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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. At the top of any implementation file...
you must import the header file of that class
superclass's
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
instance variables

2. 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.
array[class - NSMutableArray]
super - self
implementation
class's

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

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4. C struct with a CGPoint origin and a CGSize size - in other words two c structs.
subview(s)
instance variables
CGFloat
CGRect

5. Whenever a UINavigationController is about to swap views - it sends out two messages
NSBundle
you must import the header file of that class
alloc - singleton - informational utility method?
viewWillDissapear: and viewWillAppear:

6. In Objective C arrays can hold only...
Object wrapper around primitive types like int - float - double - BOOl
references to objects
only the class and subclasses can access
Core Graphics Framework

7. Views have three properties related to their location and size: @property _ _;
unordered collection of objects - objects must be unique
data source - delegate and view controller
CGRect bounds - GCPoint center - CGRect frame
NSCoder

8. Class methods do not operate on an _ or have any access to _ variables....
ordered collection of objects - immutable
Model Objects[Factory Worker]
designated initializer
instance

9. Inside a method - _ is an implicit local variable. Typically - _ is used so that an object can send a message to itself....
data
object
self
causes the program to immediately exit from the loop it is executing - whether its for - while or do

10. If a break statement is executed from within a set of nested loops...
its dataSource
only the innermost loop in which the break is executed is terminated
upper
Controller Objects[Managers]

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

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12. Order of the declarations for methods. _ come first - followed by _ - followed by any other methods...
class methods - initializers
Continue
only the innermost loop in which the break is executed is terminated
first responder

13. Hold data and know nothing about the user interface
Data Encapsulation
@synthesize
Model Objects[Factory Worker]
superclass's

14. In a class method you cannot access...
the instance variables
alloc - singleton - informational utility method?
CGRect
view controller's initialization method

15. 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....
type - name and value
define it in the implemenation file
Instantiation from scratch
Functions

16. if you implemented both the setter and getter - the @synthesize method...
receiver
You take ownership for an object you want to keep a pointer to
Generic object wrapper for other non-object data types
will be ignored

17. To load a Xib file manually - you use _
NSBundle
draw images
message
NSCoder

18. A UITableViewController can fill all three roles of...
Encapsulation of functionality
callbacks
data source - view controller and delegate
array[class - NSMutableArray]

19. When an object is added to a NSMutableArray - that object is sent the message to retain;...
class's
the array becomes an owner of that object and has a pointer to it.
causes the program to immediately exit from the loop it is executing - whether its for - while or do
only the innermost loop in which the break is executed is terminated

20. Objective C only allows for single inheritance - so in regards to class you only ever see the following pattern
@interface ClassName:SuperClassName
CGRect bounds
initializer
a single-array can contain objects of different types

21. Why properties?
safety - subclassability and makes code look more consistent with C structs
class's
pointer to an object
a mechanism to enable specific callbacks

22. If a class declares a _ that is different from its superclass - you must override the superclass' _ to call the new _...
type - name and value
designated initializer
dealloc - is called on the object & the object's memory is returned to the heap
selector[message]

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

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24. Execution of the break statement...
header files declare
callbacks
in the dealloc - or when a Controller's view is 'unloaded'
causes the program to immediately exit from the loop it is executing - whether its for - while or do

25. A _ handles touch events.
view
an object's property
to give it someone else - or another object
retain

26. Just a floating point number - but we always use it for graphics.
receiving and handling events that are associated with it
to give it someone else - or another object
Model Objects[Factory Worker]
CGFloat

27. Typically the designated initializer has parameters for the most important and frequently used _ of an object
callbacks
will be ignored
ordered collection of objects - immutable
instance variables

28. After accessors have been defined in the header file...
Controller Objects[Managers]
receiving and handling events that are associated with it
Object wrapper around primitive types like int - float - double - BOOl
they need to be defined in the implementation file

29. What does autorelease mean?
subview(s)
wait until the loop finishes processing the event - at the end release it
you always return the newly initialized object(return self)
(id)initWithFrame:(CGRect)aRect;

30. Delegation is an object oriented approach to
count - objectAtIndex - makeObjectsPerformSelector - sortedArrayUsingSelector - lastObject
callbacks
CGRect bounds - GCPoint center - CGRect frame
Model Objects[Factory Worker]

31. The object to which a message is sent - the receiver can be referred to as self from inside the method that is invoked
receiver
subview(s)
retain
Anytime you call a method with new - alloc or copy. You own and must release that object.

32. SomeClass* aVariable = [[SomeClass alloc] init]; is an example of what kind of instance?
Controller Objects[Managers]
has one root view controller
C Functionn
Instantiation from scratch

33. Number one use of protocols in iOS...
its dataSource
header files declare
delegates and dataSources
CGRect bounds

34. Object Oriented based analogue to a function is called a...
method
values
CGRect bounds
callbacks

35. 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
retain
do so in viewDidLoad
Encapsulation of functionality
a single-array can contain objects of different types

36. NSSet...
unordered collection of objects - objects must be unique
NSCoder
Encapsulation of functionality
declaration and initialization of a variable

37. Reference Counting...
receiver - selector - arguments
will be ignored
setPossessionName
You take ownership for an object you want to keep a pointer to

38. NSArray - class...
(id)initWithFrame:(CGRect)aRect;
do so in viewDidLoad
ordered collection of objects - immutable
Instantiation from scratch

39. NSDictionary...
upper
attributes - behavior
only the innermost loop in which the break is executed is terminated
Hash table - Look up objects using a key to get a value.

40. A message is always contained in square brackets - and has three parts
the instance variables
array[class - NSMutableArray]
receiver - selector - arguments
(id)initWithFrame:(CGRect)aRect;

41. Only exists within the statement block there defined - outside of the block is fine
object
Used to find the time right now or to store past or future time/dates
variable scope - if defined within a block
data

42. An instance is a device for maintaining state. It's a box for _ of data.
arguments[message]
receiver
storage
CGRect bounds - GCPoint center - CGRect frame

43. @property declares - and _ implements the setter and getter...
array[class - NSMutableArray]
@synthesize
You take ownership for an object you want to keep a pointer to
upper

44. Primitives and C Structures...
wait until the loop finishes processing the event - at the end release it
cannot be added to an array
an object's property
variable scope - if defined within a block

45. All objects are accessed using...
pointers
NSBundle
NSCoder
viewWillDissapear: and viewWillAppear:

46. 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
view controller's initialization method
receiver - selector - arguments
Maintenance of state
view controller

47. 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...
setPossessionName
an object's property
method
subview(s)

48. 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.
data source - view controller and delegate
class methods - initializers
Abstraction
creating an initializer

49. Also - because arrays only hold a pointer to an object...
self
reuse your cells
CGRect bounds
a single-array can contain objects of different types

50. When an object is removed from an NSMutableArray - that object is sent the message release;...
new instances of the class or retrieve some global property of the class.
Generic object wrapper for other non-object data types
Ready-Made Instance
the array relinquishes ownership of that object and no longer has a pointer to it