Instructions:

• Answer 50 questions in 15 minutes.
• If you are not ready to take this test, you can study here.
• 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. NSValue - class...
a single-array can contain objects of different types
you always return the newly initialized object(return self)
an object's property
Generic object wrapper for other non-object data types


2. What does autorelease mean?
C Functionn
variable scope - if defined within a block
values
wait until the loop finishes processing the event - at the end release it


3. A function in the objective c library that simply displays or logs it's argument
@interface ClassName:SuperClassName
receiver
calling code that does the instantiation for you
NSLog routine


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

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5. 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
Encapsulation of functionality
viewWillDissapear: and viewWillAppear:
in the dealloc - or when a Controller's view is 'unloaded'
you must import the header file of that class


6. NSString objects are usually sent _ rather than _...
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
Continue
pointer - class
copy - retain


7. 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 _.
references to objects
subview(s)
Controller Objects[Managers]
pointer - class


8. The integer prefix is...
%d
ready-made instances - instantiation from scratch - and nib based instantiation
C Functionn
Abstraction


9. id is a...
pointer to an object
method
(id)initWithFrame:(CGRect)aRect;
instance variable of an object is valid


10. When you send a message to _ - you are sending a message to _ - but demanding that the search for the method begin at the superclass....
accessors - individually we call them 'getters' and 'setters'
super - self
Core Graphics Framework
create a XIB file


11. SomeClass* aVariable = [[SomeClass alloc] init]; is an example of what kind of instance?
they need to be defined in the implementation file
Instantiation from scratch
message
receiving and handling events that are associated with it


12. The object to which a message is sent - the receiver can be referred to as self from inside the method that is invoked
delegates and dataSources
message
receiver
a single-array can contain objects of different types


13. @property - is using methods...
wait until the loop finishes processing the event - at the end release it
instance
super - self
to get and set variables


14. To load a Xib file manually - you use _
delegates and dataSources
NSCoder
NSBundle
cannot be added to an array


15. The designated initializer calls the _ designated initializer....

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16. UIViewController has several methods that get called at certain times...
viewWillAppear - viewDidAppear - viewWillDisappear & viewDidDisappear
instance
creates an instance of NSString that holds the character string
'getters' and 'setters'


17. Each class picks one _ as it's designated initializer....
variable scope - if defined within a block
class methods - initializers
accessors - individually we call them 'getters' and 'setters'
initializer


18. 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
instance
Instantiation from scratch
(id)initWithFrame:(CGRect)aRect;


19. Order of the declarations for methods. _ come first - followed by _ - followed by any other methods...
data source - delegate and view controller
class methods - initializers
data
references to objects


20. @property declares - and _ implements the setter and getter...
Functions
@synthesize
instance variable of an object is valid
do so in viewDidLoad


21. 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
designated initializer
lowercase - uppercase
calling code that does the instantiation for you


22. When do we need to release our outlets?

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23. 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 _.
methods
nil
class methods - initializers
C Functionn


24. A view is an...
Continue
variable scope - if defined within a block
instance of UIView or one of its subclasses
references to objects


25. A method in a _ is required unless its preceded by an @optional.
protocol
accessors - individually we call them 'getters' and 'setters'
is called every time the event occurs
for inheritance - adopting the superclasses implementation


26. class methods...
collection of collections - NSArray of an NSArray
group of global functions already assigned to this class
class methods - initializers
message


27. Inside a method - _ is an implicit local variable. Typically - _ is used so that an object can send a message to itself....
self
receiver[message]
Abstraction
safety - subclassability and makes code look more consistent with C structs


28. Proceed through the loop - jump back to the top and check again
view controller's initialization method
Functions
Generic object wrapper for other non-object data types
Continue


29. In Cocoa Touch - the table view asks another object _ what it should display...
NSLog routine
C Functionn
Functions
its dataSource


30. In Objective C arrays can hold only...
Used to find the time right now or to store past or future time/dates
references to objects
'getters' and 'setters'
retain


31. Also if you send the NSObject the _ message - you own that object.
data source - view controller and delegate
retain
NSCoder
receiving and handling events that are associated with it


32. NSSet...
unordered collection of objects - objects must be unique
object
designated initializer
receiver - selector - arguments


33. What happens when the last owner calls release?

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34. Execution of the break statement...
causes the program to immediately exit from the loop it is executing - whether its for - while or do
UIViewController
only the innermost loop in which the break is executed is terminated
nil


35. 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.
implementation
message
Maintenance of state
causes the program to immediately exit from the loop it is executing - whether its for - while or do


36. Hold data and know nothing about the user interface
data source - view controller and delegate
Model Objects[Factory Worker]
(id)initWithFrame:(CGRect)aRect;
only the class and subclasses can access


37. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern
data
@interface ClassName:SuperClassName
self
values


38. Core foundation classes are prefixed with _ and suffixed with _
CF - Ref
lowercase - uppercase
selector[message]
message


39. Each _ has a 'designated' initializer method....
rectangular
the array relinquishes ownership of that object and no longer has a pointer to it
header files declare
class


40. Prefixing a character string with an @ symbol [specific - NSString class]...
pointer - class
they need to be defined in the implementation file
to get and set variables
creates an instance of NSString that holds the character string


41. A view represents a _ area
copy - retain
Controller Objects[Managers]
rectangular
an object's property


42. Use of class methods - there are three...
alloc - singleton - informational utility method?
array[class - NSMutableArray]
its dataSource
ordered collection of objects - immutable


43. Instance Variables by default are called @protected meaning...
pointer - class
is called every time the event occurs
only the class and subclasses can access
delegates and dataSources


44. UIView - designated initializer...
view controller
parentViewController
(id)initWithFrame:(CGRect)aRect;
retain


45. We can use dot notation to reference...

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46. NSDictionary...
setPossessionName
attributes - behavior
protocol
Hash table - Look up objects using a key to get a value.


47. Only exists within the statement block there defined - outside of the block is fine
variable scope - if defined within a block
implementation
setPossessionName
@synthesize


48. When an object is removed from an NSMutableArray - that object is sent the message release;...
define it in the implemenation file
'getters' and 'setters'
the array relinquishes ownership of that object and no longer has a pointer to it
subview(s)


49. super - is used...
object
for inheritance - adopting the superclasses implementation
data source - delegate and view controller
accessors - individually we call them 'getters' and 'setters'


50. Name of the new class - it's superclass - the instance variables that each instance of this class has - and any methods this class implements
only the innermost loop in which the break is executed is terminated
header files declare
@interface ClassName:SuperClassName
selector[message]