removed from an NSMutableArray - that object is sent the message release;...
the array relinquishes ownership of that object and no longer has a pointer to it
is called every time the event occurs
you must import the header file of that class
creates an instance of NSString that holds the character string

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iOS 5 App Development Objective C

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