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iOS 5 App Development Objective C

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. A view is a subclass of _
attributes - behavior
UIView
Hash table - Look up objects using a key to get a value.
safety - subclassability and makes code look more consistent with C structs

2. A UITableViewController can fill all three roles of...
data source - view controller and delegate
upper
new instances of the class or retrieve some global property of the class.
references to objects

3. When an object is removed from an NSMutableArray - that object is sent the message release;...
Continue
the message release to all its entries
the array relinquishes ownership of that object and no longer has a pointer to it
dealloc - is called on the object & the object's memory is returned to the heap

4. 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...
%d
ready-made instances - instantiation from scratch - and nib based instantiation
setPossessionName
storage

5. NSString *s = @'Hello - World'; is an example of...
declaration and initialization of a variable
self
Maintenance of state
header files declare

6. A callback is a function that is supplied in advance of an event - and...
self
is called every time the event occurs
storage
instance variables

7. An instance is a device for maintaining state. It's a box for _ of data.
safety - subclassability and makes code look more consistent with C structs
super - self
a single-array can contain objects of different types
storage

8. When a view controller presents a modal view controller - the _ of the modal view controller is set to be the parent of the presenting controller
view controller's initialization method
self
NSBundle
parentViewController

9. A view is an...
draw images
instance of UIView or one of its subclasses
instance variables
data

10. [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.
alloc - singleton - informational utility method?
data
instance variables
implementation

11. 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
Continue
data source - delegate and view controller
unordered collection of objects - objects must be unique
Encapsulation of functionality

12. The class is responsible for what instance variables the instance has - but not the _ of those variables.
size and position
will be ignored
%d
values

13. Instance Variables by default are called @protected meaning...
subview(s)
@interface ClassName:SuperClassName
setPossessionName
only the class and subclasses can access

14. Name of the new class - it's superclass - the instance variables that each instance of this class has - and any methods this class implements
data source - view controller and delegate
you always return the newly initialized object(return self)
variable scope - if defined within a block
header files declare

15. Keep view and model objects in sync - control the 'flow' of the application - and save the model objects out to the filesystem
new instances of the class or retrieve some global property of the class.
array[class - NSMutableArray]
Controller Objects[Managers]
an object's property

16. UIView - designated initializer...
references to objects
(id)initWithFrame:(CGRect)aRect;
a mechanism to enable specific callbacks
delegates and dataSources

17. Core foundation classes are prefixed with _ and suffixed with _
will be ignored
class methods - initializers
CF - Ref
only the class and subclasses can access

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

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19. 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
attributes - behavior
view controller's initialization method
view controller

20. Views have three properties related to their location and size: @property _ _;
CGRect bounds - GCPoint center - CGRect frame
designated initializer
is called every time the event occurs
copy - retain

21. 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
pointers
Object wrapper around primitive types like int - float - double - BOOl
Maintenance of state
Generic object wrapper for other non-object data types

22. 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 _.
variable scope - if defined within a block
subview(s)
you must import the header file of that class
to get and set variables

23. Prefixing a character string with an @ symbol [specific - NSString class]...
callbacks
safety - subclassability and makes code look more consistent with C structs
do so in viewDidLoad
creates an instance of NSString that holds the character string

24. if you implemented both the setter and getter - the @synthesize method...
calling code that does the instantiation for you
NSCoder
will be ignored
data

25. If a class declares a _ that is different from its superclass - you must override the superclass' _ to call the new _...
Encapsulation of functionality
receiving and handling events that are associated with it
designated initializer
creating an initializer

26. Only exists within the statement block there defined - outside of the block is fine
variable scope - if defined within a block
UIViewController
@synthesize
type - name and value

27. Ready-made instances...
%d
Anytime you call a method with new - alloc or copy. You own and must release that object.
instance variables
calling code that does the instantiation for you

28. 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.
self
first responder
the array becomes an owner of that object and has a pointer to it.
upper

29. Three ways instances are created...
accessors - individually we call them 'getters' and 'setters'
Core Graphics Framework
ready-made instances - instantiation from scratch - and nib based instantiation
object

30. Reducing details to focus on the core concepts
create a XIB file
Abstraction
NSLog routine
'getters' and 'setters'

31. Primitives and C Structures...
cannot be added to an array
NSBundle
is called every time the event occurs
initializer

32. NSValue - class...
ordered collection of objects - immutable
Generic object wrapper for other non-object data types
pointers
is called every time the event occurs

33. super - is used...
rectangular
the message release to all its entries
causes the program to immediately exit from the loop it is executing - whether its for - while or do
for inheritance - adopting the superclasses implementation

34. Order of the declarations for methods. _ come first - followed by _ - followed by any other methods...
for inheritance - adopting the superclasses implementation
to get and set variables
view controller's initialization method
class methods - initializers

35. @property declares - and _ implements the setter and getter...
UIViewController
Maintenance of state
superclass's
@synthesize

36. When do you take ownership?...
Anytime you call a method with new - alloc or copy. You own and must release that object.
%d
position
is an instance of that class

37. Property List...
data
data source - view controller and delegate
Data Encapsulation
collection of collections - NSArray of an NSArray

38. In Cocoa Touch - the table view asks another object _ what it should display...
designated initializer
type - name and value
its dataSource
data

39. Asking a class or object to execute a method
safety - subclassability and makes code look more consistent with C structs
create a XIB file
message
has one root view controller

40. A method in a _ is required unless its preceded by an @optional.
Model Objects[Factory Worker]
storage
Used to find the time right now or to store past or future time/dates
protocol

41. 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 _.
pointer - class
create a XIB file
retain
to give it someone else - or another object

42. 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
receiver[message]
only the innermost loop in which the break is executed is terminated
selector[message]
Functions

43. Class methods do not operate on an _ or have any access to _ variables....
instance
unordered collection of objects - objects must be unique
the message release to all its entries
CGRect bounds - GCPoint center - CGRect frame

44. 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.
size and position
reuse your cells
instance variables
creating an initializer

45. NSDictionary...
Hash table - Look up objects using a key to get a value.
superclass's
is called every time the event occurs
view controller

46. 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.
'getters' and 'setters'
group of global functions already assigned to this class
position

47. C struct with a CGPoint origin and a CGSize size - in other words two c structs.
you always return the newly initialized object(return self)
pointer to an object
first responder
CGRect

48. 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....
Functions
upper
define it in the implemenation file
viewWillDissapear: and viewWillAppear:

49. Center and frame are used to _ your view
receiver[message]
initializers
position
Core Graphics Framework

50. The only reason to temporarily own an object - is...
pointer to an object
storage
to give it someone else - or another object
receiving and handling events that are associated with it